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24 changed files with 267 additions and 325 deletions
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52
dist/dde-with-observables.js vendored
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dist/dde.js vendored
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30
dist/esm-with-observables.d.ts vendored
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@ -3,7 +3,6 @@ type Action<V>= (this: { value: V, stopPropagation(): void }, ...a: any[])=> typ
//type SymbolObservable= Symbol;
type SymbolOnclear= symbol;
type Actions<V>= Record<string | SymbolOnclear, Action<V>>;
type OnListenerOptions= Pick<AddEventListenerOptions, "signal"> & { first_time?: boolean };
interface observable{
_: Symbol
/**
@ -41,7 +40,7 @@ interface observable{
...params: A[N] extends (...args: infer P)=> any ? P : never
): void;
clear(...observables: Observable<any, any>[]): void;
on<T>(observable: Observable<T, any>, onchange: (a: T)=> void, options?: OnListenerOptions): void;
on<T>(observable: Observable<T, any>, onchange: (a: T)=> void, options?: AddEventListenerOptions): void;
symbols: {
//observable: SymbolObservable;
onclear: SymbolOnclear;
@ -55,7 +54,7 @@ interface observable{
* */
el<S extends any>(observable: Observable<S, any>, el: (v: S)=> Element | Element[] | DocumentFragment): DocumentFragment;
observedAttributes(custom_element: HTMLElement): Record<string, Observable<any, any>>;
attribute(name: string, initial?: string): Observable<string, {}>;
}
export const observable: observable;
export const O: observable;
@ -65,11 +64,16 @@ declare global {
type ddeActions<V>= Actions<V>
}
type CustomElementTagNameMap= { '#text': Text, '#comment': Comment }
declare global {
interface ddePublicElementTagNameMap{
}
}
type SupportedElement=
HTMLElementTagNameMap[keyof HTMLElementTagNameMap]
| SVGElementTagNameMap[keyof SVGElementTagNameMap]
| MathMLElementTagNameMap[keyof MathMLElementTagNameMap]
| CustomElementTagNameMap[keyof CustomElementTagNameMap]
| ddePublicElementTagNameMap[keyof ddePublicElementTagNameMap];
declare global {
type ddeComponentAttributes= Record<any, any> | undefined;
type ddeElementAddon<El extends SupportedElement | DocumentFragment>= (element: El)=> El | void;
@ -108,7 +112,7 @@ export function classListDeclarative<El extends SupportedElement>(element: El, c
export function assign<El extends SupportedElement>(element: El, ...attrs_array: ElementAttributes<El>[]): El
export function assignAttribute<El extends SupportedElement, ATT extends keyof ElementAttributes<El>>(element: El, attr: ATT, value: ElementAttributes<El>[ATT]): ElementAttributes<El>[ATT]
type ExtendedHTMLElementTagNameMap= HTMLElementTagNameMap & CustomElementTagNameMap;
type ExtendedHTMLElementTagNameMap= HTMLElementTagNameMap & CustomElementTagNameMap & ddePublicElementTagNameMap
type textContent= string | ( (set?: string)=> string ); // TODO: for some reason `Observable<string, any>` leads to `attrs?: any`
export function el<
TAG extends keyof ExtendedHTMLElementTagNameMap & string,
@ -235,23 +239,9 @@ export const scope: {
pop(): ReturnType<Array<Scope>["pop"]>,
};
export function customElementRender<
EL extends HTMLElement,
P extends any = Record<string, any>
>(
custom_element: EL,
target: ShadowRoot | EL,
render: (props: P)=> SupportedElement,
props?: P | ((...args: any[])=> P)
): EL
export function customElementWithDDE<EL extends HTMLElement>(custom_element: EL): EL
export function lifecycleToEvents<EL extends HTMLElement>(custom_element: EL): EL
export function observedAttributes(custom_element: HTMLElement): Record<string, string>
/* TypeScript MEH */
/* TypeScript MEH // TODO for SVG */
type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
declare global{
type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
interface ddeDocumentFragment extends DocumentFragment{ append: ddeAppend<ddeDocumentFragment>; }
interface ddeHTMLElement extends HTMLElement{ append: ddeAppend<ddeHTMLElement>; }
interface ddeSVGElement extends SVGElement{ append: ddeAppend<ddeSVGElement>; }

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dist/esm.d.ts vendored
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@ -3,7 +3,6 @@ type Action<V>= (this: { value: V, stopPropagation(): void }, ...a: any[])=> typ
//type SymbolObservable= Symbol;
type SymbolOnclear= symbol;
type Actions<V>= Record<string | SymbolOnclear, Action<V>>;
type OnListenerOptions= Pick<AddEventListenerOptions, "signal"> & { first_time?: boolean };
interface observable{
_: Symbol
/**
@ -41,7 +40,7 @@ interface observable{
...params: A[N] extends (...args: infer P)=> any ? P : never
): void;
clear(...observables: Observable<any, any>[]): void;
on<T>(observable: Observable<T, any>, onchange: (a: T)=> void, options?: OnListenerOptions): void;
on<T>(observable: Observable<T, any>, onchange: (a: T)=> void, options?: AddEventListenerOptions): void;
symbols: {
//observable: SymbolObservable;
onclear: SymbolOnclear;
@ -55,7 +54,7 @@ interface observable{
* */
el<S extends any>(observable: Observable<S, any>, el: (v: S)=> Element | Element[] | DocumentFragment): DocumentFragment;
observedAttributes(custom_element: HTMLElement): Record<string, Observable<any, any>>;
attribute(name: string, initial?: string): Observable<string, {}>;
}
export const observable: observable;
export const O: observable;
@ -65,11 +64,16 @@ declare global {
type ddeActions<V>= Actions<V>
}
type CustomElementTagNameMap= { '#text': Text, '#comment': Comment }
declare global {
interface ddePublicElementTagNameMap{
}
}
type SupportedElement=
HTMLElementTagNameMap[keyof HTMLElementTagNameMap]
| SVGElementTagNameMap[keyof SVGElementTagNameMap]
| MathMLElementTagNameMap[keyof MathMLElementTagNameMap]
| CustomElementTagNameMap[keyof CustomElementTagNameMap]
| ddePublicElementTagNameMap[keyof ddePublicElementTagNameMap];
declare global {
type ddeComponentAttributes= Record<any, any> | undefined;
type ddeElementAddon<El extends SupportedElement | DocumentFragment>= (element: El)=> El | void;
@ -108,7 +112,7 @@ export function classListDeclarative<El extends SupportedElement>(element: El, c
export function assign<El extends SupportedElement>(element: El, ...attrs_array: ElementAttributes<El>[]): El
export function assignAttribute<El extends SupportedElement, ATT extends keyof ElementAttributes<El>>(element: El, attr: ATT, value: ElementAttributes<El>[ATT]): ElementAttributes<El>[ATT]
type ExtendedHTMLElementTagNameMap= HTMLElementTagNameMap & CustomElementTagNameMap;
type ExtendedHTMLElementTagNameMap= HTMLElementTagNameMap & CustomElementTagNameMap & ddePublicElementTagNameMap
type textContent= string | ( (set?: string)=> string ); // TODO: for some reason `Observable<string, any>` leads to `attrs?: any`
export function el<
TAG extends keyof ExtendedHTMLElementTagNameMap & string,
@ -235,23 +239,9 @@ export const scope: {
pop(): ReturnType<Array<Scope>["pop"]>,
};
export function customElementRender<
EL extends HTMLElement,
P extends any = Record<string, any>
>(
custom_element: EL,
target: ShadowRoot | EL,
render: (props: P)=> SupportedElement,
props?: P | ((...args: any[])=> P)
): EL
export function customElementWithDDE<EL extends HTMLElement>(custom_element: EL): EL
export function lifecycleToEvents<EL extends HTMLElement>(custom_element: EL): EL
export function observedAttributes(custom_element: HTMLElement): Record<string, string>
/* TypeScript MEH */
/* TypeScript MEH // TODO for SVG */
type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
declare global{
type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
interface ddeDocumentFragment extends DocumentFragment{ append: ddeAppend<ddeDocumentFragment>; }
interface ddeHTMLElement extends HTMLElement{ append: ddeAppend<ddeHTMLElement>; }
interface ddeSVGElement extends SVGElement{ append: ddeAppend<ddeSVGElement>; }

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docs/p02-elements.html
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@ -1,4 +1,4 @@
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Basic concepts of elements modifications and creations."><title>`deka-dom-el` — Elements</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki@0.9" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Elements</h1><p>Basic concepts of elements modifications and creations.</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations." class="current">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Native JavaScript DOM elements creations</h2><p>Let’s go through all patterns we would like to use and what needs to be improved for better experience.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Basic concepts of elements modifications and creations."><title>`deka-dom-el` — Elements</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Elements</h1><p>Basic concepts of elements modifications and creations.</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations." class="current">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Native JavaScript DOM elements creations</h2><p>Let’s go through all patterns we would like to use and what needs to be improved for better experience.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
import {
assign,
el, createElement,

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docs/p03-events.html
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@ -1,4 +1,4 @@
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Using not only events in UI declaratively."><title>`deka-dom-el` — Events and Addons</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki@0.9" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Events and Addons</h1><p>Using not only events in UI declaratively.</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively." class="current">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Listenning to the native DOM events and other Addons</h2><p>We quickly introduce helper to listening to the native DOM events. And library syntax/pattern so-called <em>Addon</em> to incorporate not only this in UI templates declaratively.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Using not only events in UI declaratively."><title>`deka-dom-el` — Events and Addons</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Events and Addons</h1><p>Using not only events in UI declaratively.</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively." class="current">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Listenning to the native DOM events and other Addons</h2><p>We quickly introduce helper to listening to the native DOM events. And library syntax/pattern so-called <em>Addon</em> to incorporate not only this in UI templates declaratively.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
import { on, dispatchEvent } from "deka-dom-el";
/** @type {ddeElementAddon} */
@ -67,7 +67,7 @@ document.body.append(
function log({ type, detail }){
console.log({ _this: this, type, detail });
}
</code></div><script>Flems(document.getElementById("code-example-1-35hjjp3e4js"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { el, on } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js\\\";\\nconst paragraph= el(\\\"p\\\", \\\"See live-cycle events in console.\\\",\\n\\tel=> log({ type: \\\"dde:created\\\", detail: el }),\\n\\ton.connected(log),\\n\\ton.disconnected(log),\\n\\ton.attributeChanged(log));\\n\\ndocument.body.append(\\n\\tparagraph,\\n\\tel(\\\"button\\\", \\\"Update attribute\\\", on(\\\"click\\\", ()=> paragraph.setAttribute(\\\"test\\\", Math.random().toString()))),\\n\\t\\\" \\\",\\n\\tel(\\\"button\\\", \\\"Remove\\\", on(\\\"click\\\", ()=> paragraph.remove()))\\n);\\n\\n/** @param {Partial<CustomEvent>} event */\\nfunction log({ type, detail }){\\n\\tconsole.log({ _this: this, type, detail });\\n}\\n\"}],\"toolbar\":false}"));</script><p>For Custom elements, we will later introduce a way to replace <code>*Callback</code> syntax with <code>dde:*</code> events. The <code>on.*</code> functions then listen to the appropriate Custom Elements events (see <a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_components/Using_custom_elements#custom_element_lifecycle_callbacks">Custom element lifecycle callbacks | MDN</a>).</p><p>But, in case of regular elemnets the <a href="https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver"><code>MutationObserver</code> | MDN</a> is internaly used to track these events. Therefore, there are some drawbacks:</p><ul><li>To proper listener registration, you need to use <code>on.*</code> not `on("dde:*", …)`!</li><li>Use sparingly! Internally, library must loop of all registered events and fires event properly. <strong>It is good practice to use the fact that if an element is removed, its children are also removed!</strong> In this spirit, we will introduce later the <strong>host</strong> syntax to register clean up procedures when the component is removed from the app.</li></ul><p>To provide intuitive behaviour, similar also to how the life-cycle events works in other frameworks/libraries, deka-dom-el library ensures that <code>on.connected</code> and <code>on.disconnected</code> are called only once and only when the element is (dis)connected to live DOM. The solution is inspired by <a href="https://vuejs.org/guide/extras/web-components.html#lifecycle" title="Vue and Web Components | Lifecycle">Vue</a>. For using native behaviour re-(dis)connecting element, use:</p><ul><li>custom <code>MutationObserver</code> or logic in (dis)<div class="code"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js"></code></div> or…</li><li>re-add <code>on.connected</code> or <code>on.disconnected</code> listeners.</li></ul><h3 id="h-final-notes"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-final-notes" tabindex="-1">#</a> Final notes</h3><p>The library also provides a&nbsp;method to dispatch the events.</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-2-b6a1hbrxh7s" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { el, on, dispatchEvent } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js";
</code></div><script>Flems(document.getElementById("code-example-1-35hjjp3e4js"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { el, on } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js\\\";\\nconst paragraph= el(\\\"p\\\", \\\"See live-cycle events in console.\\\",\\n\\tel=> log({ type: \\\"dde:created\\\", detail: el }),\\n\\ton.connected(log),\\n\\ton.disconnected(log),\\n\\ton.attributeChanged(log));\\n\\ndocument.body.append(\\n\\tparagraph,\\n\\tel(\\\"button\\\", \\\"Update attribute\\\", on(\\\"click\\\", ()=> paragraph.setAttribute(\\\"test\\\", Math.random().toString()))),\\n\\t\\\" \\\",\\n\\tel(\\\"button\\\", \\\"Remove\\\", on(\\\"click\\\", ()=> paragraph.remove()))\\n);\\n\\n/** @param {Partial<CustomEvent>} event */\\nfunction log({ type, detail }){\\n\\tconsole.log({ _this: this, type, detail });\\n}\\n\"}],\"toolbar\":false}"));</script><p>For Custom elements, we will later introduce a way to replace <code>*Callback</code> syntax with <code>dde:*</code> events. The <code>on.*</code> functions then listen to the appropriate Custom Elements events (see <a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_components/Using_custom_elements#custom_element_lifecycle_callbacks">Custom element lifecycle callbacks | MDN</a>).</p><p>But, in case of regular elemnets the <a href="https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver"><code>MutationObserver</code> | MDN</a> is internaly used to track these events. Therefore, there are some drawbacks:</p><ul><li>To proper listener registration, you need to use <code>on.*</code> not `on("dde:*", …)`!</li><li>Use sparingly! Internally, library must loop of all registered events and fires event properly. <strong>It is good practice to use the fact that if an element is removed, its children are also removed!</strong> In this spirit, we will introduce later the <strong>host</strong> syntax to register clean up procedures when the component is removed from the app.</li></ul><h3 id="h-final-notes"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-final-notes" tabindex="-1">#</a> Final notes</h3><p>The library also provides a&nbsp;method to dispatch the events.</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-2-b6a1hbrxh7s" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { el, on, dispatchEvent } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js";
document.body.append(
el("p", "Listenning to `test` event.", on("test", console.log)).append(
el("br"),

2
docs/p04-observables.html
View File

@ -1,4 +1,4 @@
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Handling reactivity in UI via observables."><title>`deka-dom-el` — Observables and reactivity</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki@0.9" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Observables and reactivity</h1><p>Handling reactivity in UI via observables.</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables." class="current">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Using observables to manage reactivity</h2><p>How a program responds to variable data or user interactions is one of the fundamental problems of programming. If we desire to solve the issue in a declarative manner, observables may be a viable approach.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Handling reactivity in UI via observables."><title>`deka-dom-el` — Observables and reactivity</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Observables and reactivity</h1><p>Handling reactivity in UI via observables.</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables." class="current">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Using observables to manage reactivity</h2><p>How a program responds to variable data or user interactions is one of the fundamental problems of programming. If we desire to solve the issue in a declarative manner, observables may be a viable approach.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js
import { O, observable } from "deka-dom-el/observables";
O===observable
/** @type {ddeObservable} */

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<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Organizing UI into components"><title>`deka-dom-el` — Scopes and components</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki@0.9" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Scopes and components</h1><p>Organizing UI into components</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components" class="current">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Using functions as UI components</h2><p>For state-less components we can use functions as UI components (see “Elements” page). But in real life, we may need to handle the component live-cycle and provide JavaScript the way to properly use the <a href="https://developer.mozilla.org/en-US/docs/Glossary/Garbage_collection" title="Garbage collection | MDN">Garbage collection</a>.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Organizing UI into components"><title>`deka-dom-el` — Scopes and components</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki" defer=""></script><script type="module" src="code.js.js"></script><script src="https://flems.io/flems.html" type="text/javascript" charset="utf-8"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Scopes and components</h1><p>Organizing UI into components</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components" class="current">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE">6. Custom elements</a></nav><main><h2>Using functions as UI components</h2><p>For state-less components we can use functions as UI components (see “Elements” page). But in real life, we may need to handle the component live-cycle and provide JavaScript the way to properly use the <a href="https://developer.mozilla.org/en-US/docs/Glossary/Garbage_collection" title="Garbage collection | MDN">Garbage collection</a>.</p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js
import { scope, el } from "deka-dom-el";
/** @type {ddeElementAddon} */
</code></div><p>The library therefore use <em>scopes</em> to provide these functionalities.</p><h3 id="h-scopes-and-hosts"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-scopes-and-hosts" tabindex="-1">#</a> Scopes and hosts</h3><p>The <strong>host</strong> is the name for the element representing the component. This is typically element returned by function. To get reference, you can use <code>scope.host()</code> to applly addons just use <code>scope.host(...&lt;addons&gt;)</code>.</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-8meex5b3tyo" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { el, on, scope } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js";

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@ -1,4 +1,4 @@
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Using custom elements in combinantion with DDE"><title>`deka-dom-el` — Custom elements</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki@0.9" defer=""></script><script type="module" src="code.js.js"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Custom elements</h1><p>Using custom elements in combinantion with DDE</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE" class="current">6. Custom elements</a></nav><main><h2>Using custom elements in combinantion with DDE</h2><p></p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js
<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><meta name="description" content="Using custom elements in combinantion with DDE"><title>`deka-dom-el` — Custom elements</title><!--<dde:mark type="component" name="metaAuthor" host="this" ssr/>--><meta name="author" content="Jan Andrle"><link type="text/plain" rel="author" href="https://jaandrle.github.io/humans.txt"><meta name="generator" content="deka-dom-el"><!--<dde:mark type="component" name="metaTwitter" host="this" ssr/>--><meta name="twitter:card" content="summary_large_image"><meta name="twitter:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="twitter:title" content="deka-dom-el"><meta name="twitter:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="twitter:creator" content="@jaandrle"><!--<dde:mark type="component" name="metaFacebook" host="this" ssr/>--><meta name="og:url" content="https://github.com/jaandrle/deka-dom-el"><meta name="og:title" content="deka-dom-el"><meta name="og:description" content="A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks."><meta name="og:creator" content="@jaandrle"><script src="https://cdn.jsdelivr.net/npm/shiki" defer=""></script><script type="module" src="code.js.js"></script><link rel="stylesheet" href="global.css"></head><body><!--<dde:mark type="component" name="page" host="this" ssr/>--><!--<dde:mark type="component" name="simplePage" host="this" ssr/>--><!--<dde:mark type="component" name="header" host="this" ssr/>--><header><h1>`deka-dom-el` — Custom elements</h1><p>Using custom elements in combinantion with DDE</p></header><nav><a href="https://github.com/jaandrle/deka-dom-el"><svg class="icon" viewBox="0 0 32 32"><!--<dde:mark type="component" name="iconGitHub" host="parentElement" ssr/>--><path d="M 16,0.395c -8.836,0 -16,7.163 -16,16c 0,7.069 4.585,13.067 10.942,15.182c 0.8,0.148 1.094,-0.347 1.094,-0.77c 0,-0.381 -0.015,-1.642 -0.022,-2.979c -4.452,0.968 -5.391,-1.888 -5.391,-1.888c -0.728,-1.849 -1.776,-2.341 -1.776,-2.341c -1.452,-0.993 0.11,-0.973 0.11,-0.973c 1.606,0.113 2.452,1.649 2.452,1.649c 1.427,2.446 3.743,1.739 4.656,1.33c 0.143,-1.034 0.558,-1.74 1.016,-2.14c -3.554,-0.404 -7.29,-1.777 -7.29,-7.907c 0,-1.747 0.625,-3.174 1.649,-4.295c -0.166,-0.403 -0.714,-2.03 0.155,-4.234c 0,0 1.344,-0.43 4.401,1.64c 1.276,-0.355 2.645,-0.532 4.005,-0.539c 1.359,0.006 2.729,0.184 4.008,0.539c 3.054,-2.07 4.395,-1.64 4.395,-1.64c 0.871,2.204 0.323,3.831 0.157,4.234c 1.026,1.12 1.647,2.548 1.647,4.295c 0,6.145 -3.743,7.498 -7.306,7.895c 0.574,0.497 1.085,1.47 1.085,2.963c 0,2.141 -0.019,3.864 -0.019,4.391c 0,0.426 0.288,0.925 1.099,0.768c 6.354,-2.118 10.933,-8.113 10.933,-15.18c 0,-8.837 -7.164,-16 -16,-16Z"></path></svg>GitHub</a><a href="./" title="Introducing a&nbsp;library.">1. Introduction</a><a href="p02-elements" title="Basic concepts of elements modifications and creations.">2. Elements</a><a href="p03-events" title="Using not only events in UI declaratively.">3. Events and Addons</a><a href="p04-observables" title="Handling reactivity in UI via observables.">4. Observables and reactivity</a><a href="p05-scopes" title="Organizing UI into components">5. Scopes and components</a><a href="p06-customElement" title="Using custom elements in combinantion with DDE" class="current">6. Custom elements</a></nav><main><h2>Using custom elements in combinantion with DDE</h2><p></p><div class="code" data-js="todo"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">// use NPM or for example https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js
import {
customElementRender,
customElementWithDDE,

2
docs_src/components/code.html.js
View File

@ -54,7 +54,7 @@ function registerClientPart(page_id){
if(is_registered[page_id]) return;
document.head.append(
el("script", { src: "https://cdn.jsdelivr.net/npm/shiki@0.9", defer: true }),
el("script", { src: "https://cdn.jsdelivr.net/npm/shiki", defer: true }),
);
registerClientFile(
new URL("./code.js.js", import.meta.url),

11
docs_src/p03-events.html.js
View File

@ -108,17 +108,6 @@ export function page({ pkg, info }){
" clean up procedures when the component is removed from the app."
),
),
el("p").append(
"To provide intuitive behaviour, similar also to how the life-cycle events works in other",
" frameworks/libraries, deka-dom-el library ensures that ", el("code", "on.connected"),
" and ", el("code", "on.disconnected"), " are called only once and only when the element",
" is (dis)connected to live DOM. The solution is inspired by ", el("a", { textContent: "Vue", href: "https://vuejs.org/guide/extras/web-components.html#lifecycle", title: "Vue and Web Components | Lifecycle" }), ".",
" For using native behaviour re-(dis)connecting element, use:"
),
el("ul").append(
el("li").append("custom ", el("code", "MutationObserver"), " or logic in (dis)", el(code, "connectedCallback"), " or…"),
el("li").append("re-add ", el("code", "on.connected"), " or ", el("code", "on.disconnected"), " listeners.")
),
el(h3, "Final notes"),
el("p", "The library also provides a method to dispatch the events."),

2
examples/components/todosComponent.js
View File

@ -84,7 +84,7 @@ function todoComponent({ textContent, value }){
return el("li").append(
O.el(is_editable, is=> is
? el("input", { value: textContent(), type: "text" }, onedited)
: el("span", { textContent, onclick: is_editable.bind(null, true) })
: el("span", { textContent, onclick: is_editable.bind(null, true) }),
),
el("button", { type: "button", value, textContent: "-" }, onclick)
);

6
examples/components/webComponent.js
View File

@ -12,7 +12,9 @@ export class CustomHTMLTestElement extends HTMLElement{
}
connectedCallback(){
if(!this.hasAttribute("pre-name")) this.setAttribute("pre-name", "default");
customElementRender(this, this.attachShadow({ mode: "open" }), this.render, this.attributes)
this.attachShadow({ mode: "open" }).append(
customElementRender(this, this.render, this.attributes)
);
}
attributes(element){
@ -61,7 +63,7 @@ export class CustomSlottingHTMLElement extends HTMLElement{
));
}
connectedCallback(){
customElementRender(this, this, this.render);
this.append(customElementRender(this, this.render));
}
}
customElementWithDDE(CustomSlottingHTMLElement);

13
index.d.ts vendored
View File

@ -1,11 +1,16 @@
import { Observable } from "./observables";
type CustomElementTagNameMap= { '#text': Text, '#comment': Comment }
declare global {
interface ddePublicElementTagNameMap{
}
}
type SupportedElement=
HTMLElementTagNameMap[keyof HTMLElementTagNameMap]
| SVGElementTagNameMap[keyof SVGElementTagNameMap]
| MathMLElementTagNameMap[keyof MathMLElementTagNameMap]
| CustomElementTagNameMap[keyof CustomElementTagNameMap]
| ddePublicElementTagNameMap[keyof ddePublicElementTagNameMap];
declare global {
type ddeComponentAttributes= Record<any, any> | undefined;
type ddeElementAddon<El extends SupportedElement | DocumentFragment>= (element: El)=> El | void;
@ -43,7 +48,7 @@ export function classListDeclarative<El extends SupportedElement>(element: El, c
export function assign<El extends SupportedElement>(element: El, ...attrs_array: ElementAttributes<El>[]): El
export function assignAttribute<El extends SupportedElement, ATT extends keyof ElementAttributes<El>>(element: El, attr: ATT, value: ElementAttributes<El>[ATT]): ElementAttributes<El>[ATT]
type ExtendedHTMLElementTagNameMap= HTMLElementTagNameMap & CustomElementTagNameMap;
type ExtendedHTMLElementTagNameMap= HTMLElementTagNameMap & CustomElementTagNameMap & ddePublicElementTagNameMap
type textContent= string | ( (set?: string)=> string ); // TODO: for some reason `Observable<string, any>` leads to `attrs?: any`
export function el<
TAG extends keyof ExtendedHTMLElementTagNameMap & string,
@ -175,7 +180,6 @@ export function customElementRender<
P extends any = Record<string, any>
>(
custom_element: EL,
target: ShadowRoot | EL,
render: (props: P)=> SupportedElement,
props?: P | ((...args: any[])=> P)
): EL
@ -183,10 +187,9 @@ export function customElementWithDDE<EL extends HTMLElement>(custom_element: EL)
export function lifecycleToEvents<EL extends HTMLElement>(custom_element: EL): EL
export function observedAttributes(custom_element: HTMLElement): Record<string, string>
/* TypeScript MEH */
/* TypeScript MEH // TODO for SVG */
type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
declare global{
type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
interface ddeDocumentFragment extends DocumentFragment{ append: ddeAppend<ddeDocumentFragment>; }
interface ddeHTMLElement extends HTMLElement{ append: ddeAppend<ddeHTMLElement>; }
interface ddeSVGElement extends SVGElement{ append: ddeAppend<ddeSVGElement>; }

3
observables.d.ts vendored
View File

@ -3,7 +3,6 @@ type Action<V>= (this: { value: V, stopPropagation(): void }, ...a: any[])=> typ
//type SymbolObservable= Symbol;
type SymbolOnclear= symbol;
type Actions<V>= Record<string | SymbolOnclear, Action<V>>;
type OnListenerOptions= Pick<AddEventListenerOptions, "signal"> & { first_time?: boolean };
interface observable{
_: Symbol
/**
@ -41,7 +40,7 @@ interface observable{
...params: A[N] extends (...args: infer P)=> any ? P : never
): void;
clear(...observables: Observable<any, any>[]): void;
on<T>(observable: Observable<T, any>, onchange: (a: T)=> void, options?: OnListenerOptions): void;
on<T>(observable: Observable<T, any>, onchange: (a: T)=> void, options?: AddEventListenerOptions): void;
symbols: {
//observable: SymbolObservable;
onclear: SymbolOnclear;

12
package.json
View File

@ -1,6 +1,6 @@
{
"name": "deka-dom-el",
"version": "0.7.8",
"version": "0.7.7",
"description": "A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks.",
"author": "Jan Andrle <andrle.jan@centrum.cz>",
"license": "MIT",
@ -59,24 +59,18 @@
"size-limit": [
{
"path": "./index.js",
"limit": "10.5 kB",
"limit": "10 kB",
"gzip": false,
"brotli": false
},
{
"path": "./observables.js",
"limit": "12 kB",
"limit": "11.5 kB",
"gzip": false,
"brotli": false
},
{
"path": "./index-with-observables.js",
"limit": "15 kB",
"gzip": false,
"brotli": false
},
{
"path": "./index-with-observables.js",
"limit": "5 kB"

36
src/customElement.js
View File

@ -1,40 +1,30 @@
import { keyLTE, evc, evd, eva } from "./dom-common.js";
import { scope } from "./dom.js";
import { c_ch_o } from "./events-observer.js";
export function customElementRender(custom_element, target, render, props= observedAttributes){
export function customElementRender(custom_element, render, props= observedAttributes){
scope.push({
scope: custom_element,
host: (...c)=> c.length ? c.forEach(c=> c(custom_element)) : custom_element
host: (...c)=> c.length ? c.forEach(c=> c(custom_element)) : custom_element,
custom_element
});
if(typeof props==="function") props= props.call(custom_element, custom_element);
const is_lte= custom_element[keyLTE];
if(!is_lte) lifecycleToEvents(custom_element);
const out= render.call(custom_element, props);
if(!is_lte) custom_element.dispatchEvent(new Event(evc));
if(target.nodeType===11 && typeof target.mode==="string") // is ShadowRoot
custom_element.addEventListener(evd, c_ch_o.observe(target), { once: true });
scope.pop();
return target.append(out);
return out;
}
export function lifecycleToEvents(class_declaration){
wrapMethod(class_declaration.prototype, "connectedCallback", function(target, thisArg, detail){
target.apply(thisArg, detail);
thisArg.dispatchEvent(new Event(evc));
});
wrapMethod(class_declaration.prototype, "disconnectedCallback", function(target, thisArg, detail){
target.apply(thisArg, detail);
(queueMicrotask || setTimeout)(
()=> !thisArg.isConnected && thisArg.dispatchEvent(new Event(evd))
);
});
wrapMethod(class_declaration.prototype, "attributeChangedCallback", function(target, thisArg, detail){
for (const name of [ "connected", "disconnected" ])
wrapMethod(class_declaration.prototype, name+"Callback", function(target, thisArg, detail){
target.apply(thisArg, detail);
thisArg.dispatchEvent(new Event("dde:"+name));
});
const name= "attributeChanged";
wrapMethod(class_declaration.prototype, name+"Callback", function(target, thisArg, detail){
const [ attribute, , value ]= detail;
thisArg.dispatchEvent(new CustomEvent(eva, {
thisArg.dispatchEvent(new CustomEvent("dde:"+name, {
detail: [ attribute, value ]
}));
target.apply(thisArg, detail);
});
class_declaration.prototype[keyLTE]= true;
class_declaration.prototype.__dde_lifecycleToEvents= true;
return class_declaration;
}
export { lifecycleToEvents as customElementWithDDE };

4
src/dom-common.js
View File

@ -26,7 +26,3 @@ function setDeleteAttr(obj, prop, val){
if(Reflect.get(obj, prop)==="undefined")
return Reflect.set(obj, prop, "");
}
export const keyLTE= "__dde_lifecycleToEvents"; //boolean
export const evc= "dde:connected";
export const evd= "dde:disconnected";
export const eva= "dde:attributeChanged";

1
src/dom.js
View File

@ -5,6 +5,7 @@ import { enviroment as env } from './dom-common.js';
const scopes= [ {
get scope(){ return env.D.body; },
host: c=> c ? c(env.D.body) : env.D.body,
custom_element: false,
prevent: true,
} ];
export const scope= {

138
src/events-observer.js
View File

@ -1,138 +0,0 @@
import { enviroment as env, evc, evd } from './dom-common.js';
export const c_ch_o= env.M ? connectionsChangesObserverConstructor() : new Proxy({}, {
get(){ return ()=> {}; }
});
function connectionsChangesObserverConstructor(){
const store= new Map();
let is_observing= false;
const observerListener= stop=> function(mutations){
for(const mutation of mutations){
if(mutation.type!=="childList") continue;
if(observerAdded(mutation.addedNodes, true)){
stop();
continue;
}
if(observerRemoved(mutation.removedNodes, true))
stop();
}
};
const observer= new env.M(observerListener(stop));
return {
observe(element){
const o= new env.M(observerListener(()=> {}));
o.observe(element, { childList: true, subtree: true });
return ()=> o.disconnect();
},
onConnected(element, listener){
start();
const listeners= getElementStore(element);
if(listeners.connected.has(listener)) return;
listeners.connected.add(listener);
listeners.length_c+= 1;
},
offConnected(element, listener){
if(!store.has(element)) return;
const ls= store.get(element);
if(!ls.connected.has(listener)) return;
ls.connected.delete(listener);
ls.length_c-= 1;
cleanWhenOff(element, ls);
},
onDisconnected(element, listener){
start();
const listeners= getElementStore(element);
if(listeners.disconnected.has(listener)) return;
listeners.disconnected.add(listener);
listeners.length_d+= 1;
},
offDisconnected(element, listener){
if(!store.has(element)) return;
const ls= store.get(element);
if(!ls.disconnected.has(listener)) return;
ls.disconnected.delete(listener);
ls.length_d-= 1;
cleanWhenOff(element, ls);
}
};
function cleanWhenOff(element, ls){
if(ls.length_c || ls.length_d)
return;
store.delete(element);
stop();
}
function getElementStore(element){
if(store.has(element)) return store.get(element);
const out= {
connected: new WeakSet(),
length_c: 0,
disconnected: new WeakSet(),
length_d: 0
};
store.set(element, out);
return out;
}
function start(){
if(is_observing) return;
is_observing= true;
observer.observe(env.D.body, { childList: true, subtree: true });
}
function stop(){
if(!is_observing || store.size) return;
is_observing= false;
observer.disconnect();
}
//TODO remount support?
function requestIdle(){ return new Promise(function(resolve){
(requestIdleCallback || requestAnimationFrame)(resolve);
}); }
async function collectChildren(element){
if(store.size > 30)//TODO limit?
await requestIdle();
const out= [];
if(!(element instanceof Node)) return out;
for(const el of store.keys()){
if(el===element || !(el instanceof Node)) continue;
if(element.contains(el))
out.push(el);
}
return out;
}
function observerAdded(addedNodes, is_root){
let out= false;
for(const element of addedNodes){
if(is_root) collectChildren(element).then(observerAdded);
if(!store.has(element)) continue;
const ls= store.get(element);
if(!ls.length_c) continue;
element.dispatchEvent(new Event(evc));
ls.connected= new WeakSet();
ls.length_c= 0;
if(!ls.length_d) store.delete(element);
out= true;
}
return out;
}
function observerRemoved(removedNodes, is_root){
let out= false;
for(const element of removedNodes){
if(is_root) collectChildren(element).then(observerRemoved);
if(!store.has(element)) continue;
const ls= store.get(element);
if(!ls.length_d) continue;
(queueMicrotask || setTimeout)(dispatchRemove(element));
out= true;
}
return out;
}
function dispatchRemove(element){
return ()=> {
if(element.isConnected) return;
element.dispatchEvent(new Event(evd));
store.delete(element);
};
}
}

171
src/events.js
View File

@ -1,5 +1,5 @@
export { registerReactivity } from './observables-common.js';
import { enviroment as env, keyLTE, evc, evd, eva } from './dom-common.js';
import { enviroment as env } from './dom-common.js';
export function dispatchEvent(name, options, host){
if(!options) options= {};
@ -19,17 +19,25 @@ export function on(event, listener, options){
};
}
import { c_ch_o } from "./events-observer.js";
const c_ch_o= env.M ? connectionsChangesObserverConstructor() : new Proxy({}, {
get(){ return ()=> {}; }
});
const els_attribute_store= new WeakSet();
import { scope } from "./dom.js";
import { onAbort } from './helpers.js';
const lifeOptions= obj=> Object.assign({}, typeof obj==="object" ? obj : null, { once: true });
//TODO: cleanUp when event before abort?
//TODO: docs (e.g.) https://nolanlawson.com/2024/01/13/web-component-gotcha-constructor-vs-connectedcallback/
on.connected= function(listener, options){
options= lifeOptions(options);
const { custom_element }= scope.current;
const name= "connected";
if(typeof options !== "object")
options= {};
options.once= true;
return function registerElement(element){
element.addEventListener(evc, listener, options);
if(element[keyLTE]) return element;
if(element.isConnected) return ( element.dispatchEvent(new Event(evc)), element );
if(custom_element) element= custom_element;
const event= "dde:"+name;
element.addEventListener(event, listener, options);
if(element.__dde_lifecycleToEvents) return element;
if(element.isConnected) return ( element.dispatchEvent(new Event(event)), element );
const c= onAbort(options.signal, ()=> c_ch_o.offConnected(element, listener));
if(c) c_ch_o.onConnected(element, listener);
@ -37,10 +45,16 @@ on.connected= function(listener, options){
};
};
on.disconnected= function(listener, options){
options= lifeOptions(options);
const { custom_element }= scope.current;
const name= "disconnected";
if(typeof options !== "object")
options= {};
options.once= true;
return function registerElement(element){
element.addEventListener(evd, listener, options);
if(element[keyLTE]) return element;
if(custom_element) element= custom_element;
const event= "dde:"+name;
element.addEventListener(event, listener, options);
if(element.__dde_lifecycleToEvents) return element;
const c= onAbort(options.signal, ()=> c_ch_o.offDisconnected(element, listener));
if(c) c_ch_o.onDisconnected(element, listener);
@ -56,13 +70,14 @@ on.disconnectedAsAbort= function(host){
host(on.disconnected(()=> a.abort()));
return a;
};
const els_attribute_store= new WeakSet();
on.attributeChanged= function(listener, options){
const name= "attributeChanged";
if(typeof options !== "object")
options= {};
return function registerElement(element){
element.addEventListener(eva, listener, options);
if(element[keyLTE] || els_attribute_store.has(element))
const event= "dde:"+name;
element.addEventListener(event, listener, options);
if(element.__dde_lifecycleToEvents || els_attribute_store.has(element))
return element;
if(!env.M) return element;
@ -70,11 +85,135 @@ on.attributeChanged= function(listener, options){
const observer= new env.M(function(mutations){
for(const { attributeName, target } of mutations)
target.dispatchEvent(
new CustomEvent(eva, { detail: [ attributeName, target.getAttribute(attributeName) ] }));
new CustomEvent(event, { detail: [ attributeName, target.getAttribute(attributeName) ] }));
});
const c= onAbort(options.signal, ()=> observer.disconnect());
if(c) observer.observe(element, { attributes: true });
//TODO: clean up when element disconnected
return element;
};
};
};
function connectionsChangesObserverConstructor(){
const store= new Map();
let is_observing= false;
const observer= new env.M(function(mutations){
for(const mutation of mutations){
if(mutation.type!=="childList") continue;
if(observerAdded(mutation.addedNodes, true)){
stop();
continue;
}
if(observerRemoved(mutation.removedNodes, true))
stop();
}
});
return {
onConnected(element, listener){
start();
const listeners= getElementStore(element);
if(listeners.connected.has(listener)) return;
listeners.connected.add(listener);
listeners.length_c+= 1;
},
offConnected(element, listener){
if(!store.has(element)) return;
const ls= store.get(element);
if(!ls.connected.has(listener)) return;
ls.connected.delete(listener);
ls.length_c-= 1;
cleanWhenOff(element, ls);
},
onDisconnected(element, listener){
start();
const listeners= getElementStore(element);
if(listeners.disconnected.has(listener)) return;
listeners.disconnected.add(listener);
listeners.length_d+= 1;
},
offDisconnected(element, listener){
if(!store.has(element)) return;
const ls= store.get(element);
if(!ls.disconnected.has(listener)) return;
ls.disconnected.delete(listener);
ls.length_d-= 1;
cleanWhenOff(element, ls);
}
};
function cleanWhenOff(element, ls){
if(ls.length_c || ls.length_d)
return;
store.delete(element);
stop();
}
function getElementStore(element){
if(store.has(element)) return store.get(element);
const out= {
connected: new WeakSet(),
length_c: 0,
disconnected: new WeakSet(),
length_d: 0
};
store.set(element, out);
return out;
}
function start(){
if(is_observing) return;
is_observing= true;
observer.observe(env.D.body, { childList: true, subtree: true });
}
function stop(){
if(!is_observing || store.size) return;
is_observing= false;
observer.disconnect();
}
//TODO remount support?
function requestIdle(){ return new Promise(function(resolve){
(requestIdleCallback || requestAnimationFrame)(resolve);
}); }
async function collectChildren(element, filter){
if(store.size > 30)//TODO limit?
await requestIdle();
const out= [];
if(!(element instanceof Node)) return out;
for(const el of store.keys()){
if(el===element || !(el instanceof Node) || filter(el)) continue;
if(element.contains(el))
out.push(el);
}
return out;
}
function observerAdded(addedNodes, is_root){
let out= false;
for(const element of addedNodes){
if(is_root) collectChildren(element, el=> !el.isConnectedd).then(observerAdded);
if(!store.has(element)) continue;
const ls= store.get(element);
if(!ls.length_c) continue;
element.dispatchEvent(new Event("dde:connected"));
ls.connected= new WeakSet();
ls.length_c= 0;
if(!ls.length_d) store.delete(element);
out= true;
}
return out;
}
function observerRemoved(removedNodes, is_root){
let out= false;
for(const element of removedNodes){
if(is_root) collectChildren(element, el=> el.isConnectedd).then(observerRemoved);
if(!store.has(element)) continue;
const ls= store.get(element);
if(!ls.length_d) continue;
element.dispatchEvent(new Event("dde:disconnected"));
store.delete(element);
out= true;
}
return out;
}
}

19
src/observables-lib.js
View File

@ -96,7 +96,7 @@ observable.el= function(o, map){
out.append(mark_start, mark_end);
const { current }= scope;
const reRenderReactiveElement= v=> {
if(!mark_start.parentNode || !mark_end.parentNode) // isConnected or wasn’t yet rendered
if(!mark_start.parentNode || !mark_end.parentNode)
return removeObservableListener(o, reRenderReactiveElement);
scope.push(current);
let els= map(v);
@ -107,21 +107,12 @@ observable.el= function(o, map){
while(( el_r= mark_start.nextSibling ) !== mark_end)
el_r.remove();
mark_start.after(...els);
if(mark_start.isConnected)
requestCleanUpReactives(current.host());
};
addObservableListener(o, reRenderReactiveElement);
removeObservablesFromElements(o, reRenderReactiveElement, mark_start, map);
reRenderReactiveElement(o());
return out;
};
function requestCleanUpReactives(host){
if(!host || !host[key_reactive]) return;
(requestIdleCallback || setTimeout)(function(){
host[key_reactive]= host[key_reactive]
.filter(([ o, el ])=> el.isConnected ? true : (removeObservableListener(...o), false));
});
}
import { on } from "./events.js";
import { observedAttributes } from "./helpers.js";
const observedAttributeActions= {
@ -161,11 +152,7 @@ export const observables_config= {
isObservable,
processReactiveAttribute(element, key, attrs, set){
if(!isObservable(attrs)) return attrs;
const l= attr=> {
if(!element.isConnected)
return removeObservableListener(attrs, l);
set(key, attr);
};
const l= attr=> set(key, attr);
addObservableListener(attrs, l);
removeObservablesFromElements(attrs, l, element, key);
return attrs();
@ -269,4 +256,4 @@ function removeObservableListener(o, listener, clear_when_empty){
deps.get(c).forEach(sig=> removeObservableListener(sig, c, true));
}
return out;
}
}