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white-space: pre; white-space: pre;
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background: #212121 !important; background: #212121 !important;
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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="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://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-signals" title="Handling reactivity in UI via signals.">4. Signals and reactivity</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><h3 id="h-creating-elements-with-custom-attributes"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-creating-elements-with-custom-attributes" tabindex="-1">#</a> Creating element(s) (with custom attributes)</h3><p>You can create a native DOM element by using the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/createElement" title="MDN documentation for document.createElement()"><code>document.createElement()</code></a>. It is also possible to provide a&nbsp;some attribute(s) declaratively using <code>Object.assign()</code>. More precisely, this way you can sets some <a href="https://developer.mozilla.org/en-US/docs/Glossary/IDL" title="MDN page about Interface Description Language"><abbr title="Interface Description Language">IDL</abbr></a> also known as a JavaScript property.</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-nkz9lcdhykg" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">document.body.append( <!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-signals" title="Handling reactivity in UI via signals.">4. Signals and reactivity</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">// when NPM
import { assign, el, elNS } from "deka-dom-el";
// https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
// “internal” utils
import {
assignAttribute,
classListDeclarative,
chainableAppend
} from "deka-dom-el";
</code></div><h3 id="h-creating-elements-with-custom-attributes"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-creating-elements-with-custom-attributes" tabindex="-1">#</a> Creating element(s) (with custom attributes)</h3><p>You can create a native DOM element by using the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/createElement" title="MDN documentation for document.createElement()"><code>document.createElement()</code></a>. It is also possible to provide a&nbsp;some attribute(s) declaratively using <code>Object.assign()</code>. More precisely, this way you can sets some <a href="https://developer.mozilla.org/en-US/docs/Glossary/IDL" title="MDN page about Interface Description Language"><abbr title="Interface Description Language">IDL</abbr></a> also known as a JavaScript property.</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-nkz9lcdhykg" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">document.body.append(
document.createElement("div") document.createElement("div")
); );
console.log( console.log(
@ -130,4 +140,4 @@ document.body.append(
console.log( console.log(
document.body.innerHTML.includes("&lt;svg&gt;&lt;/svg&gt;&lt;math&gt;&lt;/math&gt;") document.body.innerHTML.includes("&lt;svg&gt;&lt;/svg&gt;&lt;math&gt;&lt;/math&gt;")
) )
</code></div><script>Flems(document.getElementById("code-example-1-bcjydb50gdc"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { elNS, assign } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\nconst elSVG= elNS(\\\"http://www.w3.org/2000/svg\\\");\\nconst elMath= elNS(\\\"http://www.w3.org/1998/Math/MathML\\\");\\ndocument.body.append(\\n\\telSVG(\\\"svg\\\"), // see https://developer.mozilla.org/en-US/docs/Web/SVG and https://developer.mozilla.org/en-US/docs/Web/API/SVGElement\\n\\telMath(\\\"math\\\") // see https://developer.mozilla.org/en-US/docs/Web/MathML and https://developer.mozilla.org/en-US/docs/Web/MathML/Global_attributes\\n);\\n\\nconsole.log(\\n\\tdocument.body.innerHTML.includes(\\\"<svg></svg><math></math>\\\")\\n)\\n\"}],\"toolbar\":false}"));</script><div class="notice"><p>Mnemonic</p><ul><li><code>assign(&lt;element&gt;, ...&lt;idl-objects&gt;): &lt;element&gt;</code> — assign properties to the element</li><li><code>el(&lt;tag-name&gt;, &lt;primitive&gt;)[.append(...)]: &lt;element-from-tag-name&gt;</code> — simple element containing only text</li><li><code>el(&lt;tag-name&gt;, &lt;idl-object&gt;)[.append(...)]: &lt;element-from-tag-name&gt;</code> — element with more properties</li><li><code>el(&lt;function&gt;, &lt;function-argument(s)&gt;)[.append(...)]: &lt;element-returned-by-function&gt;</code> — using component represented by function</li><li><code>el(&lt;...&gt;, &lt;...&gt;, ...&lt;addons&gt;)</code> — see following page</li><li><code>elNS(&lt;namespace&gt;)(&lt;as-el-see-above&gt;)[.append(...)]: &lt;element-based-on-arguments&gt;</code> — typically SVG elements</li></ul></div><div class="prevNext"><!--<dde:mark type="component" name="prevNext" host="parentElement" ssr/>--><a rel="prev" href="./" title="Introducing a&nbsp;library."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->Introduction (previous)</a><a rel="next" href="p03-events" title="Using not only events in UI declaratively."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->(next) Events and Addons</a></div></main></body></html> </code></div><script>Flems(document.getElementById("code-example-1-bcjydb50gdc"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { elNS, assign } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\nconst elSVG= elNS(\\\"http://www.w3.org/2000/svg\\\");\\nconst elMath= elNS(\\\"http://www.w3.org/1998/Math/MathML\\\");\\ndocument.body.append(\\n\\telSVG(\\\"svg\\\"), // see https://developer.mozilla.org/en-US/docs/Web/SVG and https://developer.mozilla.org/en-US/docs/Web/API/SVGElement\\n\\telMath(\\\"math\\\") // see https://developer.mozilla.org/en-US/docs/Web/MathML and https://developer.mozilla.org/en-US/docs/Web/MathML/Global_attributes\\n);\\n\\nconsole.log(\\n\\tdocument.body.innerHTML.includes(\\\"<svg></svg><math></math>\\\")\\n)\\n\"}],\"toolbar\":false}"));</script><div class="notice"><!--<dde:mark type="component" name="mnemonicUl" host="parentElement" ssr/>--><h3 id="h-mnemonic"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-mnemonic" tabindex="-1">#</a> Mnemonic</h3><ul><li><code>assign(&lt;element&gt;, ...&lt;idl-objects&gt;): &lt;element&gt;</code> — assign properties to the element</li><li><code>el(&lt;tag-name&gt;, &lt;primitive&gt;)[.append(...)]: &lt;element-from-tag-name&gt;</code> — simple element containing only text</li><li><code>el(&lt;tag-name&gt;, &lt;idl-object&gt;)[.append(...)]: &lt;element-from-tag-name&gt;</code> — element with more properties</li><li><code>el(&lt;function&gt;, &lt;function-argument(s)&gt;)[.append(...)]: &lt;element-returned-by-function&gt;</code> — using component represented by function</li><li><code>el(&lt;...&gt;, &lt;...&gt;, ...&lt;addons&gt;)</code> — see following page</li><li><code>elNS(&lt;namespace&gt;)(&lt;as-el-see-above&gt;)[.append(...)]: &lt;element-based-on-arguments&gt;</code> — typically SVG elements</li></ul></div><div class="prevNext"><!--<dde:mark type="component" name="prevNext" host="parentElement" ssr/>--><a rel="prev" href="./" title="Introducing a&nbsp;library."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->Introduction (previous)</a><a rel="next" href="p03-events" title="Using not only events in UI declaratively."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->(next) Events and Addons</a></div></main></body></html>

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@ -1,4 +1,11 @@
<!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://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-signals" title="Handling reactivity in UI via signals.">4. Signals and reactivity</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><h3 id="h-events-and-listenners"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-events-and-listenners" tabindex="-1">#</a> Events and listenners</h3><p>In JavaScript you can listen to the native DOM events of the given element by using <a href="https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener" title="addEventListener on MDN"><code>element.addEventListener(type, listener, options)</code></a>. The library provides an alternative (<code>on</code>) accepting the differen order of the arguments:</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-1wmddlo83w68" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { el, on } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.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-signals" title="Handling reactivity in UI via signals.">4. Signals and reactivity</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">// when NPM
import { on, dispatchEvent } from "deka-dom-el";
// https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
/**
* @type {ddeElementAddon}
* */
</code></div><h3 id="h-events-and-listenners"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-events-and-listenners" tabindex="-1">#</a> Events and listenners</h3><p>In JavaScript you can listen to the native DOM events of the given element by using <a href="https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener" title="addEventListener on MDN"><code>element.addEventListener(type, listener, options)</code></a>. The library provides an alternative (<code>on</code>) accepting the differen order of the arguments:</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-1wmddlo83w68" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { el, on } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js";
const log= mark=&gt; console.log.bind(console, mark); const log= mark=&gt; console.log.bind(console, mark);
const button= el("button", "Test click"); const button= el("button", "Test click");
@ -87,4 +94,4 @@ function dde(){
function ddeOptions(){ function ddeOptions(){
dispatchEvent("test", { bubbles: true })(this, "hi"); dispatchEvent("test", { bubbles: true })(this, "hi");
} }
</code></div><script>Flems(document.getElementById("code-example-2-b6a1hbrxh7s"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { el, on, dispatchEvent } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\ndocument.body.append(\\n\\tel(\\\"p\\\", \\\"Listenning to `test` event.\\\", on(\\\"test\\\", console.log)).append(\\n\\t\\tel(\\\"br\\\"),\\n\\t\\tel(\\\"button\\\", \\\"native\\\", on(\\\"click\\\", native)),\\n\\t\\t\\\" \\\",\\n\\t\\tel(\\\"button\\\", \\\"dde\\\", on(\\\"click\\\", dde)),\\n\\t\\t\\\" \\\",\\n\\t\\tel(\\\"button\\\", \\\"dde with options\\\", on(\\\"click\\\", ddeOptions))\\n\\t)\\n);\\nfunction native(){\\n\\tthis.dispatchEvent(\\n\\t\\tnew CustomEvent(\\\"test\\\",\\n\\t\\t\\t{ bubbles: true, detail: \\\"hi\\\" }\\n\\t\\t)\\n\\t);\\n}\\nfunction dde(){\\n\\tdispatchEvent(\\\"test\\\")(this.parentElement, \\\"hi\\\");\\n}\\nfunction ddeOptions(){\\n\\tdispatchEvent(\\\"test\\\", { bubbles: true })(this, \\\"hi\\\");\\n}\\n\"}],\"toolbar\":false}"));</script><div class="notice"><p>Mnemonic</p><ul><li><code>on(&lt;event&gt;, &lt;listener&gt;[, &lt;options&gt;])(&lt;element&gt;)</code> — just <code>&lt;element&gt;.addEventListener(&lt;event&gt;, &lt;listener&gt;[, &lt;options&gt;])</code></li><li><code>on.&lt;live-cycle&gt;(&lt;event&gt;, &lt;listener&gt;[, &lt;options&gt;])(&lt;element&gt;)</code> — corresponds to custom elemnets callbacks <code>&lt;live-cycle&gt;Callback(...){...}</code>. To connect to custom element see following page, else it is simulated by MutationObserver.</li><li><code>dispatchEvent(&lt;event&gt;[, &lt;options&gt;])(element)</code> — just <code>&lt;element&gt;.dispatchEvent(new Event(&lt;event&gt;[, &lt;options&gt;]))</code></li><li><code>dispatchEvent(&lt;event&gt;[, &lt;options&gt;])(element, detail)</code> — just <code>&lt;element&gt;.dispatchEvent(new CustomEvent(&lt;event&gt;, { detail, ...&lt;options&gt; }))</code></li></ul></div><div class="prevNext"><!--<dde:mark type="component" name="prevNext" host="parentElement" ssr/>--><a rel="prev" href="p02-elements" title="Basic concepts of elements modifications and creations."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->Elements (previous)</a><a rel="next" href="p04-signals" title="Handling reactivity in UI via signals."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->(next) Signals and reactivity</a></div></main></body></html> </code></div><script>Flems(document.getElementById("code-example-2-b6a1hbrxh7s"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { el, on, dispatchEvent } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\ndocument.body.append(\\n\\tel(\\\"p\\\", \\\"Listenning to `test` event.\\\", on(\\\"test\\\", console.log)).append(\\n\\t\\tel(\\\"br\\\"),\\n\\t\\tel(\\\"button\\\", \\\"native\\\", on(\\\"click\\\", native)),\\n\\t\\t\\\" \\\",\\n\\t\\tel(\\\"button\\\", \\\"dde\\\", on(\\\"click\\\", dde)),\\n\\t\\t\\\" \\\",\\n\\t\\tel(\\\"button\\\", \\\"dde with options\\\", on(\\\"click\\\", ddeOptions))\\n\\t)\\n);\\nfunction native(){\\n\\tthis.dispatchEvent(\\n\\t\\tnew CustomEvent(\\\"test\\\",\\n\\t\\t\\t{ bubbles: true, detail: \\\"hi\\\" }\\n\\t\\t)\\n\\t);\\n}\\nfunction dde(){\\n\\tdispatchEvent(\\\"test\\\")(this.parentElement, \\\"hi\\\");\\n}\\nfunction ddeOptions(){\\n\\tdispatchEvent(\\\"test\\\", { bubbles: true })(this, \\\"hi\\\");\\n}\\n\"}],\"toolbar\":false}"));</script><div class="notice"><!--<dde:mark type="component" name="mnemonicUl" host="parentElement" ssr/>--><h3 id="h-mnemonic"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-mnemonic" tabindex="-1">#</a> Mnemonic</h3><ul><li><code>on(&lt;event&gt;, &lt;listener&gt;[, &lt;options&gt;])(&lt;element&gt;)</code> — just <code>&lt;element&gt;.addEventListener(&lt;event&gt;, &lt;listener&gt;[, &lt;options&gt;])</code></li><li><code>on.&lt;live-cycle&gt;(&lt;event&gt;, &lt;listener&gt;[, &lt;options&gt;])(&lt;element&gt;)</code> — corresponds to custom elemnets callbacks <code>&lt;live-cycle&gt;Callback(...){...}</code>. To connect to custom element see following page, else it is simulated by MutationObserver.</li><li><code>dispatchEvent(&lt;event&gt;[, &lt;options&gt;])(element)</code> — just <code>&lt;element&gt;.dispatchEvent(new Event(&lt;event&gt;[, &lt;options&gt;]))</code></li><li><code>dispatchEvent(&lt;event&gt;[, &lt;options&gt;])(element, detail)</code> — just <code>&lt;element&gt;.dispatchEvent(new CustomEvent(&lt;event&gt;, { detail, ...&lt;options&gt; }))</code></li></ul></div><div class="prevNext"><!--<dde:mark type="component" name="prevNext" host="parentElement" ssr/>--><a rel="prev" href="p02-elements" title="Basic concepts of elements modifications and creations."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->Elements (previous)</a><a rel="next" href="p04-signals" title="Handling reactivity in UI via signals."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->(next) Signals and reactivity</a></div></main></body></html>

16
docs/p04-signals.html
View File

@ -1,4 +1,14 @@
<!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 signals."><title>`deka-dom-el` — Signals 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://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` — Signals and reactivity</h1><p>Handling reactivity in UI via signals.</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-signals" title="Handling reactivity in UI via signals." class="current">4. Signals and reactivity</a></nav><main><h2>Using signals 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, signals may be a viable approach.</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-opc0krfvn3k" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { S } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.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 signals."><title>`deka-dom-el` — Signals 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` — Signals and reactivity</h1><p>Handling reactivity in UI via signals.</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-signals" title="Handling reactivity in UI via signals." class="current">4. Signals and reactivity</a></nav><main><h2>Using signals 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, signals 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">// when NPM
import { S } from "deka-dom-el/signals";
// https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js
/**
* @type {ddeSignal}
* */
/**
* @type {ddeActions}
* */
</code></div><h3 id="h-introducing-signals"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-introducing-signals" tabindex="-1">#</a> Introducing signals</h3><p>Using signals, we split program logic into the three parts. Firstly (α), we create a&nbsp;variable (constant) representing reactive value. Somewhere later, we can register (β) a&nbsp;logic reacting to the signal value changes. Similarly, in a&nbsp;remaining part (γ), we can update the signal value.</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-1gy5flu0x85c" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { S } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js";
// α — `signal` represents a&nbsp;reactive value // α — `signal` represents a&nbsp;reactive value
const signal= S(0); const signal= S(0);
// β — just reacts on signal changes // β — just reacts on signal changes
@ -6,7 +16,7 @@ S.on(signal, console.log);
// γ — just updates the value // γ — just updates the value
signal(signal()+1); signal(signal()+1);
setInterval(()=&gt; signal(signal()+1), 5000); setInterval(()=&gt; signal(signal()+1), 5000);
</code></div><script>Flems(document.getElementById("code-example-1-opc0krfvn3k"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { S } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\n// α — `signal` represents a reactive value\\nconst signal= S(0);\\n// β — just reacts on signal changes\\nS.on(signal, console.log);\\n// γ — just updates the value\\nsignal(signal()+1);\\nsetInterval(()=> signal(signal()+1), 5000);\\n\"}],\"toolbar\":false}"));</script><h3 id="h-introducing-signals"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-introducing-signals" tabindex="-1">#</a> Introducing signals</h3><p>Using signals, we split program logic into the three parts. Firstly (α), we create a&nbsp;variable (constant) representing reactive value. Somewhere later, we can register (β) a&nbsp;logic reacting to the signal value changes. Similarly, in a&nbsp;remaining part (γ), we can update the signal value.</p><p>All this is just an&nbsp;example of <a href="https://en.wikipedia.org/wiki/Event-driven_programming" title="Wikipedia: Event-driven programming">Event-driven programming</a> and <a href="https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern" title="Wikipedia: Publish–subscribe pattern">Publish–subscribe pattern</a> (compare for example with <a href="https://www.npmjs.com/package/fpubsub" title="NPM package: fpubsub">fpubsub library</a>). All three parts can be in some manner independent and still connected to the same reactive entity.</p><p>Signals are implemented in the library as functions. To see current value of signal, just call it without any arguments <code>console.log(signal())</code>. To update the signal value, pass any argument <code>signal('a new value')</code>. For listenning the signal value changes, use <code>S.on(signal, console.log)</code>.</p><p>Similarly to the <code>on</code> function to register DOM events listener. You can use <code>AbortController</code>/<code>AbortSignal</code> to <em>off</em>/stop listenning. For representing “live” piece of code computation pattern:</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-e9cfsaeb64o" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { S } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js"; </code></div><script>Flems(document.getElementById("code-example-1-1gy5flu0x85c"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { S } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\n// α — `signal` represents a reactive value\\nconst signal= S(0);\\n// β — just reacts on signal changes\\nS.on(signal, console.log);\\n// γ — just updates the value\\nsignal(signal()+1);\\nsetInterval(()=> signal(signal()+1), 5000);\\n\"}],\"toolbar\":false}"));</script><p>All this is just an&nbsp;example of <a href="https://en.wikipedia.org/wiki/Event-driven_programming" title="Wikipedia: Event-driven programming">Event-driven programming</a> and <a href="https://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern" title="Wikipedia: Publish–subscribe pattern">Publish–subscribe pattern</a> (compare for example with <a href="https://www.npmjs.com/package/fpubsub" title="NPM package: fpubsub">fpubsub library</a>). All three parts can be in some manner independent and still connected to the same reactive entity.</p><p>Signals are implemented in the library as functions. To see current value of signal, just call it without any arguments <code>console.log(signal())</code>. To update the signal value, pass any argument <code>signal('a new value')</code>. For listenning the signal value changes, use <code>S.on(signal, console.log)</code>.</p><p>Similarly to the <code>on</code> function to register DOM events listener. You can use <code>AbortController</code>/<code>AbortSignal</code> to <em>off</em>/stop listenning. For representing “live” piece of code computation pattern:</p><!--<dde:mark type="component" name="example" host="this" ssr/>--><div id="code-example-1-e9cfsaeb64o" class="example"><!--<dde:mark type="component" name="code" host="parentElement" ssr/>--><code class="language-js">import { S } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js";
const signal= S(0); const signal= S(0);
// computation pattern // computation pattern
const double= S(()=&gt; 2*signal()); const double= S(()=&gt; 2*signal());
@ -22,4 +32,4 @@ ac.signal.addEventListener("abort",
()=&gt; setTimeout(()=&gt; clearInterval(id), 2*interval)); ()=&gt; setTimeout(()=&gt; clearInterval(id), 2*interval));
setTimeout(()=&gt; ac.abort(), 3*interval) setTimeout(()=&gt; ac.abort(), 3*interval)
</code></div><script>Flems(document.getElementById("code-example-1-e9cfsaeb64o"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { S } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\nconst signal= S(0);\\n// computation pattern\\nconst double= S(()=> 2*signal());\\n\\nconst ac= new AbortController();\\nS.on(signal, v=> console.log(\\\"signal\\\", v), { signal: ac.signal });\\nS.on(double, v=> console.log(\\\"double\\\", v), { signal: ac.signal });\\n\\nsignal(signal()+1);\\nconst interval= 5000;\\nconst id= setInterval(()=> signal(signal()+1), interval);\\nac.signal.addEventListener(\\\"abort\\\",\\n\\t()=> setTimeout(()=> clearInterval(id), 2*interval));\\n\\nsetTimeout(()=> ac.abort(), 3*interval)\\n\"}],\"toolbar\":false}"));</script><div class="notice"><p>Mnemonic</p><ul><li><code>S(&lt;value&gt;)</code> — signal: reactive value</li><li><code>S(()=&gt; &lt;computation&gt;)</code> — signal: reactive value dependent on calculation using other signals</li><li><code>S.on(&lt;signal&gt;, &lt;listener&gt;[, &lt;options&gt;])</code> — listen to the signal value changes</li><li><code>S.clear(...&lt;signals&gt;)</code> — off and clear signals</li><li><code>S(&lt;value&gt;, &lt;actions&gt;)</code> — signal: pattern to create complex reactive objects/arrays</li><li><code>S.action(&lt;signal&gt;, &lt;action-name&gt;, ...&lt;action-arguments&gt;)</code> — invoke an&nbsp;action for given signal</li></ul></div><div class="prevNext"><!--<dde:mark type="component" name="prevNext" host="parentElement" ssr/>--><a rel="prev" href="p03-events" title="Using not only events in UI declaratively."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->Events and Addons (previous)</a><!--<dde:mark type="component" name="pageLink" host="this" ssr/>--></div></main></body></html> </code></div><script>Flems(document.getElementById("code-example-1-e9cfsaeb64o"), JSON.parse("{\"files\":[{\"name\":\".js\",\"content\":\"import { S } from \\\"https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js\\\";\\nconst signal= S(0);\\n// computation pattern\\nconst double= S(()=> 2*signal());\\n\\nconst ac= new AbortController();\\nS.on(signal, v=> console.log(\\\"signal\\\", v), { signal: ac.signal });\\nS.on(double, v=> console.log(\\\"double\\\", v), { signal: ac.signal });\\n\\nsignal(signal()+1);\\nconst interval= 5000;\\nconst id= setInterval(()=> signal(signal()+1), interval);\\nac.signal.addEventListener(\\\"abort\\\",\\n\\t()=> setTimeout(()=> clearInterval(id), 2*interval));\\n\\nsetTimeout(()=> ac.abort(), 3*interval)\\n\"}],\"toolbar\":false}"));</script><div class="notice"><!--<dde:mark type="component" name="mnemonicUl" host="parentElement" ssr/>--><h3 id="h-mnemonic"><!--<dde:mark type="component" name="h3" host="parentElement" ssr/>--><a href="#h-mnemonic" tabindex="-1">#</a> Mnemonic</h3><ul><li><code>S(&lt;value&gt;)</code> — signal: reactive value</li><li><code>S(()=&gt; &lt;computation&gt;)</code> — signal: reactive value dependent on calculation using other signals</li><li><code>S.on(&lt;signal&gt;, &lt;listener&gt;[, &lt;options&gt;])</code> — listen to the signal value changes</li><li><code>S.clear(...&lt;signals&gt;)</code> — off and clear signals</li><li><code>S(&lt;value&gt;, &lt;actions&gt;)</code> — signal: pattern to create complex reactive objects/arrays</li><li><code>S.action(&lt;signal&gt;, &lt;action-name&gt;, ...&lt;action-arguments&gt;)</code> — invoke an&nbsp;action for given signal</li></ul></div><div class="prevNext"><!--<dde:mark type="component" name="prevNext" host="parentElement" ssr/>--><a rel="prev" href="p03-events" title="Using not only events in UI declaratively."><!--<dde:mark type="component" name="pageLink" host="parentElement" ssr/>-->Events and Addons (previous)</a><!--<dde:mark type="component" name="pageLink" host="this" ssr/>--></div></main></body></html>

7
docs_src/components/code.html.js
View File

@ -14,6 +14,7 @@ ${host}{
--shiki-token-punctuation: var(--code); --shiki-token-punctuation: var(--code);
--shiki-token-link: #EE0000; --shiki-token-link: #EE0000;
white-space: pre; white-space: pre;
overflow: scroll;
} }
${host}[data-js=todo]{ ${host}[data-js=todo]{
border: 1px solid var(--border); border: 1px solid var(--border);
@ -30,11 +31,13 @@ import { el } from "deka-dom-el";
* @param {object} attrs * @param {object} attrs
* @param {string} [attrs.id] * @param {string} [attrs.id]
* @param {string} [attrs.className] * @param {string} [attrs.className]
* @param {string} attrs.content Example code file path * @param {URL} [attrs.src] Example code file path
* @param {string} [attrs.content] Example code
* @param {"js"|"ts"|"html"|"css"} [attrs.language="js"] Language of the code * @param {"js"|"ts"|"html"|"css"} [attrs.language="js"] Language of the code
* @param {string} [attrs.page_id] ID of the page, if setted it registers shiki * @param {string} [attrs.page_id] ID of the page, if setted it registers shiki
* */ * */
export function code({ id, content, language= "js", className= "code", page_id }){ export function code({ id, src, content, language= "js", className= host.slice(1), page_id }){
if(src) content= s.cat(src);
let dataJS; let dataJS;
if(page_id){ if(page_id){
registerClientPart(page_id); registerClientPart(page_id);

10
docs_src/components/examples/elements/intro.js Normal file
View File

@ -0,0 +1,10 @@
// when NPM
import { assign, el, elNS } from "deka-dom-el";
// https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
// “internal” utils
import {
assignAttribute,
classListDeclarative,
chainableAppend
} from "deka-dom-el";

7
docs_src/components/examples/events/intro.js Normal file
View File

@ -0,0 +1,7 @@
// when NPM
import { on, dispatchEvent } from "deka-dom-el";
// https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm.js
/**
* @type {ddeElementAddon}
* */

16
docs_src/components/examples/signals/intro.js
View File

@ -1,8 +1,10 @@
// when NPM
import { S } from "deka-dom-el/signals"; import { S } from "deka-dom-el/signals";
// α — `signal` represents a reactive value // https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-signals.js
const signal= S(0);
// β — just reacts on signal changes /**
S.on(signal, console.log); * @type {ddeSignal}
// γ — just updates the value * */
signal(signal()+1); /**
setInterval(()=> signal(signal()+1), 5000); * @type {ddeActions}
* */

8
docs_src/components/examples/signals/signals.js Normal file
View File

@ -0,0 +1,8 @@
import { S } from "deka-dom-el/signals";
// α — `signal` represents a reactive value
const signal= S(0);
// β — just reacts on signal changes
S.on(signal, console.log);
// γ — just updates the value
signal(signal()+1);
setInterval(()=> signal(signal()+1), 5000);

19
docs_src/components/mnemonicUl.html.js Normal file
View File

@ -0,0 +1,19 @@
import { styles } from "../ssr.js";
import { h3 } from "./pageUtils.html.js";
const host= ".notice";
styles.css`
${host} h3{
margin-top: 0;
}
`;
import { el, simulateSlots } from "deka-dom-el";
/** @param {Object} props @param {string} props.textContent */
export function mnemonicUl({ textContent= "" }){
if(textContent) textContent= " – "+textContent
return simulateSlots(el("div", { className: "notice" }).append(
el(h3, "Mnemonic"+textContent),
el("ul").append(
el("slot")
)
));
}

45
docs_src/p02-elements.html.js
View File

@ -3,6 +3,8 @@ import { simplePage } from "./layout/simplePage.html.js";
import { el } from "deka-dom-el"; import { el } from "deka-dom-el";
import { example } from "./components/example.html.js"; import { example } from "./components/example.html.js";
import { h3 } from "./components/pageUtils.html.js"; import { h3 } from "./components/pageUtils.html.js";
import { mnemonicUl } from "./components/mnemonicUl.html.js";
import { code } from "./components/code.html.js";
/** @param {string} url */ /** @param {string} url */
const fileURL= url=> new URL(url, import.meta.url); const fileURL= url=> new URL(url, import.meta.url);
/** @param {import("./types.d.ts").PageAttrs} attrs */ /** @param {import("./types.d.ts").PageAttrs} attrs */
@ -12,6 +14,8 @@ export function page({ pkg, info }){
el("h2", "Native JavaScript DOM elements creations"), el("h2", "Native JavaScript DOM elements creations"),
el("p", "Let’s go through all patterns we would like to use and what needs to be improved for better experience."), el("p", "Let’s go through all patterns we would like to use and what needs to be improved for better experience."),
el(code, { src: fileURL("./components/examples/elements/intro.js"), page_id }),
el(h3, "Creating element(s) (with custom attributes)"), el(h3, "Creating element(s) (with custom attributes)"),
el("p").append( el("p").append(
"You can create a native DOM element by using the ", "You can create a native DOM element by using the ",
@ -112,28 +116,25 @@ export function page({ pkg, info }){
), ),
el(example, { src: fileURL("./components/examples/elements/dekaElNS.js"), page_id }), el(example, { src: fileURL("./components/examples/elements/dekaElNS.js"), page_id }),
el("div", { className: "notice" }).append( el(mnemonicUl).append(
el("p", "Mnemonic"), el("li").append(
el("ul").append( el("code", "assign(<element>, ...<idl-objects>): <element>"), " — assign properties to the element",
el("li").append( ),
el("code", "assign(<element>, ...<idl-objects>): <element>"), " — assign properties to the element", el("li").append(
), el("code", "el(<tag-name>, <primitive>)[.append(...)]: <element-from-tag-name>"), " — simple element containing only text",
el("li").append( ),
el("code", "el(<tag-name>, <primitive>)[.append(...)]: <element-from-tag-name>"), " — simple element containing only text", el("li").append(
), el("code", "el(<tag-name>, <idl-object>)[.append(...)]: <element-from-tag-name>"), " — element with more properties",
el("li").append( ),
el("code", "el(<tag-name>, <idl-object>)[.append(...)]: <element-from-tag-name>"), " — element with more properties", el("li").append(
), el("code", "el(<function>, <function-argument(s)>)[.append(...)]: <element-returned-by-function>"), " — using component represented by function",
el("li").append( ),
el("code", "el(<function>, <function-argument(s)>)[.append(...)]: <element-returned-by-function>"), " — using component represented by function", el("li").append(
), el("code", "el(<...>, <...>, ...<addons>)"), " — see following page"
el("li").append( ),
el("code", "el(<...>, <...>, ...<addons>)"), " — see following page" el("li").append(
), el("code", "elNS(<namespace>)(<as-el-see-above>)[.append(...)]: <element-based-on-arguments>"), " — typically SVG elements",
el("li").append(
el("code", "elNS(<namespace>)(<as-el-see-above>)[.append(...)]: <element-based-on-arguments>"), " — typically SVG elements",
)
) )
), )
); );
} }

35
docs_src/p03-events.html.js
View File

@ -3,6 +3,8 @@ import { simplePage } from "./layout/simplePage.html.js";
import { el } from "deka-dom-el"; import { el } from "deka-dom-el";
import { example } from "./components/example.html.js"; import { example } from "./components/example.html.js";
import { h3 } from "./components/pageUtils.html.js"; import { h3 } from "./components/pageUtils.html.js";
import { mnemonicUl } from "./components/mnemonicUl.html.js";
import { code } from "./components/code.html.js";
/** @param {string} url */ /** @param {string} url */
const fileURL= url=> new URL(url, import.meta.url); const fileURL= url=> new URL(url, import.meta.url);
/** @param {import("./types.d.ts").PageAttrs} attrs */ /** @param {import("./types.d.ts").PageAttrs} attrs */
@ -17,6 +19,8 @@ export function page({ pkg, info }){
" incorporate not only this in UI templates declaratively." " incorporate not only this in UI templates declaratively."
), ),
el(code, { src: fileURL("./components/examples/events/intro.js"), page_id }),
el(h3, "Events and listenners"), el(h3, "Events and listenners"),
el("p").append( el("p").append(
"In JavaScript you can listen to the native DOM events of the given element by using ", "In JavaScript you can listen to the native DOM events of the given element by using ",
@ -109,23 +113,20 @@ export function page({ pkg, info }){
el("p", "The library also provides a method to dispatch the events."), el("p", "The library also provides a method to dispatch the events."),
el(example, { src: fileURL("./components/examples/events/compareDispatch.js"), page_id }), el(example, { src: fileURL("./components/examples/events/compareDispatch.js"), page_id }),
el("div", { className: "notice" }).append( el(mnemonicUl).append(
el("p", "Mnemonic"), el("li").append(
el("ul").append( el("code", "on(<event>, <listener>[, <options>])(<element>)"), " — just ", el("code", "<element>.addEventListener(<event>, <listener>[, <options>])")
el("li").append( ),
el("code", "on(<event>, <listener>[, <options>])(<element>)"), " — just ", el("code", "<element>.addEventListener(<event>, <listener>[, <options>])") el("li").append(
), el("code", "on.<live-cycle>(<event>, <listener>[, <options>])(<element>)"), " — corresponds to custom elemnets callbacks ", el("code", "<live-cycle>Callback(...){...}"),
el("li").append( ". To connect to custom element see following page, else it is simulated by MutationObserver."
el("code", "on.<live-cycle>(<event>, <listener>[, <options>])(<element>)"), " — corresponds to custom elemnets callbacks ", el("code", "<live-cycle>Callback(...){...}"), ),
". To connect to custom element see following page, else it is simulated by MutationObserver." el("li").append(
), el("code", "dispatchEvent(<event>[, <options>])(element)"), " — just ", el("code", "<element>.dispatchEvent(new Event(<event>[, <options>]))")
el("li").append( ),
el("code", "dispatchEvent(<event>[, <options>])(element)"), " — just ", el("code", "<element>.dispatchEvent(new Event(<event>[, <options>]))") el("li").append(
), el("code", "dispatchEvent(<event>[, <options>])(element, detail)"), " — just ", el("code", "<element>.dispatchEvent(new CustomEvent(<event>, { detail, ...<options> }))")
el("li").append( ),
el("code", "dispatchEvent(<event>[, <options>])(element, detail)"), " — just ", el("code", "<element>.dispatchEvent(new CustomEvent(<event>, { detail, ...<options> }))")
),
)
), ),
); );
} }

44
docs_src/p04-signals.html.js
View File

@ -3,6 +3,8 @@ import { simplePage } from "./layout/simplePage.html.js";
import { el } from "deka-dom-el"; import { el } from "deka-dom-el";
import { example } from "./components/example.html.js"; import { example } from "./components/example.html.js";
import { h3 } from "./components/pageUtils.html.js"; import { h3 } from "./components/pageUtils.html.js";
import { mnemonicUl } from "./components/mnemonicUl.html.js";
import { code } from "./components/code.html.js";
/** @param {string} url */ /** @param {string} url */
const fileURL= url=> new URL(url, import.meta.url); const fileURL= url=> new URL(url, import.meta.url);
@ -17,7 +19,7 @@ export function page({ pkg, info }){
" If we desire to solve the issue in a declarative manner,", " If we desire to solve the issue in a declarative manner,",
" signals may be a viable approach.", " signals may be a viable approach.",
), ),
el(example, { src: fileURL("./components/examples/signals/intro.js"), page_id }), el(code, { src: fileURL("./components/examples/signals/intro.js"), page_id }),
el(h3, "Introducing signals"), el(h3, "Introducing signals"),
el("p").append( el("p").append(
@ -27,6 +29,7 @@ export function page({ pkg, info }){
" to the signal value changes. Similarly, in a remaining part (γ), we", " to the signal value changes. Similarly, in a remaining part (γ), we",
" can update the signal value." " can update the signal value."
), ),
el(example, { src: fileURL("./components/examples/signals/signals.js"), page_id }),
el("p").append( el("p").append(
"All this is just an example of ", "All this is just an example of ",
el("a", { textContent: "Event-driven programming", href: "https://en.wikipedia.org/wiki/Event-driven_programming", title: "Wikipedia: Event-driven programming" }), el("a", { textContent: "Event-driven programming", href: "https://en.wikipedia.org/wiki/Event-driven_programming", title: "Wikipedia: Event-driven programming" }),
@ -48,27 +51,24 @@ export function page({ pkg, info }){
" ", el("em", "off"), "/stop listenning. For representing “live” piece of code computation pattern:" " ", el("em", "off"), "/stop listenning. For representing “live” piece of code computation pattern:"
), ),
el(example, { src: fileURL("./components/examples/signals/computations-abort.js"), page_id }), el(example, { src: fileURL("./components/examples/signals/computations-abort.js"), page_id }),
el("div", { className: "notice" }).append( el(mnemonicUl).append(
el("p", "Mnemonic"), el("li").append(
el("ul").append( el("code", "S(<value>)"), " — signal: reactive value",
el("li").append( ),
el("code", "S(<value>)"), " — signal: reactive value", el("li").append(
), el("code", "S(()=> <computation>)"), " — signal: reactive value dependent on calculation using other signals",
el("li").append( ),
el("code", "S(()=> <computation>)"), " — signal: reactive value dependent on calculation using other signals", el("li").append(
), el("code", "S.on(<signal>, <listener>[, <options>])"), " — listen to the signal value changes",
el("li").append( ),
el("code", "S.on(<signal>, <listener>[, <options>])"), " — listen to the signal value changes", el("li").append(
), el("code", "S.clear(...<signals>)"), " — off and clear signals",
el("li").append( ),
el("code", "S.clear(...<signals>)"), " — off and clear signals", el("li").append(
), el("code", "S(<value>, <actions>)"), " — signal: pattern to create complex reactive objects/arrays",
el("li").append( ),
el("code", "S(<value>, <actions>)"), " — signal: pattern to create complex reactive objects/arrays", el("li").append(
), el("code", "S.action(<signal>, <action-name>, ...<action-arguments>)"), " — invoke an action for given signal"
el("li").append(
el("code", "S.action(<signal>, <action-name>, ...<action-arguments>)"), " — invoke an action for given signal"
)
) )
), ),
); );

2
package.json
View File

@ -1,6 +1,6 @@
{ {
"name": "deka-dom-el", "name": "deka-dom-el",
"version": "0.7.1", "version": "0.7.2",
"description": "A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks.", "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>", "author": "Jan Andrle <andrle.jan@centrum.cz>",
"license": "MIT", "license": "MIT",