diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..cae4f4c
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,26 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = tab
+trim_trailing_whitespace = true
+max_line_length = 120
+
+[*.json]
+max_line_length = unset
+
+[*.yml]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[LICENSE]
+max_line_length = unset
+
+[dist/**]
+indent_style = unset
+max_line_length = unset
+trim_trailing_whitespace = unset
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
new file mode 100644
index 0000000..11e01b9
--- /dev/null
+++ b/.github/workflows/pr.yml
@@ -0,0 +1,23 @@
+# https://nektosact.com/usage/index.html
+# https://github.com/reviewdog/action-eclint
+name: On PR
+on:
+  workflow_dispatch:
+  pull_request:
+    branches: [main]
+
+jobs:
+  pr:
+    name: Validates formatting and linting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: reviewdog/action-eclint@d51e853275e707b64c0526881ada324f454c1110 # v1.7.1
+        with:
+          reporter: github-pr-check
+          eclint_flags: '--fix'
+      - uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
+        with:
+          node-version: 20.16
+      - run: npm ci
+      - run: bs/lint.sh
diff --git a/docs/components/examples/customElement/observedAttributes.js b/docs/components/examples/customElement/observedAttributes.js
index bee6d3e..035618a 100644
--- a/docs/components/examples/customElement/observedAttributes.js
+++ b/docs/components/examples/customElement/observedAttributes.js
@@ -2,7 +2,7 @@ import {
 	customElementRender,
 	customElementWithDDE,
 	observedAttributes,
-	el, on, scope
+	el, on, scope,
 } from "deka-dom-el";
 import { S } from "deka-dom-el/signals";
 export class HTMLCustomElement extends HTMLElement{
@@ -24,7 +24,7 @@ export class HTMLCustomElement extends HTMLElement{
 /** @param {{ attr: ddeSignal<string, {}> }} props */
 function ddeComponent({ attr }){
 	scope.host(
-		on.connected(e=> console.log(e.target.outerHTML)),
+		on.connected(e=> console.log(( /** @type {HTMLParagraphElement} */ (e.target)).outerHTML)),
 	);
 	return el().append(
 		el("p", S(()=> `Hello from Custom Element with attribute '${attr()}'`))