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Add Shadow DOM examples #245

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Jan 17, 2024
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Add Shadow DOM examples #245

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Add Shadow DOM examples
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@pepelsbey
pepelsbey committed Jan 17, 2024
commit ee13128862089ae5fbad81b8a00b68f0d787f66a
4 changes: 4 additions & 0 deletions shadow-dom/README.md
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# Shadow DOM

- [Simple `<template shadowrootmode="open">` example](https://mdn.github.io/dom-examples/shadow-dom/shadowrootmode/simple.html)
- [CSS scoping with `<template shadowrootmode="open">`](https://mdn.github.io/dom-examples/shadow-dom/shadowrootmode/scoping.html)
46 changes: 46 additions & 0 deletions shadow-dom/shadowrootmode/scoping.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>CSS scoping in declarative shadow DOM</title>
<style>
body {
font-family: sans-serif;
}
</style>
</head>
<body>
<p hidden>⛔ Your browser doesn't support <code>shadowrootmode</code> attribute yet.</p>
<article>
<style>
p {
padding: 8px;
background-color: wheat;
}
</style>
<p>I'm in the DOM.</p>
</article>
<article>
<template shadowrootmode="open">
<style>
p {
padding: 8px;
background-color: plum;
}
</style>
<p>I'm in the Shadow DOM.</p>
</template>
</article>

<script>
const isShadowRootModeSupported = HTMLTemplateElement.prototype.hasOwnProperty('shadowRootMode');

document.querySelector('p[hidden]').toggleAttribute('hidden', isShadowRootModeSupported);
</script>
<!--
Used in:
- https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template
-->
</body>
</html>
19 changes: 19 additions & 0 deletions shadow-dom/shadowrootmode/simple.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Declarative shadow DOM</title>
</head>
<body>
<div id="host">
<template shadowrootmode="open">
<span>I'm in the shadow DOM</span>
</template>
</div>
<!--
Used in:
- https://developer.mozilla.org/en-US/docs/Web/API/Web_components/Using_shadow_DOM
-->
</body>
</html>