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Implement dark/light mode based on system preference #587

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Implement dark/light mode based on system preference #587

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55 changes: 55 additions & 0 deletions Layout.astro
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Original file line number Diff line number Diff line change
@@ -0,0 +1,55 @@
---
interface Props {
title: string;
}

const { title } = Astro.props;
---

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<link rel="icon" type="image/svg+xml" href="/favicon.svg">
<meta name="generator" content={Astro.generator} />
<title>{title}</title>
</head>
<body>
<slot />
<script>
const theme = () => {
const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
document.documentElement.dataset.theme = prefersDark ? 'dark' : 'light';
}

theme();

window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
theme();
});
</script>
</body>
</html>

<style is:global>
:root {
--color-text: #24292e;
--color-background: #fff;
}

[data-theme="dark"] {
--color-text: #fff;
--color-background: #24292e;
}

html {
font-family: system-ui, sans-serif;
background-color: var(--color-background);
color: var(--color-text);
}

code {
font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
}
</style>