Darkmodus erkennen und nutzen

So erkennt man den Darkmodus , bzw so arbeitet man damit
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Der hier verwendete Code

<!doctype html>
<html lang="en" class="bg-gray-100 dark:bg-gray-900 transition-colors duration-500 ease-in-out">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Davy de Vries</title>
<link href="https://fonts.googleapis.com/css?family=Nunito:200,300,400,600,700,800,900" rel="stylesheet">
<style>
/*! tailwindcss v2.1.2 | MIT License | https://tailwindcss.com *//*! modern-normalize v1.1.0 | MIT License | https://github.com/sindresorhus/modern-normalize */
/*
Document
========
*/
/**
Use a better box model (opinionated).
*/
*,
::before,
::after {
box-sizing: border-box;
}
/**
Use a more readable tab size (opinionated).
*/
html {
-moz-tab-size: 4;
-o-tab-size: 4;
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