We have previously talked about useState before. A great way to create CSS classes on the fly is to use state variable!
Here is an example of how to create Dark Mode in React by using string interpolation to construct the individual classes based on the state variable mode.
index.html
<html>
<head>
<script type="module" src="./index.js"></script>
<link rel="stylesheet" href="./index.css">
</head>
<body>
<div id="root">loading</div>
</body>
</html>index.jsx
import React from "react";
import { createRoot } from "react-dom/client";
import App from "./App";
const rootElement = document.getElementById("root");
const root = createRoot(rootElement);
root.render(<App />);App.jsx
import React, { useState } from "react";
import "./App.css";
const App = () => {
const [mode, setMode] = useState("light");
const toggleTheme = () => {
if (mode === "light") {
setMode("dark");
} else {
setMode("light");
}
};
return (
<div id="app-wrapper" className={`theme-${ mode }`}>
<h1>Welcome to my page</h1>
<p>Do you want it like this?</p>
<button onClick={toggleTheme}>Change Theme</button>
</div>
);
};
export default App;App.css
body {
margin: 0;
}
#app-wrapper {
width: 100%;
height: 100%;
padding: 4px;
}
.theme-light {
background-color: white;
color: black;
}
.theme-dark {
background-color: black;
color: white;
}So, if you’re wondering how to put darkmode into your website, here’s one of the ways to go about it!
Here is another bonus for you in creating CSS classes on the fly: a code that display the content in a list or grid.
index.html
<html>
<head>
<script type="module" src="./index.js"></script>
<link rel="stylesheet" href="./index.css">
</head>
<body>
<div id="root">loading</div>
</body>
</html>index.jsx
import React from "react";
import { createRoot } from "react-dom/client";
import App from "./App";
const rootElement = document.getElementById("root");
const root = createRoot(rootElement);
root.render(<App />);
App.jsx
import React, { useState } from "react";
import "./App.css";
const App = () => {
const [layout, setLayout] = useState("grid");
const toggleLayout = () => {
if (layout === "grid") {
setLayout("list");
} else {
setLayout("grid");
}
};
return (
<div id="app-wrapper">
<h1>Product Showcase</h1>
<button onClick={toggleLayout}>Switch View</button>
<div className={`layout - $ { layout } `}>
<div className="item">Shoes</div>
<div className="item">Bags</div>
<div className="item">Accessories</div>
</div>
</div>
);
};App.css
.layout-grid {
display: flex;
flex-direction: row;
gap: 10px;
}
.layout-list {
display: flex;
flex-direction: column;
gap: 10px;
}
.item {
padding: 20px;
background-color: #f0f0f0;
border-radius: 5px;
}
button {
margin-bottom: 20px;
}Try out all these codes for yourselves and play around with them!
P.S. I’m still on hiatus but I use Medium and my blog to take and share my notes 😝💋🖤 These notes are inspired by me cramming the whole syllabus within 24 hours. LOL
Narrator: But this was a lie. CyCy never became an expert in React. She did become an expert in crying to ChatGPT, even though she was cheating on Him with DeepSeek AI, however.
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Implementing Dark Mode in React
We have previously talked about useState before. A great way to create CSS classes on the fly is to use state variable! Here is an example of how to create Dark Mode in React by using string interpolation to construct the individual classes based on the state variable mode. index.html index.jsx App.jsx App.css So, if…
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