I tried to make a complete darkmode to my website. It’s almost done, but I have an issue. When I reload the page the dark mode goes back to the default light mode. How can I sovle this problem? I tried some code but it didn’t work. I want to use Local Storage, but I don’t know how to add it to my code. Can someone help me with this? Here is my sample code:
function darkmode() {
var element = document.body;
element.classList.toggle("dark-mode");
}<html>
<head>
<style>
.card {
background-color: red;
color: green;
}
.dark-mode .card {
background-color: black;
color: white;
}
</style>
</head>
<body>
<button onclick="darkmode()">DARK MODE</button>
<div class="card">
<h2>Title</h2>
<div class="fkimg" style="height: 100px; width: 20%;">IMAGE</div>
<a>Some text</a>
</div>
</body>
</html>Advertisement
Answer
For your sample code, it seems like the best approach would be to add something to the darkmode function:
function darkmode() {
// all values retrieved from localStorage will be strings
const wasDarkmode = localStorage.getItem('darkmode') === 'true';
localStorage.setItem('darkmode', !wasDarkmode);
const element = document.body;
element.classList.toggle('dark-mode', !wasDarkmode);
}
function onload() {
document.body.classList.toggle('dark-mode', localStorage.getItem('darkmode') === 'true');
}
<html> <head>...</head> <body onload="onload()"> ... </body> </html>
MDN localStorage reference: https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage