HTML Local Storage Dark Mode Using JavaScript

Question

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>

Answer 1

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

HTML Local Storage Dark Mode Using JavaScript

Question

1 answers

solution1
2 ACCPTED 2020-08-28 14:14:55

HTML Local Storage Dark Mode Using JavaScript

Question

1 answers

solution1 2 ACCPTED 2020-08-28 14:14:55

solution1
2 ACCPTED 2020-08-28 14:14:55