I want to add a class to body in HTML using Javascript using a button that executes a function, then remove it using another button. But I want to save that class, until the other button is pressed, using LocalStorage. I can do that without LocalStorage
$$('body').addClass('Class here');
But how with LocalStorage?
By using Storage.setItem to save, then Storage.getItem to retrieve, like this:
var className = "theclass";
// Put the class name into storage
localStorage.setItem('className', className);
// Retrieve the class name from storage
var retrievedClassName = localStorage.getItem('className');
$('body').addClass(retrievedClassName);
Here a working code with jquery:
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-3.1.1.min.js"></script>
</head>
<body class="">
<div class="form-group">
<button class="button">your button</button>
</div>
<script>
var className = "theclass";
jQuery('.button').on( 'click', function(){
localStorage.setItem('className', className);
jQuery('body').addClass(className);
});
// Retrieve the class name from storage
var retrievedClassName = localStorage.getItem('className');
jQuery('body').addClass(retrievedClassName);
</script>
</body>
</html>
And here without:
<html>
<head></head>
<body id="mybigbody" class="">
<div class="form-group">
<button id="button">your button</button>
</div>
<script>
var className = "theclass";
var body = document.getElementById("mybigbody");
document.getElementById('button').onclick = function(e) {
localStorage.setItem('className', className);
body.setAttribute("class", className);
e.stopPropagation();
}
// Retrieve the class name from storage
var retrievedClassName = localStorage.getItem('className');
if(retrievedClassName)
body.setAttribute("class", retrievedClassName);
</script>
</body>
</html>
var retrievedClassName = localStorage.getItem('className'); you can get from your local storage the class that you have saved with click in some precedent moment. So on retrievedClassName you have your class name. Now you must attach it to your body. Whit javascript without andy library you can do var body = document.getElementById("body"); body.setAttribute("class", retrievedClassName);