javascript tutorial - [Solved-5 Solutions] Add a class - javascript - java script - javascript array
Problem:
How do we add a class to a given element?
Solution 1:
a element that already has a class:
<div class="someclass">
<img ... id="image1" name="image1" />
</div>
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Solution 2:
Add a space plus the name of your new class to the className property of the element. First, put an id on the element so you can easily get a reference.
<div id="div1" class="someclass">
<img ... id="image1" name="image1" />
</div>
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Then
var d = document.getElementById("div1");
d.className += " otherclass";
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Solution 3:
use element.classList.add
var element = document.getElementById("div1");
element.classList.add("otherclass");
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Solution 4:
target element "d" however you wish and then:
d.className += ' additionalClass'; //note the space
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Solution 5:
var a = document.body;
a.classList ? a.classList.add('classname') : a.className += ' classname';
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This is shorthand for the following..
var a = document.body;
if (a.classList) {
a.classList.add('wait');
} else {
a.className += ' wait';
}