javascript add class
// getting the target element
var myElement = document.querySelector('#myElement');
// example for addding some-class to the element
myElement.classList.add('some-class');
// multiple classes can be added like this
myElement.classList.add('one-class', 'one-more-class');
// example for removing any class from the element
myElement.classList.remove('any-class');javascript add class to element
var someElement= document.getElementById("myElement");
someElement.className += " newclass";//add "newclass" to element (space in front is important)html add css class
<h2
class="city main">London</h2>
<h2 class="city">Paris</h2>
<h2
class="city">Tokyo</h2>Copyright © 2021 Codeinu
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