javascript swap class name code example

Example 1: change elements class javascript

document.getElementById("MyElement").classList.add('MyClass');

document.getElementById("MyElement").classList.remove('MyClass');

if ( document.getElementById("MyElement").classList.contains('MyClass') )
{
document.getElementById("MyElement").classList.toggle('MyClass');
}

Example 2: how to change class by is in js by toggle

<button class="" id="changeicon">
	<i id="slideshow" class="fas fa-hamburger"></i>
</button>

$("#changeicon").click(function() {
			$("#slideshow").toggleClass("fa-times");
		});