How can you determine if a css class exists with Javascript?

Question

Is there a way to determine whether or not a css class exists using JavaScript?

Answer 1

Add this Condition Above

if (!document.getElementsByClassName('className').length){
    //class not there
}
else{
//class there
}

If want to check on a element Just use

element.hasClassName( className );

also you can use on a ID

document.getElementById("myDIV").classList.contains('className');

Good Luck !!!