parent class and add element addclass
// html <div class="parentElm" id="addActive"></div>
// js
function toggleClass(){
// get the properties of an element
var element = document.getElementById("addActive");
// check if the element have class list
if (element.classList) {
// add active class if true
element.classList.toggle("active");
} else {
var classes = element.className.split(" ");
var i = classes.indexOf("active");
}
}
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