function name() {
const select = document.querySelector("#id");
select.classname = ("customclass")
}
I've written this code. But I'm unable to change the Classname.
You need to change the className
property:
const select = document. querySelector("#id");
select.className = "customclass";
console.log(select);
<div id="id"></div>
Another way would be adding it to the classList
as suggested in the comments:
const select = document. querySelector("#id");
select.classList.add("customclass");
console.log(select);
<div id="id"></div>