Answers for "document.class name javascript"

javascript get class name

document.getElementById("myDIV").className = "mystyle";

javascript document object model getElementsByClassName

document.getElementsByClassName('test')

how to get class name of element in javascript

var spans = document.getElementsByTagName("span");
for (var i = 0; i < spans.length; i++) {
    if (spans[i].className == 'xyz') {
        spans[i].style.backgroundColor = '#000';
    }
}