javascript document.getElementsByClassName compatibility with IE

Question

What is the best method to retrieve an array of elements that have a certain class?

I would use document.getElementsByClassName but IE does not support it.

Answer 1

You can't really replicate getElementsByClassName, because it returns a nodeList, and so its value is live, and updates with the document.

You can return a static Array of elements who share the same classnames- but it won't 'know'when the document changes.

(It won't take too many of these kind of things to make a library look svelte...)

function getArrayByClassNames(classes, pa){
    if(!pa) pa= document;
    var C= [], G;
    if(pa.getElementsByClassName){
        G= pa.getElementsByClassName(classes);
        for(var i= 0, L= G.length; i

//Example

var A= getArrayByClassNames('sideBar local')