Get All Elements in an HTML document with a specific CSS Class

Question

What\'s the best way to get an array of all elements in an html document with a specific CSS class using javascript?

No javascript frameworks like jQuery allowed her

Answer 1

If you want to do something for all the element with same id in a document. Although simple but sometime mind dont give green signals

var x = document.getElementById(elementid);
while(x){
document.removechild(x);
x = document.getElementById(elementid);
}