What is the difference between node.isSameNode(node1) and node === node1 in the DOM?

Question

var a = document.getElementById('a');
var b = document.getElementById('a');

a.isSameNode(b); // true
a === b; // true

What is the browser compatibility of each approach?

Answer 1

isSameNode was deprecated in DOM v4. Firefox dropped support in version 10. I believe other major browsers support it, for now.

The recommended approach is to use '==='