javascript – shuffle HTML list element order

by 
var ul = document.querySelector('ul');
for (var i = ul.children.length; i >= 0; i--) {
    ul.appendChild(ul.children[Math.random() * i | 0]);
}

This is based on Fisher–Yates shuffle, and exploits the fact that when you append a node, it’s moved from its old place.

Performance is within 10% of shuffling a detached copy even on huge lists (100 000 elements).

http://jsfiddle.net/qEM8B/

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