What is the Best way to do Browser Detection in Javascript?

Question

In one of my Web Development classes we where asked to create a script that detects NE4,NE6+,IE4,IE6+ Browsers that display a compatable CSS script for each browser.

Answer 1

You'll want to use Conditionizr, which features robust test/detect add-ons for this: http://conditionizr.com

For example:

conditionizr.add('safari', [], function () {
    return /constructor/i.test(window.HTMLElement);
});