Question

I am not sure if it does or does not. Some sites show using a contains in javascript but when I try it does not work.

I have

var userAgent = navigator.userAgent.split(';');

if (userAgent.contains("msie7") == true) {...}

I am trying to use the useragent to figure out if the user is running IE 8 in compatibility mode. So I want to check the userAgenet for msie7 & for the trident 4.0

So how could I check this array?

Answer 1

There is no native Array.prototype.contains in ES v3 ( most JS implementations ). There is an Array.prototype.indexOf available in Mozilla/Firefox and other modern JS engines which choose to adopt it.

You can use the code below to implement it on browsers/engines that dont have it: https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Objects/Array/indexOf

Then after assigning it you can do Array.prototype.contains = function(s) { return this.indexOf(s) !== -1 }