Where to place jQuery.expr code?

Question

I'm looking for a solution to have a case-insensitive version of the :contains selector in jQuery. I found these two posts here on Stack Overflow:

Is there a case insensitive jQuery :contains selector?
How do I make jQuery Contains case insensitive, including jQuery 1.8+?

So basically the solution is this:

jQuery.expr[':'].Contains = function(a,i,m){ return jQuery(a).text().toUpperCase().indexOf(m[3].toUpperCase())>=0; };

My only question is how do I use this? Where to I specify this piece of code? I'm loading jQuery in my header and afterwards I load my script.js file where I have my DOM ready function declared. I put this piece of code outside the DOM ready function but it doesn't change anything in the behaviour of the :contains selector.

jcubic · Accepted Answer · 2013-06-11 11:32:30Z

If you put this piece of code after loading jquery, you will have one contains and one (case-insensitive) icontains selector:

$.extend($.expr[':'], { // case insensitive version of :contains icontains: function(a,i,m){ return (a.textContent||a.innerText||jQuery(a).text()||""). toLowerCase().indexOf(m[3].toLowerCase())>=0; } });

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