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Editorial Team
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Asked: 2026-06-04T06:01:45+00:00

What is the best way to bind Javascript events to my custom MVC controls?

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What is the best way to bind Javascript events to my custom MVC controls? My initial thought is to create the controls using Html Helpers which give them a CSS class that signifies what kind of control they are. Then, on document.ready, I’ll use jQuery to select all such controls by their class name and bind their events.

However, I’m concerned about the speed of selecting from the entire dom by class name. I’ve read (and experienced) how slow this can be, especially in IE8 which we need to target for this project.

I could select by IDs by creating a js file for each page, but I’d rather not do this, as it’s a complicated web app with lots of pages. I’d rather have one js file for each type of control that gets included in a view if the view contains at least one of that type of control.

Are CSS classes my best option? Any other ideas? I’m using MVC3.

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  1. Editorial Team

    My advice would be to try it out with classes and test the performance. If you are not satisfied, switch to IDs. I use class selectors all the time and don’t find them terribly slow in any browser. When you give jquery a context to search in, things are quite fast. For example:

    $('#controls .control').whatever();

    Or

    $('.control', '#controls').whatever();

    Sizzle is great at optimizing these things to be fast.

    Edit: Here is a good reference for jQuery performance tips in general (notice #5):
    http://net.tutsplus.com/tutorials/javascript-ajax/10-ways-to-instantly-increase-your-jquery-performance/

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