Using event.which to verify if the user pressed the spacebar doesn't work in Firefox

Question

I want a script to verify if the key pressed is \'spacebar\', keycode 32. I noticed that IE uses other function names.

I tried a lot of solutions found here and this

Answer 1

I've never had any problems with the following and I've used it in IE6 through IE9, Firefox 3.5-5 and Chrome from at least 9-13

function captureSpace (evt) {
    var e = evt || event;
    var code = e.keyCode || e.which;
    if (code === 32) {
        // Do your thing...
    }
}

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This uses a logical OR to basically say if evt is a falsy value then use the window.event

var e = evt || event;

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This uses a logical OR to assign the code for the key pressed in the same way

var code = e.keyCode || e.which;

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This gives you a true or false value if the code is exactly equal to the integer value of 32

(code === 32)

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I also suggest that you assign this to the key UP event.