This is just a quick little function I find pretty useful. It allows you to round any number to an arbitrary value, and can be useful for when you’re working with and rendering to a grid or want a slider that increments by a certain step.

if(typeof Math.roundTo === "undefined") {

Math.roundTo = function(num, step) {

return Math.floor((num / step) + .5) * step;

}

}

Math.roundTo(15, 10); // >> 20

Math.roundTo(14.99, 10); // >> 10

Math.roundTo(42, 1); // >> 42

As you can see, it’s pretty straightforward. Just pass in the number you want to round, and the step you want it rounded to and voilá, you’re good to go.

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Thanks, just want I was looking for.Keep up the good work. I found a lot of nice tips and tricks.