Question

Say a div has this applied to it:

-webkit-transform: translate3d(0px, -200px, 0px)

How could I retrieve those values with jQuery?

Answer 1

The value gets stored either as a matrix or a matrix3d, depending on whether or not the z value was set. Assuming no other transformations, for a 2D matrix, X and Y are the last two values. For a 3D matrix, X, Y, Z, 1 are the last four digits.

You could use a regular expression to get the values:

function getTransform(el) {
    var results = $(el).css('-webkit-transform').match(/matrix(?:(3d)\(\d+(?:, \d+)*(?:, (\d+))(?:, (\d+))(?:, (\d+)), \d+\)|\(\d+(?:, \d+)*(?:, (\d+))(?:, (\d+))\))/)

    if(!results) return [0, 0, 0];
    if(results[1] == '3d') return results.slice(2,5);

    results.push(0);
    return results.slice(5, 8);
}