How Can I Extract the Rotation Value from an Element's CSS Transform Using jQuery?

Retrieving Element Rotation Value using jQuery

In CSS, it's common to apply transformations to elements using the -moz-transform property. However, extracting the specific rotation value from this property using jQuery has been a challenge.

Question:

How to obtain the numerical rotation value applied to a specific HTML element through jQuery, despite it being stored within a complex matrix transformation string?

Answer:

This solution provides a jQuery function that extracts the rotation degrees from the -moz-transform property:

function getRotationDegrees(obj) {
    var matrix = obj.css("-webkit-transform") ||
    obj.css("-moz-transform")    ||
    obj.css("-ms-transform")     ||
    obj.css("-o-transform")      ||
    obj.css("transform");
    if(matrix !== 'none') {
        var values = matrix.split('(')[1].split(')')[0].split(',');
        var a = values[0];
        var b = values[1];
        var angle = Math.round(Math.atan2(b, a) * (180/Math.PI));
    } else { var angle = 0; }
    return (angle < 0) ? angle + 360 : angle;
}

Usage:

To retrieve the rotation value of the element with the class myDiv, use:

angle1 = getRotationDegrees($('#myDiv'));

For the last anchor within the element with the class mySpan, use:

angle2 = getRotationDegrees($('.mySpan a:last-child'));

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