How Can I Get the `-moz-transform:rotate` Value Using jQuery?

Getting the -moz-transform:rotate Value Using jQuery

This question addresses the challenge of extracting the current rotation value applied to an HTML element using jQuery. The provided CSS style includes multiple transform declarations with the same rotation angle value.

Answer:

The provided solution offers a function that retrieves the numerical rotation value applied to any HTML element, regardless of whether it uses the -webkit-, -moz-, -ms-, -o-, or standard transform property. Here's an overview of the approach:

1. Parse the transform matrix: The function first retrieves the value of the -webkit-transform property (or any of its variants) using the jQuery css() method. If the element has no rotation applied, it returns 'none'.
2. Extract the rotation angle: If the retrieved value isn't 'none', the function extracts the rotation angle using some matrix manipulation. It splits the matrix into its components, then calculates the angle using the atan2() function.
3. Handle negative angles: To ensure that the rotation angle is always positive, it applies an if-else check and adds 360 degrees if the angle is negative.
4. Return the rotation angle: The function returns the calculated rotation angle as a rounded integer.

Example Usage:

The provided JavaScript code showcases how to utilize the getRotationDegrees() function to retrieve rotation angles for specific HTML elements:

angle1 = getRotationDegrees($('#myDiv'));
angle2 = getRotationDegrees($('.mySpan a:last-child'));

This allows developers to retrieve the rotation angle applied to any element on a web page and use it for further calculations or logic.

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