Textarea X/Y caret coordinates - jQuery plugin [duplicate]

This question alre开发者_如何学Pythonady has answers here: How do I get the (x, y) pixel coordinates of the caret in text boxes? (2 answers) Closed 8 years ago.

I'm looking to get the X/Y coordinates of the caret within a textarea on key down. I've searched vigorously but without any luck whatsoever, it seems you can get the position, but not the on-screen X/Y coordinates.

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The only viable way of doing this, AFAIK:

1. Append the contents of the TEXTAREA to a DIV
2. Append the DIV to the DOM
3. Place a SPAN inside the DIV at the character offset of the caret.
4. Take the offset of the SPAN ($(span).offset()...) and minus the offset of the DIV (depending on whether you want the x/y coords relative to the textarea or the page)

Note: When copying the text from the TEXTAREA to the DIV, make sure to copy relevant CSS properties that may affect the offset (width, height, padding, margin, border, font-size, line-height etc.).

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I wrote this jQuery plugin for exactly that.