Measure the position of the caret of a text input, relative to the page or to the input. No dependencies needed.

Demo

You can check out a nifty demo here.

Usage

var textarea = document.getElementById('#myTextarea');

var caret = new Caret(textarea)

textarea.onkeyup = function(event) {
  console.log(caret.position); // Prints out position object {x: int, y: int}
};