Calculate Distance Between Mouse and Element?

(function() { var mX, mY, distance, $distance = $(‘#distance span’), $element = $(‘#element’); function calculateDistance(elem, mouseX, mouseY) { return Math.floor(Math.sqrt(Math.pow(mouseX – (elem.offset().left+(elem.width()/2)), 2) + Math.pow(mouseY – (elem.offset().top+(elem.height()/2)), 2))); } $(document).mousemove(function(e) { mX = e.pageX; mY = e.pageY; distance = calculateDistance($element, mX, mY); $distance.text(distance); }); })();

This code will calculate the distance between the mouse cursor and the center of an element. This can be useful for triggering a function when the mouse is within a certain distance of an element. Or, you can base the value of a property, such as the width, height, or opacity of the element, on the proximity of the mouse cursor.