Question

How to detect and respond to mouse drags?

(a) Registering a mouseover handler

(b) Releasing a mousedown handler

(c) Registering a mousedown handler

(d) Releasing a mouseover handler

I got this question in class test.

Question is taken from Text Events topic in chapter Document Object Model and Event Handling in Javascript of JavaScript

Answer 1

The correct choice is (c) Registering a mousedown handler

To elaborate: By registering a mousedown handler that registers a mousemove handler, you can detect and respond to mouse drags. Doing this properly involves being able to capture mouse events so that you continue to receive mousemove events even when the mouse has moved out of the element it started in.