How to keep track of a position no matter what screen size is?
<p>I'm trying to make a widget that selects an area in the page using JavaScript but the issue is that when it saves the <code>X/Y</code> and <code>Width/Height</code>, it's actually only relevant to that screen size, so if we try to draw that selection on another user's computer, it'll go off the correct position.</p>

<p>On what to rely and how to keep track of an <code>x</code> and <code>y</code> position no matter what the user's screen size is?</p>
