What is the best practice to not to override other bound functions to [removed]?

Question

How much I dig into JavaScript, I find myself asking that much. For example we have window.onresize event handler and if I say:

window.onresize          


        

Answer 1

Instead of replacing such a catch-all handler, you should just add a DOM 2 listener like this:

window.addEventListener("resize", myResizeFunction);

or in more details:

if (window.addEventListener) {    // most non-IE browsers and IE9
   window.addEventListener("resize", myResizeFunction, false);
} else if (window.attachEvent) {  // Internet Explorer 5 or above
   window.attachEvent("onresize", myResizeFunction);
}