Event handler scope in Javascript

Question

This is probably an easy question but I can\'t figure out the best answer for it.

I have 10

elements on screen. Each of them has a cli

Answer 1

You only have one variable i in an outer scope shared by all your click handlers. You need to create a local variable i for each closure. This will work:

for ( var i = 0; i < 10; i++ ) {
    var element = document.getElementById( "element" + i );
    element.onclick = (function(i){
        // returns a new function to be used as an onclick handler
        return function () {
            alert( "Element " + i );
        }
    })(i); // Pass in the value of the outer scope i
}

Check "The Infamous Loop" problem in this article (and read the whole artice) for more information :)