Call setTimeout without delay

Question

Quite often see in JavaScript libraries code like this:

setTimeout(function() {
    ...
}, 0);

I would like to know why use such a wrapper

Answer 1

When you want to execute rest of your code without waiting previous one to finish you need to add it in anonymous method passed to setTimeout function. Otherwise your code will wait until previous is done

Example:

function callMe()
{
   for(var i = 0; i < 100000; i++)
     {
       document.title = i;
     }
} 

var x = 10;
setTimeout(callMe, 0);

var el = document.getElementById('test-id');
el.innerHTML = 'Im done before callMe method';

That is the reason I use it.