jQuery plugin which runs handler function once specified element is inserted into the DOM

jquery.waituntilexists.js

(function ($) {

/**
* @function
* @property {object} jQuery plugin which runs handler function once specified element is inserted into the DOM
* @param {function} handler A function to execute at the time when the element is inserted
* @param {bool} shouldRunHandlerOnce Optional: if true, handler is unbound after its first invocation
* @example $(selector).waitUntilExists(function);
*/

$.fn.waitUntilExists	= function (handler, shouldRunHandlerOnce, isChild) {
	var found	= 'found';
	var $this	= $(this.selector);
	var $elements	= $this.not(function () { return $(this).data(found); }).each(handler).data(found, true);
	
	if (!isChild)
	{
		(window.waitUntilExists_Intervals = window.waitUntilExists_Intervals || {})[this.selector] =
			window.setInterval(function () { $this.waitUntilExists(handler, shouldRunHandlerOnce, true); }, 500)
		;
	}
	else if (shouldRunHandlerOnce && $elements.length)
	{
		window.clearInterval(window.waitUntilExists_Intervals[this.selector]);
	}
	
	return $this;
}

}(jQuery));

I forked and improved on your code a bit, if you want to pull in some or all of my changes. Thanks!

Thanks a lot!

Thanks!!!! Immediately solved the problem

Thanks !!

Thank you so much, this solved a very large headache for me!

Brilliant and easy! Thank you for this.

Thank You for this great piece of code !

I love you. Not a pretty fix in my case but it does the trick.

Thank you so much! That's perfect!

Exactly what I'm looking for.

Just had to stop by and say Thanks man, this is the only plugin that worked for me, nice clean, simple.. Good work

This is not working anymore in Jquery3, because the .selector function was removed.

Any suggestion for Rails 5?