Updated waitUntilExists plugin

jquery.waituntilexists.js

;(function ($, window) {

var intervals = {};
var removeListener = function(selector) {

	if (intervals[selector]) {
		
		window.clearInterval(intervals[selector]);
		intervals[selector] = null;
	}
};
var found = 'waitUntilExists.found';

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

	var selector = this.selector;
	var $this = $(selector);
	var $elements = $this.not(function() { return $(this).data(found); });
	
	if (handler === 'remove') {
		
		// Hijack and remove interval immediately if the code requests
		removeListener(selector);
	}
	else {

		// Run the handler on all found elements and mark as found
		$elements.each(handler).data(found, true);
		
		if (shouldRunHandlerOnce && $this.length) {
			
			// Element was found, implying the handler already ran for all 
			// matched elements
			removeListener(selector);
		}
		else if (!isChild) {
			
			// If this is a recurring search or if the target has not yet been 
			// found, create an interval to continue searching for the target
			intervals[selector] = window.setInterval(function () {
				
				$this.waitUntilExists(handler, shouldRunHandlerOnce, true);
			}, 500);
		}
	}
	
	return $this;
};
 
}(jQuery, window));

jquery.waituntilexists.min.js

(function(e,f){var b={},g=function(a){b[a]&&(f.clearInterval(b[a]),b[a]=null)};e.fn.waitUntilExists=function(a,h,j){var c=this.selector,d=e(c),k=d.not(function(){return e(this).data("waitUntilExists.found")});"remove"===a?g(c):(k.each(a).data("waitUntilExists.found",!0),h&&d.length?g(c):j||(b[c]=f.setInterval(function(){d.waitUntilExists(a,h,!0)},500)));return d}})(jQuery,window);

• Further improved compressibility (by one byte) by passing "window" into the function.

see my BUGFIX https://gist.github.com/md55/6565078

Brandon: Could you please specify whether this code exists under a particular license or is in the public domain?

My additions of the code are public, but you'll have to look up the fork chain to see if there are any licenses encumbering the previous work.

Ok, thank you.

Can you add to your work an html working example with a delayed item?

Would it be possible to incorporate some further settings?

• Time length between attempts
• Number of maximum attempts
• Callback for timeout (max attempts tried without finding element)

I've left this code here for anyone to reference, but I no longer maintain or add features to it. You are more than welcome to.

Hello! Would you be so kind to provide a license? It would be really helpful for people which want to use it in enterprises.

Hey, great plugin! Do you mind providing a liscence with it? Would really help know when and where I can use it. Thanks!

Cool