window bind POPSTATE

Question

Given the following:

$(window).bind(\"popstate\", function() {
    alert(\'popstate\');
});

On first load, the alert fires with FireFox and

Answer 1

I convert @Nobu & @Tamlyn answers into an object, I also add a little fix by adding "window.history.state !== null". In some browsers the history.state exists, but it's null so the it was not working.

/**
 * The HTML5 spec was changed in 2011 to state popstate should not 
 * fired on page load. Chrome(34) & Firefox(4) has fixed the bug but 
 * some browsers (e.g. Safari 5.1.7) are still fire the popstate on
 * the page load. This object created from the Pjax Library to handle 
 * this issue.
 */
var popstatePageloadFix = {
	popped : ('state' in window.history && window.history.state !== null),
	initialUrl : location.href,
	initialPop : false,
	init : function() {
		this.initialPop = !this.popped && location.href == this.initialUrl;
		this.popped = true;
		return this.initialPop;
	}
};

$(window).on("popstate", function (event) {
	
	// Ignore initial popstate that some browsers fire on page load
	if ( popstatePageloadFix.init() ) return;
	
	...

});

Thanks @Nobu! Thanks @Tamlyn!