onload | 易学教程

Can I call $(document).ready() to re-activate all on load event handlers?

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Does anyone happen to know IF and HOW I could re-call all on-load event handlers? I'm referencing some .js files that I DON'T have control over, and these .js libraries do their initialization in $(document).ready(), and unfortunately don't provide any easy function to re-initialize. I'm currently trying to replace a large div block with content from an ajax call, and so I have to re-initialize the external libraries. So, it would be nice just to call $(document).ready() in order to re-initialize EVERYTHING. So far, I've tried this on the ajax call: success: function(data) { alert('1'); //

Jquery .ready() vs window.onload [duplicate]

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This question already has an answer here: window.onload vs $(document).ready() 15 answers Are there any advantages of using the Jquery ready() function over window.onload? // Jquery ready $(document).ready(function() { }); // window.onload window.onload = function () { } Depends on what you want to do. jQuery ready will run your code when the HTML is all ready, but before images and other resources have finished. This is the earliest possible time that you can change the DOM with JavaScript, so it's widely used. (In modern browsers it's replaced by the native event DOMContentLoaded ). window

Which JS event is fired when Chrome gets the download file?

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问题 I am having a problem with onLoad event of an iframe on Google Chrome. I created an iframe and set value for its "src" attribute to get a file from server. While server is processing, a waiting box is displayed until client gets the returned file. I tried to use the onLoad event of iframe to detect when client get the file to turn off that waiting box, but on Google Chrome that event handler does not work. With Firefox, when client gets a file, a "Save to" popup will be displayed

Setting focus on an HTML input box on page load

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I'm trying to set the default focus on an input box when the page loads (example: google). My page is very simple, yet I can't figure out how to do this. This is what I've got so far: <html> <head> <title>Password Protected Page</title> <script type="text/javascript"> function FocusOnInput() { document.getElementById("PasswordInput").focus(); } </script> <style type="text/css" media="screen"> body, html {height: 100%; padding: 0px; margin: 0px;} #outer {width: 100%; height: 100%; overflow: visible; padding: 0px; margin: 0px;} #middle {vertical-align: middle} #centered {width: 280px; margin

Form constructor vs Form_Load [duplicate]

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This question already has an answer here: What setup code should go in Form Constructors versus Form Load event? 2 answers Whats the difference between a form constructor and the form_Load method? Whats your though process for placing items in one vs the other? Code in the constructor runs immediately when you create the form, whether or not you ever display it. Code running in the Form.Load event is an event handler, so you can actually have code in other classes (which have subscribed to the form) run code there. Similarly, you can (from the form) use the Form.OnLoad method to run code. The

Javascript multiple Dynamic Insertion

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When we do dynamic insertion for javascript, sometimes order matters. We sometimes solve this by using onload property; however, if there are many external javascripts, and those scripts has to be loaded in order, then what should we do? I solved this problem by recursively defined onload functions; however not so sure about efficiency... since this is a script, I think it does lazy eval.... Any help? //recursively create external javascript loading chain //cautiously add url list according to the loading order //this function takes a list of urls of external javascript function loadScript(url

window.onload equivalent for Ajax applications?

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I'm using window.onload to call my JavaScript code that has to be executed after the page is fully loaded. From what I read this is the recommended method to call such scripts. However, it does not work for some Ajax sites, www.bing.com for instance - window.onload is called before the pages is fully rendered. Any suggestions? The short answer is that there's no general way to solve this problem (right now). The definition of a "page" is pretty fungible when AJAX comes into play - it's pretty hard to tell the difference between AJAX that is intended to be part of the initial page load, and

window.load doesn't fire always on chrome?

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I have this userscript: // ==UserScript== // @name test // @namespace test // @description show's an alert on load // @include http://* // @include https://* // ==/UserScript== window.addEventListener('load', function(){alert("loaded");}, false); This works fine on Firefox on all pages but doesn't work at all on Chrome at some occasions. One example is this website: http://lexin.nada.kth.se/lexin/ Entering the link in the address and hitting enter, loads the page normally but no alert is popped up. If you press F5 to refresh the page, the popup appears. Is there some explanation to this weird

Why not use javascript handlers on the body element?

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As an answer to the question of 'How do you automatically set the focus to a textbox when a web page loads?' , Espo suggests using <body onLoad="document.getElementById('<id>').focus();"> Ben Scheirman replies (without further explanation): Any javascript book will tell you not to put handlers on the body element like that Why would this be considered bad practice? In Espos answer, an 'override' problem is illustrated. Is this the only reason, or are there any other problems? Compatibility issues? Using onLoad is becoming less and less common because callbacks can't be stacked using this

Is the 'onload' necessary when the code is at the bottom?

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I was wondering if the window.onload = function(){} (or any other kind of onload, like the jQuery $(document).ready(); is necessary if the code is placed at the bottom of my <body> ? Or there could be highly unexpected side-effects? Yes, there could be unexpected consequences. But, no, it's not absolutely necessary. The timing could be off for things still loading, like complicated layouts, deep DOM structures, dynamic HTML from other scripts, or images. To avoid these situations, it's always safest to wrap your script in an onload event. Here are some examples that demonstrate this. All