onload | 易学教程

onload in iframes not working, if iframe have non-html document in src (pdf or text)

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问题 I have iframe with onload handler: <iframe id="FrameForPrintVersion" src="" border="0" style="height:0; width:0; visibility:hidden;" onload = 'frameOnload()' > It works fine if i use html-pages as the source of the iframe, but not when i set src to any pdf document. Is it posible to handle when a PDF document was loaded in this case? 回答1: According to the W3C, the iframe tag does not support any event attributes. Although major browsers support it but can not be relied upon. If you really

How to jQuery slidedown once page has already been loaded

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I am having a timing issue when attempting to slide down my more info div. My desired functionality is that the div slidesdown from the top once the page has already been rendered. My problem is if I use $(document).ready().. the animation does not visibly occur. Here is my code: $(document).ready(function() { $(".MoreInfo").slideDown('slow'); }); If I strap it to some other element's click for example, it works beautifully. But I am not sure how to make it visibly slide down once the page has loaded. Thanks! I tried mixing and matching using: $(window).load(function() and $(document).ready

Checking for multiple images loaded

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I'm using the canvas feature of html5. I've got some images to draw on the canvas and I need to check that they have all loaded before I can use them. I have declared them inside an array, I need a way of checking if they have all loaded at the same time but I am not sure how to do this. Here is my code: var color = new Array(); color[0] = new Image(); color[0].src = "green.png"; color[1] = new Image(); color[1].src = "blue.png"; Currently to check if the images have loaded, I would have to do it one by one like so: color[0].onload = function(){ //code here } color[1].onload = function(){ /

Javascript onload not working [closed]

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This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center . Closed 6 years ago . I am using an external javascript file, which I am using to store all my javascript functions in. Next I am trying to call a function from the body, using the next line of code: <body onload="imageRefreshBig()"> The only thing that this function does is

Jquery img added through append() triggers onload twice

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问题 The code that produces the headache for me is rather simple: $(function(){ $("#test").append('<img onload="alert(\'hi\')" src="Image.jpg"/>'); }) I have the above code in my head and a div with id 'test' in the body. Now my problem is that the page produces two alerts when the image is loaded, but I expected it to produce only one as the 'onload' should be triggered only once- The way it happens when I add the image manually without any javascript.. See the fiddle I made at: http://jsfiddle

Can I check whether an image has already been loaded earlier using Javascript or jQuery?

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Consider the following image appended to the document : <img id="someimage" src="http://www.someimage.jpg"> None of the following will work if the image has already been loaded by the time these functions are called : document.getElementById('someimage').onload = function () { console.log('image just loaded'); }; nor $("#someimage").load(function () { console.log('image just loaded'); }); Is there a way around that ? i.e. a function that will not wait for the image to load but will check whether the image has already been loaded earlier? Thanks Check the complete property of DOM node: document

animate div height one after the other onload javascript

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I have managed to get the beginning of my animation working and now I want the rest to animate with a slight delay after each div height animation and its causing problems. I've tried using getElementsByClassName and that hasn't worked. I've posted my progress so far here in codepen. Tried using getElementsByClassName Tried using the .container div . <html> <head> <script> window.onload = function() { let box = document.getElementById('box') box.style.height = "100vh"; } </script> </head> <body> <div class="container" id="container"> <div class="box" id="box"> box1 </div> <div class="box" id=

possibility of jQuery document ready() function taking a very long time to execute

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My issue is that sometimes a piece of JavaScript (often Google Analytics) may take a very long time to load, although it's not important to the HTML be ready to be "traversed and manipulated". If I were to use the following code: $(document).ready(function () { $("p").text("The DOM is now loaded and can be manipulated."); }); would this mean that the <p> would not be populated till after something like Google Analytics is loaded? Something like Google Analytics is generally not required on most websites and I have often found that I am waiting for it to load. (I don't want to use onload

EJS access express variable in JS onload function

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I know you can get the value of variables in an ejs file like so, <h1><%= title %></h1> if i were to use the same title variable in a onload javascript function in the same ejs page, how would i use it . for instance <script> window.onload(){ var s = <%= title %> alert(s); } </script> this function produces a console error saying Uncaught syntax error: Unexpected identifier although I'm able to see the actual value of the variable To output it within a script, the result will need to be understood as code. Since you didn't note the value of title , I'll assume for the examples: res.render(

Animated GIF while loading page does not animate

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I have a page which is being generated serverside using asp.net (C#). It takes a while for the page to load as it has up to 100 iframes. I want to show a "please wait" animated gif while the page is loading, so I have the following: <style type="text/css"> #blackout { filter:alpha(opacity=70); -moz-opacity:0.7; opacity:0.7; position:absolute; background-color:#222233; z-index:50; left:0px; top:0px; right:0px; bottom:0px; width:102%; height:102%; } #loading { filter:alpha(opacity=100); -moz-opacity:1; opacity:1; position:fixed; text-align:center; background-color:#EEEEEE; top:50%; left:50%;