onload

Using Javascript FileReader with huge files

由 拥有回忆 提交于 2019-12-17 18:42:04
问题 I have a problem using the Javascript FileRead trying to read huge files. For example, I have a text file of 200mb and everytime I read this file the code stops working. Its possible to read the text file, but for example ONLY the first 10 lines or stop reading after 10mb? This is my code: var file = form.getEl().down('input[type=file]').dom.files[0]; var reader = new FileReader(); reader.onload = (function(theFile) { return function(e) { data = e.target.result; form.displayedData=data; }; })

Async-loaded scripts with DOMContentLoaded or load event handlers not being called?

由 杀马特。学长 韩版系。学妹 提交于 2019-12-17 17:37:29
问题 I've got a script with a DOMContentLoaded event handler— document.addEventListener('DOMContentLoaded', function() { console.log('Hi'); }); Which I'm loading asynchronously— <script async src=script.js></script> However, the event handler is never called . If I load it synchronously— <script src=script.js></script> It works fine. (Even if I change the DOMContentLoaded event to a load event, it's never called.) What gives? The event handler should be registered irrespective of how the script is

jQuery: How to check when all images in an array are loaded?

由 回眸只為那壹抹淺笑 提交于 2019-12-17 14:22:48
问题 I have an array of images (the exact number of images varies), and when they all load I want some code to execute. I tried this but it doesn't work: myImgArray.load(function(){ alert('loaded'); }); I get 33: Uncaught TypeError: Object [object Object],[object Object],[object Object],[object Object] has no method 'load' I don't think a for loop or something similar would work because the images might, and probably will, load in 'random' order. 回答1: The only way I know of to do it is to attach a

window.onload seems to trigger before the DOM is loaded (JavaScript)

由 自古美人都是妖i 提交于 2019-12-17 11:52:15
问题 I am having trouble with the window.onload and document.onload events. Everything I read tells me these will not trigger until the DOM is fully loaded with all its resources, it seems like this isn't happening for me: I tried the following simple page in Chrome 4.1.249.1036 (41514) and IE 8.0.7600.16385 with the same result: both displayed the message "It failed!", indicating that myParagraph is not loaded (and so the DOM seems incomplete). <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"

javascript - document.write error?

由 让人想犯罪 __ 提交于 2019-12-17 07:51:32
问题 Consider the script.. <html> <head> <script type="text/javascript"> document.write('TEST'); </script> </head> <body> Some body content ... </body> </html> This works fine and the word 'TEST' is added to the <body> But when <script type="text/javascript"> window.onload = function(){ document.write('TEST'); } </script> is used, then the body content is fully replaced by the word 'TEST' i.e, the old body contents are removed and ONLY the word 'TEST' is added. This happens only when document

javascript - document.write error?

由 微笑、不失礼 提交于 2019-12-17 07:51:24
问题 Consider the script.. <html> <head> <script type="text/javascript"> document.write('TEST'); </script> </head> <body> Some body content ... </body> </html> This works fine and the word 'TEST' is added to the <body> But when <script type="text/javascript"> window.onload = function(){ document.write('TEST'); } </script> is used, then the body content is fully replaced by the word 'TEST' i.e, the old body contents are removed and ONLY the word 'TEST' is added. This happens only when document

Difference between onload() and $.ready?

由 ∥☆過路亽．° 提交于 2019-12-17 06:28:50
问题 Can you list the difference between onload() and $(document).ready(function(){..}) functions in the using jQuery? 回答1: the load event (a.k.a "onload") on the window and/or body element will fire once all the content of the page has been loaded -- this includes all images, scripts, etc... everything. In contrast, jquery's $(document).ready(...) function will use a browser-specific mechanism to ensure that your handler is called as soon as possible after the HTML/XML dom is loaded and

Cannot set property 'innerHTML' of null

由 风格不统一 提交于 2019-12-17 03:35:30
问题 Why do I get an error or Uncaught TypeError: Cannot set property 'innerHTML' of null? I thought I understood innerHTML and had it working before. <!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Untitled Document</title> <script type ="text/javascript"> what(); function what(){ document.getElementById('hello').innerHTML = 'hi'; }; </script> </head> <body> <div id="hello"></div> </body> </html> 回答1: You have to place the hello div before

How to run a function when the page is loaded?

由 可紊 提交于 2019-12-16 19:59:12
问题 I want to run a function when the page is loaded, but I don’t want to use it in the <body> tag. I have a script that runs if I initialise it in the <body> , like this: function codeAddress() { // code } <body onLoad="codeAddress()"> But I want to run it without the <body onload="codeAddress()"> and I have tried a lot of things, e.g. this: window.onload = codeAddress; But it is not working. So how do I run it when the page is loaded? 回答1: window.onload = codeAddress; should work - here's a

How to run a function when the page is loaded?

由 蹲街弑〆低调 提交于 2019-12-16 19:58:26
问题 I want to run a function when the page is loaded, but I don’t want to use it in the <body> tag. I have a script that runs if I initialise it in the <body> , like this: function codeAddress() { // code } <body onLoad="codeAddress()"> But I want to run it without the <body onload="codeAddress()"> and I have tried a lot of things, e.g. this: window.onload = codeAddress; But it is not working. So how do I run it when the page is loaded? 回答1: window.onload = codeAddress; should work - here's a
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