大约有 18,000 项符合查询结果（耗时：0.0246秒） [XML]
How to detect idle time in JavaScript elegantly?
Is it possible to detect " idle " time in JavaScript?
My primary use case probably would be to pre-fetch or preload content.
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Reading file contents on the client-side in javascript in various browsers
I'm attempting to provide a script-only solution for reading the contents of a file on a client machine through a browser.
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addEventListener vs onclick
...and IE's attachEvent)
Earlier versions of Internet Explorer implement javascript differently from pretty much every other browser. With versions less than 9, you use the attachEvent[doc] method, like this:
element.attachEvent('onclick', function() { /* do stuff here*/ });
In most other browser...
jQuery callback on image load (even when the image is cached)
...ld be the same time as the DOM version of the image finishes loading.
Javascript:
$(document).ready(function() {
var tmpImg = new Image() ;
tmpImg.src = $('#img').attr('src') ;
tmpImg.onload = function() {
// Run onload code.
} ;
}) ;
Updated (to handle multiple images an...
Executing elements inserted with .innerHTML
I've got a script that inserts some content into an element using innerHTML .
20 Answers
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check if jquery has been loaded, then load it if false
Does anyone know how to check if jquery has been loaded (with javascript) then load it if it hasnt been loaded.
10 Answers
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How to calculate md5 hash of a file using javascript
...calculate the MD5 hash of a file before the upload to the server using Javascript?
12 Answers
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Get image data url in JavaScript?
...image.
It would be something like this. I've never written a Greasemonkey script, so you might need to adjust the code to run in that environment.
function getBase64Image(img) {
// Create an empty canvas element
var canvas = document.createElement("canvas");
canvas.width = img.width;
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JQuery - $ is not defined
...
That error can only be caused by one of three things:
Your JavaScript file is not being properly loaded into your page
You have a botched version of jQuery. This could happen because someone edited the core file, or a plugin may have overwritten the $ variable.
You have JavaScript runni...
HTML5 Pre-resize images before uploading
...age">
<input id="input" type="file" onchange="handleFiles()">
<script>
function handleFiles()
{
var filesToUpload = document.getElementById('input').files;
var file = filesToUpload[0];
// Create an image
var img = document.createElement("img");
// Create a file r...