大约有 47,000 项符合查询结果（耗时：0.0166秒） [XML]
Get image data url in JavaScript?
...= new Image();
img.setAttribute('crossOrigin', 'anonymous');
img.onload = function () {
var canvas = document.createElement("canvas");
canvas.width =this.width;
canvas.height =this.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(this, 0, 0)...
How to open a local disk file with JavaScript?
...;
if (!file) {
return;
}
var reader = new FileReader();
reader.onload = function(e) {
var contents = e.target.result;
displayContents(contents);
};
reader.readAsText(file);
}
function displayContents(contents) {
var element = document.getElementById('file-content');
elem...
Including a .js file within a .js file [duplicate]
...ocument.getElementsByTagName("head")[0].appendChild(x);
You may also use onload event to each script you attach, but please test it out, I am not so sure it works cross-browser or not.
x.onload=callback_function;
share
...
Resizing an iframe based on content
...ent. To do this, framed.html has an iframe with src='' specified. When its onload fires, it evaluates its own height, and sets the src of the iframe at this point to helper.html?height=N
There's an explanation here of how facebook handle it, which may be slightly clearer than mine above!
Code
In...
How to detect idle time in JavaScript elegantly?
...a JavaScript:
var inactivityTime = function () {
var time;
window.onload = resetTimer;
// DOM Events
document.onmousemove = resetTimer;
document.onkeypress = resetTimer;
function logout() {
alert("You are now logged out.")
//location.href = 'logout.html'
...
Checking if jquery is loaded using Javascript
...ame $() syntax.
Remove your $(document).ready() (use something like window.onload instead):
window.onload = function() {
if (window.jQuery) {
// jQuery is loaded
alert("Yeah!");
} else {
// jQuery is not loaded
alert("Doesn't Work");
}
}
...
How do I convert an existing callback API to promises?
...load() {
return new Promise(function(resolve, reject) {
window.onload = resolve;
});
}
You would then use the resulting promise like so:
load().then(function() {
// Do things after onload
});
With libraries that support deferred (Let's use $q for this example here, but we'll...
How to change the opacity (alpha, transparency) of an element in a canvas element after it has been
...ctx.restore();
If you need img to be loaded:
var img = new Image();
img.onload = function() {
ctx.save();
ctx.globalAlpha = 0.4;
ctx.drawImage(img, x, y);
ctx.restore()
};
img.src = "http://...";
Notes:
Set the 'src' last, to guarantee that your onload handler is called on all...
Load and execution sequence of a web page?
...RL.
When the parsing is ended and document is ready and loaded, the events onload is fired. Thus when onload is fired, the $("#img").attr("src","kkk.png"); is run. So:
Document is ready, onload is fired.
Javascript execution hits $("#img").attr("src", "kkk.png");
kkk.png is downloaded and loads int...
How to parse Excel (XLS) file in Javascript/HTML5
...rseExcel = function(file) {
var reader = new FileReader();
reader.onload = function(e) {
var data = e.target.result;
var workbook = XLSX.read(data, {
type: 'binary'
});
workbook.SheetNames.forEach(function(sheetName) {
// Here is your object
...