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How can I convert an image into Base64 string using JavaScript?
...ction toDataURL(url, callback) {
var xhr = new XMLHttpRequest();
xhr.onload = function() {
var reader = new FileReader();
reader.onloadend = function() {
callback(reader.result);
}
reader.readAsDataURL(xhr.response);
};
xhr.open('GET', url);
xhr.responseType...
check if jquery has been loaded, then load it if false
... appending it to the header. Otherwise you'll have to wait for the window.onload event, which is slower if the page has images. Here's a sample script which checks if the JQuery file has loaded, since you won't have the convenience of being able to use $(document).ready(function...
http://neighbo...
img src SVG changing the styles with CSS
...n open source library called SVGInject that does this for you. It uses the onload attribute to trigger the injection.
Here is a minimal example using SVGInject:
<html>
<head>
<script src="svg-inject.min.js"></script>
</head>
<body>
<img src="ima...
Difference between $(window).load() and $(document).ready() functions
...ements are there to be found/used, but not necessarily all content.
window.onload fires later (or at the same time in the worst/failing cases) when images and such are loaded, so if you're using image dimensions for example, you often want to use this instead.
...
Check if an image is loaded (no errors) with jQuery
...
Another option is to trigger the onload and/or onerror events by creating an in memory image element and setting its src attribute to the original src attribute of the original image. Here's an example of what I mean:
$("<img/>")
.on('load', func...
Why is document.body null in my javascript?
... section that uses body. Not cool.
You want to wrap this code in a window.onload handler or place it after the <body> tag (as mentioned by e-bacho 2.0).
<head>
<title>Javascript Tests</title>
<script type="text/javascript">
window.onload = function() {
...
Check whether user has a Chrome extension installed
...();
img.src = "chrome-extension://" + extensionId + "/test.png";
img.onload = function() {
callback(true);
};
img.onerror = function() {
callback(false);
};
}
Of note: if there is an error while loading this file, said network stack error will appear in the console with no ...
Dynamically add script tag with src that may include document.write
...
There is the onload function, that could be called when the script has loaded successfully:
function addScript( src,callback) {
var s = document.createElement( 'script' );
s.setAttribute( 'src', src );
s.onload=callback;
documen...
Smallest data URI image possible for a transparent image
...
data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'/%3E
The final length depends on what it's gzipped with.
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improve this ans...
.prop() vs .attr()
...ween HTML attributes and DOM properties.:
HTML Attributes
Syntax:
<body onload="foo()">
Purpose:
Allows markup to have data associated with it for events, rendering, and other purposes.
Visualization:
The class attribute is shown here on the body. It's accessible through the following code:
v...