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typeof !== “undefined” vs. != null
I often see JavaScript code which checks for undefined parameters etc. this way:
11 Answers
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How to identify unused css definitions
...ed to check it didn't strip id's and classes with no style but are used as JavaScript selectors.
The below content is taken from http://unused-css.com/ so credit to them for recommending other solutions:
Latish Sehgal has written a windows application to find and remove unused CSS classes. I haven'...
How to do case insensitive string comparison?
How do I perform case insensitive string comparison in JavaScript?
22 Answers
22
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Biggest GWT Pitfalls? [closed]
...lem: GWT is a sledgehammer compared to something like jquery or just plain javascript. It takes a lot more setup to get it happening than just including a JS file.
Solution: Use libraries like jquery for smaller, simple tasks that are suited to those. Use GWT when you want to build something truly ...
What is a callback function?
...this, the service providers often design APIs using the callback pattern.
JavaScript supports callbacks very nicely e.g. with lambdas and closures. And there is a lot of activity in the JavaScript world, both on the browser as well as on the server. There are even JavaScript platforms being develop...
What is the difference between decodeURIComponent and decodeURI?
What is the difference between the JavaScript functions decodeURIComponent and decodeURI ?
7 Answers
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How to fix getImageData() error The canvas has been tainted by cross-origin data?
...into my canvas, and then submit the image data back into my server. All in javascript
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jQuery AJAX file upload PHP
... <input type="file" id="photo"><br/>
<script type="text/javascript" src="jquery-3.2.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(document).on('change','#photo',function(){
var property = document.getElementB...
force browsers to get latest js and css files in asp.net application
...he disk quite so much.
Here is the extension method:
public static class JavascriptExtension {
public static MvcHtmlString IncludeVersionedJs(this HtmlHelper helper, string filename) {
string version = GetVersion(helper, filename);
return MvcHtmlString.Create("<script type='...
How to get a cross-origin resource sharing (CORS) post request working
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I finally stumbled upon this link "A CORS POST request works from plain javascript, but why not with jQuery?" that notes that jQuery 1.5.1 adds the
Access-Control-Request-Headers: x-requested-with
header to all CORS requests. jQuery 1.5.2 does not do this. Also, according to the same quest...