I have always wondered WHaT tHE HecK?!? is the difference between JScript and JavaScript. Answer Just different names for what is really ECMAScript. John Resig has a good explanation. Here’s the full version breakdown: IE 6-7 support JScript 5 (which is equivalent to ECMAScript 3, JavaScript 1.5) IE 8 s…
Highlight a word with jQuery
I basically need to highlight a particular word in a block of text. For example, pretend I wanted to highlight the word “dolor” in this text: How do I convert the above to something like this: Is this possible with jQuery? Edit: As Sebastian pointed out, this is quite possible without jQuery ̵…
How to create query parameters in Javascript?
Is there any way to create the query parameters for doing a GET request in JavaScript? Just like in Python you have urllib.urlencode(), which takes in a dictionary (or list of two tuples) and creates a string like ‘var1=value1&var2=value2’. Answer Here you go: Usage:
Best Javascript drop-down menu? [closed]
As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, …
Is there a benefit to defining a class inside another class in Python?
What I’m talking about here are nested classes. Essentially, I have two classes that I’m modeling. A DownloadManager class and a DownloadThread class. The obvious OOP concept here is composition. However, composition doesn’t necessarily mean nesting, right? I have code that looks something l…
How to show a spinner while loading an image via JavaScript
I’m currently working on a web application which has a page which displays a single chart (a .png image). On another part of this page there are a set of links which, when clicked, the entire page reloads and looks exactly the same as before except for the chart in the middle of the page. What I want to…
Getting the ID of the element that fired an event
Is there any way to get the ID of the element that fires an event? I’m thinking something like: Except of course that the var test should contain the id “aaa”, if the event is fired from the first form, and “bbb”, if the event is fired from the second form. Answer In jQuery event…
How do you remove all the options of a select box and then add one option and select it with jQuery?
Using core jQuery, how do you remove all the options of a select box, then add one option and select it? My select box is the following. EDIT: The following code was helpful with chaining. However, (in Internet Explorer) .val(‘whatever’) did not select the option that was added. (I did use the sam…
How do you automatically set the focus to a textbox when a web page loads?
How do you automatically set the focus to a textbox when a web page loads? Is there an HTML tag to do it or does it have to be done via Javascript? Answer If you’re using jquery: or prototype: or plain javascript: though keep in mind that this will replace other on load handlers, so look up addLoadEvent…
Why doesn’t JavaScript support multithreading?
Is it a deliberate design decision or a problem with our current day browsers which will be rectified in the coming versions? Answer JavaScript does not support multi-threading because the JavaScript interpreter in the browser is a single thread (AFAIK). Even Google Chrome will not let a single web page’s Jav…