In order to set a div containing a transparent text image as the highest z-index in my document, I picked the number 10,000 and it solved my problem. Previously I had guessed with the number 3 but it had no effect. So, is there a more scientific way of figuring out what z-index is higher than that of all of
Tag: javascript
Merge keys array and values array into an object in JavaScript
I have: And I’d like to convert it into this object: In Python, there’s the simple idiom dict(zip(keys,values)). Is there something similar in jQuery or plain JavaScript, or do I have to do this the long way? Answer Simple JS function would be: Of course you could also actually implement functions like zip, etc as JS supports higher order types
How to create a jQuery plugin with methods?
I’m trying to write a jQuery plugin that will provide additional functions/methods to the object that calls it. All the tutorials I read online (have been browsing for the past 2 hours) include, at the most, how to add options, but not additional functions. Here’s what I am looking to do: //format div to be a message container by calling
Getting the client’s time zone (and offset) in JavaScript
How can I gather the visitor’s time zone information? I need both: the time zone (for example, Europe/London) and the offset from UTC or GMT (for example, UTC+01) Answer Using getTimezoneOffset() You can get the time zone offset in minutes like this: The time-zone offset is the difference, in minutes, between UTC and local time. Note that this means that
Get selected value in dropdown list using JavaScript
How do I get the selected value from a dropdown list using JavaScript? Answer Given a select element that looks like this: Running this code: Results in: Interactive example:
Escaping double quotes in JavaScript onClick event handler
The simple code block below can be served up in a static HTML page but results in a JavaScript error. How should you escape the embedded double quote in the onClick handler (i.e. “xyz)? Note that the HTML is generated dynamically by pulling data from a database, the data of which is snippets of other HTML code that could have
Javascript / jQuery: How to prevent active input field from being changed?
how do I prevent the user to change the value in an input field (which contains a certain value to be copied into the clipboard) without using disabled=”true”? The text should be selected once the user clicks in the field (that’s working already) but entering anything should have no effect. Thanks Answer readonly in the html of the input is
JavaScript – href vs onclick for callback function on Hyperlink
I want to run a simple JavaScript function on a click without any redirection. Is there any difference or benefit between putting the JavaScript call in the href attribute (like this): vs. putting it in the onclick attribute (binding it to the onclick event)? Answer Putting the onclick within the href would offend those who believe strongly in separation of
Javascript event not being set correctly in closure when called cross frame
I have the following code in the top frame of a two frame page: This works on the original document load, but when I call this function from another frame (usually when only one frame reloads), the hook is set, but when the onkeydown function fires, it does not receive the appropriate arguments, instead evt == null. Full Code follows:
Get the element with the highest occurrence in an array
I’m looking for an elegant way of determining which element has the highest occurrence (mode) in a JavaScript array. For example, in the ‘apple’ element is the most frequent one. Answer This is just the mode. Here’s a quick, non-optimized solution. It should be O(n).