Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 1 year ago. Improve this question I am new to Jquery and ajax. I need to upload multiple images to server fol…
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Scaling HTML5 canvas width preserving w/h aspect ratio
I have a canvas element with dimensions of 979X482px and I’d like to have it stretch to fit the width of any given browser window, keeping the aspect ratio of width/hight 1 to 1, I want the height to scale relative to width of the canvas. Any suggestions as how to go about doing this with javascript/jQu…
Detect touchpad vs mouse in Javascript
Is there any way to detect if the client is using a touchpad vs. a mouse with Javascript? Or at least to get some reasonable estimate of the number of users that use touchpads as opposed to mice? Answer In the general case, there is no way to do what you want. ActiveX might allow you to see and examine
Random alpha-numeric string in JavaScript?
What’s the shortest way (within reason) to generate a random alpha-numeric (uppercase, lowercase, and numbers) string in JavaScript to use as a probably-unique identifier? Answer If you only want to allow specific characters, you could also do it like this: Here’s a jsfiddle to demonstrate: http:/…
Finding all indexes of a specified character within a string
For example, if I had “scissors” in variable and wanted to know the position of all occurrences of the letter “s”, it should print out 1, 4, 5, 8. How can I do this in JavaScript in most efficient way? I don’t think looping through the whole is terribly efficient Answer A simple …
Use a child element to drag a parent element
I want to make something like navigation bar that can move whole element, without allowing dragging anywhere on the parent entire element to control the dragging. For example: Dragging on a title bar drags the whole window that it is contained within, but dragging elsewhere on the window container does not dr…
What is the difference between “window.location.href” and “window.location.hash”?
I learned “window.location.hash” new and tried in my jquery code instead of “window.location.href” and both of them gave same results. Code is here : What is the difference between them? Answer For a URL like http://[www.example.com]:80/search?q=devmo#test hash – returns the part…
Changing button text onclick
When I click on myButton1 button, I want the value to change to Close Curtain from Open Curtain.HTML: Javascript: The button is displaying open curtain right now and I want it to change to close curtain, is this correct? Answer If I’ve understood your question correctly, you want to toggle between ̵…
jQuery: Select data attributes that aren’t empty?
I’m trying to select all elements that have a data-go-to attribute that is not empty. I’ve tried $(‘[data-go-to!=””]’) but oddly enough it seems to be selecting every single element on the page if I do that. Answer try UPDATE: For the sake of not leading anyone astray, this…
How to parse a date in format “YYYYmmdd” in JavaScript?
This is a noob question: How to parse a date in format “YYYYmmdd” without external libraries ? If the input string is not in this format I would like to get invalid Date (or undefined if it will be easier). Answer Usage: UPDATE: As Rocket said, months are 0-based in js…use this if month̵…