I have been evaluating a lot of different client-side JS template engines (doT, parrot, dust.js, microtemplating, underscore, etc). They all work similarly, using some type of tags to represent data, and with some giving the ability to embed pure JS into the template, including loops, if/then, etc. However, t…
Author: admin@master
JS Set background image of span
JS: HTML: I was wondering if it would be possible to also set the source of an image in this HTML from my Javascript code. So if I get “Item One” it will display that image in my HTML? Answer You just need to create an array containing the paths to your images such as var images = [“image1.p…
PURE JS get selected option data attribute value returns Null
I have this html: and js but it always alerts null instead of data value Where is the problem guys? Thanks Answer The problem is that you get select element and not selected option element as function argument. And it does not have the data attribute. You have to get the option attribute like so: Notice that …
HTML5 Canvas Javascript how to make smooth brush
Hello i need make smooth brush likes this: I try to create it, i make circle and fill it, but result not successful: Can be seen circles.. this is not smooth like first example my example code: http://codepen.io/anon/pen/NPjwry Answer Try with a smaller globalAlpha and decrease the stepping (so you draw more …
Can a Chrome extension’s content script guarantee that a DOM event was user-initiated?
I have an extension injecting HTML elements into pages and watching for click events on those elements. I want to be sure that any given click event came from a user action, rather than JS on the page creating and dispatching a click event. Is there a way of doing so? Answer You’re looking for event.isT…
Document element click() method not triggering in ionic angular app
I have an angular ionic cordova app where I’m trying to trigger the click of an input from another span (so that I can trigger the native datetime keyboard in cordova) . However the click event doesn’t seem to be triggered on the input field. Looking at the debugger, the click function of the docu…
Capture JavaScript events “silently”
I am currently implementing a JavaScript framework. Here, I want to capture mouse and touch events on the page without other event handling being disturbed. For example: DOM: JS (with jQuery): The gesture detection is done with onStart, onMove and onEnd. The problem occurs with code such as this: This event i…
Find all lowercase and uppercase combinations of a string in Javascript
I am looking for this stackoverflow question to be answered in Javascript. So if my input is “word”, the function should return: word, Word, wOrd, WOrd, woRd, WoRd, etc.. here’s what i have so far but it only produces the permutations (doesn’t capitalize anything) Answer One option wou…
What is the difference between state and props in React?
I was watching a Pluralsight course on React and the instructor stated that props should not be changed. I’m now reading an article (uberVU/react-guide) on props vs. state and it says Both props and state changes trigger a render update. Later in the article it says: Props (short for properties) are a C…
Converting base64 to blob in javascript
I tried to convert a JPEG’s base64 string to a blob on a Cordova/hybrid app running on iOS 8 using the following function b64toBlob. However it’s giving an error when we do How can be work around this error? Answer Try this out. Please note that dataURI is assumed to include base64 prefix. (e.g. &…