I have a contenteditable div I want users to type in. When users type inside the box with onkeyup, I activate a function that changes the color of certain characters: What this code does is it takes every < sign and every > sign and turns it into a gold color. However, when I do this, I am no longer
Author: admin@master
Bug reporter: Alternatives to getDisplayMedia?
I am trying to implement a bug reporter on my website. My goal is that the user will be able to describe the problem audibly and record the browser tab while walking through the problem. The bug report will then just be a video file, which can be emailed to me. It appears that the proposed navigator.mediaDevi…
What does ||| mean in JavaScript?
I’ve googled this and searched through the JavaScript documentation but I can’t find any mention of this operator: a |ǀ| b When I try the operator on its own I get an error but when I run the following code it runs perfectly fine: Changing the values of a and b would suggest it works like || but I…
TypeScript & React – one onChange Handler for multiple input fields
Say I have a form with multiple input fields. In normal ES6/React I would create a single method that all input fields would point their onChange handlers to. Something like this: This helps in the case where you have a lot of form elements and don’t have to create a specific method to handle each of th…
How to throw an error inside of a call back, and catch it outside
Intro Inside of this jQuery(document).ready() function, inside the anonymous function, I am throwing an error which gets caught inside of the second catch block. Then I am throwing an error inside of that catch block AND trying to catch it outside in the first try catch block. Questions. Is this possible? BRO…
Static Methods and Angular 2 Services in JavaScript ES6
While coding an app with Angular 2 and multiple calculation services I faced the following questions: When do I use static in a Angular service provided on application level? Is that nonsense? How does a static method reflect on performance? Lets say a couple hundret objects call at the same time the same sta…
Vue $route is not defined
I’m learning Vue router. And I want to made programmatic navigation without using <router-link> in templates file. My router and view: So by default I push to ‘allVideos’ route and inside that component I have a button and method for redirecting to ”editVideo’ button: metho…
Optimizing native hit testing of DOM elements (Chrome)
I have a heavily optimized JavaScript app, a highly interactive graph editor. I now started profiling it (using Chrome dev-tools) with massive amounts of data (thousands of shapes in the graph), and I’m encountering a previously unusual performance bottleneck, Hit Test. This takes up 65% of everything (…
Javascript: Retrieve all keys from sessionStorage?
Is it not posssible to retrieve all keys/objects that I stored in sessionStorage (or localStorage)? If I have done sessionStorage.name = ‘John’ and sessionStorage.city = ‘New York’, isn’t there a way to get a list that shows the keys name and city? Answer to get a list that shows…
vue JS not propagating changes from parent to component
I am pretty new to Vue Framework. I am trying to propagate the changes from parent to child whenever the attributes are added or removed or, at a later stage, updated outside the component. In the below snippet I am trying to write a component which shows a greeting message based on the name attribute of the …