Author: admin@master

Javascript Input type=”color” validation for form

Beginner level with Javascript and have a question regarding the input type color. I am trying to make the user choose the color black before proceeding with next page of the form. The default color is yellow. Could someone please help me with this and explain where I have gone wrong or missing something? And…

How to disable Chrome’s saved password prompt setting through JavaScript

google-chrome javascript jquery

Is there any way to manipulate Chrome settings with the help of JavaScript or jQuery? I want to disable the save password pop-up bubble using JavaScript. How to do this? Answer Now I am going to give answer on my own question. It can be done in both chrome as well as in mozilla fire fox. For Chrome First of

Codility – CountDiv JavaScript solution

javascript

I’m still a bit new to JavaScript so if anyone care to explain how to solve this small issue. Basically, i’m using different languages to solve codility training tasks. I’ve encountered small problem when working with java script, floating points. Here is the example of what I mean. Task in …

JavaScript, Matter.js: Increase radius of circle

javascript matter.js physics-engine

I have a small example script, where I have a circle (radius:40), which falls down to the ground. But when I increase its radius to 80 then, only the graphics of the circle seem to change, but not the physics: Answer My guess is that with your approach you also have to call World.add(engine.world, circle) aga…

Why does a named IIFE result in a ReferenceError outiside of it?

iife javascript

Why did I get “ReferenceError: Person is not defined” for the following code? Since function Person is run, it is first created. However, I cannot explain why it is not then recognized. My only thought is that IIFE ignores the name they are given. Answer You get the error because the name of a function create…

Validation for textbox by using checkbox

angularjs dom-events javascript

This is my code: This is my angularjs Code: In the above code when I click the Continue button, first check the checkbox checked or not after it will check enter the password or not. Answer Check Once Is it what you want or something else Remove alerts ands code what you want

Is there a way to create interfaces in ES6 / Node 4?

ecmascript-6 interface javascript node.js

ES6 is fully available in Node 4. I was wondering whether it includes a concept of interface to define method contracts as in MyClass implements MyInterface. I can’t find much with my Googling, but maybe there is a nice trick or workaround available. Answer Interfaces are not part of the ES6 but classes…

How to get name of datatable column?

datatables javascript jquery

I’m using DataTable 1.10.9 (from https://datatables.net). Columns for the datatable are defined at the initialization step in javascript and each column has a unique name, e.g.: I know I can get the column from the table by the name I’ve given it, but I can’t seem to find how to find a colum…

replace newline string literal – ‘n’ in javascript

javascript regex

I have string literal, n in a variable. I am trying to replace it with empty string. But it doesn’t work. value evaluates to the string literal – n. I expect no output from console.log. But it prints Empty line followed by a backward slash (for some reason, stack overflow has trimmed the empty lin…

Javascript Pangram Regex

javascript pangram regex

I am trying to write a REGEX to test for a PANGRAM. I can do it the traditional way, but cannot seem to solve it for more than 90% of my tests with a regular expression. Input: string Output: true || false Test Results so far. 6/10 /([a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z, s]+)/i 6/10 /[a-z]{1}/…