JavaScript Closures
Closures are function which ‘remember’ the environment in which they were created. A closure is a combination of a function and the lexical environment withi...
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let and const in ES6
ECMAScript 2015 or commonly called as ES6 specification of JavaScript introduced let and const
ES6 Arrow functions
Arrow functions are a more concise syntax for writing function expressions. They were introduced in ECMAScript 2015 (ES6). They are also called as lambda fun...
Difference between ReactJS prop vs state
Props Props are read only. Whether a component is defined as a function or a class, it must never modify its own props. All react component must act like pur...
Core concepts of Redux
Store
What are Functional components in React JS ?
The simplest way to define a component is to write a JavaScript function. The function accepts a single “props” object and returns a React element. Such comp...
What is a pure function ?
A pure function is a function which:
What is JavaScript Event Loop ?
JavaScript code runs single threaded. Javascript has a concurrency model based on an event loop. The event loop is in the heart of Node.js / Javascript - it...
Same origin policy in JavaScript
The same-origin policy restricts how a document or script loaded from one origin can interact with a resource from another origin.
Difference between JS Varaible that is null, undefined, undeclared
undeclared variables don’t even exist undefined variables exist, but don’t have anything assigned to them null variables exist and have null assigned ...