Closures in JavaScript, a concept you would never skip before going for a JS interview. If you don't know what this term means, let me brief you on the same. A proper definition of closure could look something like this: A Closure in JavaScript is a...
In the web world, technologies and functionalities are getting updated rapidly. But that doesn't necessarily mean that our browser is ready to serve us every new functionality. But one doesn't have to sacrifice using the latest features in your appli...
If you're a JavaScript developer, you might have come across the word "prototype". But have you come across "__proto__"? If yes, ever wondered what's the difference? If not, let me fill you in. Prototype It is an object that contains certain propert...
Did you know that JavaScript allocates memory to all variables and functions first, even before executing the code? Yes, that's true. And this results in a phenomenon called "hoisting" in JavaScript. Hoisting allows us to use variables and functions ...
JavaScript's strict mode, introduced in ECMAScript 5, optimizes code for JS engine, eliminates bad-syntax code, and helps in writing secure JavaScript. Let's take a slightly deeper dive into this concept. "Use strict" mode in JS applies certain restr...
The behavior of this keyword in different contexts can be very confusing for a JavaScript developer. Here is some must-know information regarding the same. First things first, what exactly is this? This is a keyword that references the object that is...
"Primitive" and "reference" values in JavaScript, a concept most developers skip as it seems to be too theoretical, actually became quite important when I was learning React. If you don't know about this, let me quickly summarize the concept. In JS, ...
While learning JS, I've always wondered how == and === are different from each other, and how exactly do they work BTS. So here's what I got to know. The equality operator (==) uses the Abstract Equality Comparison Algorithm to compare two operands....
Do you really know the difference between "null" and "undefined" in JavaScript? If not, let me explain. Undefined In JavaScript, undefined means a variable has been declared but has not yet been assigned a value. For example: X is like a new team mem...