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Nullish coalescing and optional chaining Explained!

Feb 24, 2023 · 2 min read · In JavaScript, there are two operators - nullish coalescing and optional chaining. Nullish coalescing is used to check whether a value is nullish or not. The Optional Chaining Operator is there to safely call upon a variable or function without knowi...

Anonymous function in JavaScript

Feb 13, 2023 · 3 min read · Anonymous function is a function that does not have any name associated with it. Normally we use the function keyword before the function name to define a function in JavaScript, however, in anonymous functions, we use only the function keyword witho...

Difference Between "==" and "===" in javaScript

Feb 12, 2023 · 4 min read · The equality operator in javascript is used to compare if two values are equal. The comparison is made by == and === operators in javascript. Double Equal (==) Operator: The double equal('==') operator tests for abstract equality i.e it does the type...

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TypeError vs ReferenceError

Feb 12, 2023 · 3 min read · Errors occur when the JavaScript engine is parsing a script and encounters syntactically invalid code. JavaScript will throw an exception (throw an error). JavaScript will create an Error object with two properties: name and message. Let's look at tw...

KKirti commented

Why console.log() returns undefined?

Feb 12, 2023 · 1 min read · console.log() is a function. A function must always return some value to the caller. It's a ground rule. If a return value is not specified, then the function will return undefined*.* For example, see the below code. function addOneTo(a) { const ...