optional-chaining – Page 2 – CodeRavo

Checking if a Property Exists in JavaScript

In programming, it’s often necessary to check if a property or variable exists before trying to … Checking if a Property Exists in JavaScriptRead more

hasOwnProperty, in operator, isset, JavaScript, optional-chaining, Property Existence, typeof

Checking for Empty or Non-Existent Arrays in JavaScript

Checking for Empty or Non-Existent Arrays in JavaScript Arrays are fundamental data structures in JavaScript. Before … Checking for Empty or Non-Existent Arrays in JavaScriptRead more

Array, array-isarray, array-length, check-array, empty-array, falsiness, JavaScript, null, optional-chaining, truthiness, undefined

Checking for `null` and `undefined` in TypeScript: Techniques and Features

Introduction In TypeScript, a statically typed superset of JavaScript, handling null and undefined values is crucial … Checking for `null` and `undefined` in TypeScript: Techniques and FeaturesRead more

javascript-quirks, null-check, nullish-coalescing, optional-chaining, TypeScript, undefined-check

Working with Dynamic DOM Elements in Vanilla JavaScript

When working with dynamic web pages, it’s essential to understand how to interact with elements that … Working with Dynamic DOM Elements in Vanilla JavaScriptRead more

DOM, domcontentloaded, Event Listeners, optional-chaining, script-placement, Vanilla JavaScript