How to Replace All Instances of a String in JavaScript
Replacing every instance of a string in JavaScript depends on what you are matching. This guide covers replaceAll(), regexes, and older fallbacks.
Articles
JavaScript, page 12 of 17
JavaScript is probably one of the most‑used programming languages in the world, and a cornerstone of front‑end (and more general) web development. It enables the development of interactivity and features that HTML and CSS alone simply cannot, and includes more advanced concepts like closures, callbacks, and asynchronous programming.
Below you will find a subset of articles from my blog specifically about JavaScript. This is an area that I have worked with for many years, and have managed to write about quite a few times. There are three hundred collected together for you below.
How to Replace All Instances of a String in JavaScript. 
Understanding Element Dimensions in JavaScript: Width and Height. Understanding Element Dimensions in JavaScript: Width and Height
Measure element dimensions in JavaScript with clientWidth, offsetWidth, getBoundingClientRect(), innerWidth, outerWidth, and responsive layout cautions.
UseReducer in React. useReducerin React`UseReducer` in React explained clearly, including reducer functions, action objects, complex state updates, and when it is a better fit than `useState`.
Check If Three Values are Equal in JavaScript. Check If Three Values are Equal in JavaScript
A brief explanation of how to check if three variables are equal in JavaScript using the equality operators, ternary operator and Array.prototype.every method.
Toggle a Boolean in JavaScript. Toggle a Boolean in JavaScript
A brief explanation of how to toggle a variable in JavaScript by inverting its value. Learn how to switch a variable from true to false and vice versa.
Dynamic Routes in Next.js. Dynamic Routes in Next.js
Dynamic routes in Next.js explained with `[slug]` pages, route params, nested segments, and why file‑based dynamic routing simplifies content‑driven sites.
JavaScript’s Math.random(). JavaScript's
Math.random()JavaScript Math.random() explained beyond the basics, including pseudo‑random generation, browser history, ranges, array indexes, and randomness limits.
UseRef in React. useRefin ReactUse useRef in React for DOM access, focus management, mutable values, previous values, integration work, and cases where refs should not replace state.
React Hooks: Modern State Management. React Hooks: Modern State Management
React Hooks, introduced in React 16.8, bring state and lifecycle features to functional components. Here, I explore how they work and why they matter.
Class vs. Functional Components in React. Class vs. Functional Components in React
Class and functional components are key to React development. In this article I explore differences, advantages, and when to use each in modern React apps.
Advanced Techniques for Responsive Web Design. Advanced Techniques for Responsive Web Design
Discover advanced responsive web design techniques with CSS Grid, `clamp()`, container queries, and JS enhancements for performance‑optimised, adaptive sites.
Custom _app and Custom _document in Next.js. Custom
_appand Custom_documentin Next.jsCustom `_app` and `_document` in Next.js explained clearly, including shared layout, global setup, server‑rendered HTML, and what each file is actually for.
Understanding the JavaScript Event Loop. Understanding the JavaScript Event Loop
The JavaScript event loop manages asynchronous tasks in a single‑threaded environment. I explore how it works with the call stack, task queue, and microtasks.
Creating Interactive User Interfaces with HTML, CSS, and JavaScript. Creating Interactive User Interfaces with HTML, CSS, and JavaScript
Many websites feel static and unresponsive, frustrating users. This article shows how HTML, CSS, and JavaScript create dynamic, accessible interfaces.
Simplify Asynchronous JavaScript with async/await. Simplify Asynchronous JavaScript with
async/awaitUse async and await to simplify asynchronous JavaScript, with promise comparisons, error handling, readable control flow, and common pitfalls in real apps.
How to Prevent Race Conditions in JavaScript with AbortController. How to Prevent Race Conditions in JavaScript with
AbortControllerHow to prevent race conditions in JavaScript with `AbortController`, including stale search results, request cancellation, and browser support caveats.
Using next/link for Client‑Side Navigation. Using
next/linkfor Client‑Side Navigation
Event Delegation in JavaScript. Event Delegation in JavaScript
Event delegation in JavaScript manages child element events via a single parent listener. Here, I explore how it works, its benefits, and practical use cases.
