Check If a String Contains Only Whitespace with JavaScript
Determining whether an input in your application consists of only whitespace needn't be a particularly difficult or complex task. Trim() or Regex will work!
Articles
JavaScript, page 10 of 18
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 I have worked with for many years, and it has been a regular subject in my writing. There are three hundred nineteen articles collected together for you below.
Check If a String Contains Only Whitespace with JavaScript. 
Higher‑Order Functions in JavaScript. Higher‑Order Functions in JavaScript
Higher‑order functions in JavaScript take functions as arguments or return them. Here, I explore their benefits, common use cases, and practical examples.
Spread Syntax in JavaScript (...). Spread Syntax in JavaScript (
...)In a nutshell, JavaScript spread syntax allows you to pass the elements of an iterable (for example an array), through to a function as individual elements.
The Safest Way to Test for NaN. The Safest Way to Test for
NaNNaN is an unusual concept in JavaScript, especially for developers newer to the language. As a result, testing for it can be more complex than first expected.
When to Use var or let or const. When to Use
varorletorconstCompare var, let, and const in JavaScript, including scope, hoisting, reassignment, block behaviour, ES6 defaults, and when each declaration fits.
Where to Find Jobs in Web Development. Where to Find Jobs in Web Development
Find web development jobs through job boards, aggregators, social networking, cold outreach, freelance routes, contract listings, and better search habits.
LocalStorage in JavaScript. localStoragein JavaScriptWith HTML5, new storage APIs became available that allow us to store small amounts of non‑essential data on the client‑side without needing cookies.
Optional Chaining in JavaScript (?.). Optional Chaining in JavaScript (
?.)Introduced as part of the ES2020 spec, JavaScript optional chaining takes some of the guesswork and convoluted if statement structuring out of accessing data.
Cleaning up Your JavaScript Code: The Double Bang (!!) Operator. Cleaning up Your JavaScript Code: The Double Bang (
!!) OperatorThe double bang operator turns values into explicit booleans, but it is not always the clearest option. Here's when it helps and when it does not.
React vs. Vue vs. Angular. React vs. Vue vs. Angular
Compare React, Vue, and Angular across ecosystem, learning curve, state, templates, team fit, SEO concerns, and how to choose a front‑end framework.
Static Site Generators. Static Site Generators
Static site generators trade runtime complexity for build‑time output. This article looks at the benefits, the drawbacks, and where they fit best.
All About Headless CMSes. All About Headless CMSes
Websites have not been set‑and‑forget for a long time now, and without the technical know‑how to update a static site, CMSes are a key part of web development.
What Makes a Great JavaScript Developer? What Makes a Great JavaScript Developer?
What makes a great JavaScript developer goes well beyond syntax. This article looks at judgement, fundamentals, debugging, and day‑to‑day habits.
Renaming and Destructuring Variables in ES6. Renaming and Destructuring Variables in ES6
Perhaps one of the most‑used but misunderstood features of ES6, destructuring data is easy to use and leads to cleaner, simpler code and happier developers!
How to Choose a React Developer. How to Choose a React Developer
Hiring a React developer is about more than matching keywords. This guide looks at fundamentals, judgement, and what good front‑end signals look like.
Create Arrays of Any Size with Placeholder Content in JavaScript. Create Arrays of Any Size with Placeholder Content in JavaScript
There are many different ways of creating placeholder arrays in JavaScript ‑ whether the array itself is a placeholder, or simply the content within it.
How to Hire a JavaScript Developer. How to Hire a JavaScript Developer
Hire a JavaScript developer by assessing responsibilities, core front‑end skills, framework knowledge, problem solving, collaboration, and hiring sources.
ReferenceError: Window is Not Defined in Gatsby. ReferenceError: Window is Not Defined in Gatsby
Fix window is not defined in Gatsby or Next.js by understanding SSR, guarding browser globals, lifecycle timing, dynamic imports, and third‑party modules.
