Can I validate an email address in JavaScript?
Email address validation can be much trickier than it sounds. Here's why and my advice on how to approach this problem.
JavaScript Articles
The JavaScript article collection contains a wide variety of ES6 helper functions. It includes helpers for dealing with primitives, arrays and objects, as well as algorithms, DOM manipulation functions and Node.js utilities.
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JavaScript · Command-line arguments in Node.js
Learn how to extract command-line arguments passed to a Node.js script.
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JavaScript · Truth check all values in a JavaScript array
Learn how to check if all values in an array are true or false.
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JavaScript · Bubble sort
Sort an array of numbers, using the bubble sort algorithm.
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JavaScript · Check if a string is a yes/no answer with JavaScript
Quickly and easily check if a string is a yes/no answer to a boolean question in your CLI programs.
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JavaScript · How can I check if a value implements a stream in Node.js?
Learn how to type check for different types of streams in Node.js.
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JavaScript · How can I truncate a string to a specified length using JavaScript?
String splitting and truncation, both simple and locale-sensitive are possible in JavaScript. Learn how in this guide.
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JavaScript · Get N elements from the start or end of a JavaScript array
Learn how to get the first or last N elements of a JavaScript array, using
Array.prototype.slice(). -
JavaScript · What is the difference between synchronous and asynchronous code in JavaScript?
Understanding the differences between synchronous and asynchronous code is a crucial piece of knowledge for every web developer.
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JavaScript · Convert a JSON object with circular references to a JavaScript string
Circular JSON objects can't be serialized using
JSON.stringify(), but you can use this trick to handle them. -
JavaScript · How can I inject CSS into a web page using JavaScript?
Injecting CSS into a page via JavaScript is pretty easy, if you know how to leverage the DOM.
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JavaScript · Immutable JavaScript objects using the Proxy object
Freezing objects is not the only way to prevent mutations. Learn how you can leverage the Proxy object to your advantage.
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JavaScript · How can I redirect the page to HTTPS in JavaScript?
Learn how to redirect the page to HTTPS if it's currently in HTTP.
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JavaScript · Call a JavaScript function once
Create a function that ensures another function is called only once.
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JavaScript · Append elements to a JavaScript array
Have you ever tried appending elements to an array in JavaScript? Here's a primer on all the available options.
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JavaScript · How can I add a key-value pair to a JavaScript object?
Adding a key-value pair to a JavaScript object is straightforward, yet there are multiple ways available to do so.
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JavaScript · Replacing JavaScript switch statement with object literals
JavaScript's
switchstatement often feels hard to remember and a little bit out of place. Maybe it's time to use object literals, instead. -
JavaScript · How can I generate all partial substrings of a string in JavaScript?
Get all the partial substrings of a string in JavaScript using generator functions.
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JavaScript · Understanding the spread and rest syntax in Javascript
JavaScript ES6 introduced us to powerful new features, such as the spread and rest syntax. Learn all you need to know in this quick guide.
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JavaScript · Introduction to Semantic Versioning (SemVer)
Learn how semantic versioning works and how to use it to correctly version your software.
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JavaScript · Run a callback on each animation frame with JavaScript
Ever wanted to run a function on each animation frame? This article shows you how to do it using
Window.requestAnimationFrame(). -
JavaScript · How can I use optional chaining and nullish coalescing in my JavaScript project?
JavaScript ES2020 introduced optional chaining and nullish coalescing. Learn everything you need to know with this quick guide.
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JavaScript · Find the minimum or maximum date using JavaScript
Quickly find the minimum or maximum date in an array of dates.
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JavaScript · Check if a JavaScript string contains only alpha or alphanumeric characters
Use a regular expression to check if a string contains only alpha or alphanumeric characters in JavaScript.