Commenting in Front‑End Languages
There are essentially two different types of commenting in development languages: single‑line, and multi‑line. Here, we discuss these, and how to use them.
Articles
JavaScript, page 9 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.
Commenting in Front‑End Languages. 
Return the Length of Arguments Passed in JavaScript. Return the Length of Arguments Passed in JavaScript
An article describing how to count function arguments in JavaScript. Use 'rest' parameters in ES6 or the 'arguments' object for older JavaScript environments.
Dynamic Array Manipulation with JavaScript's splice(). Dynamic Array Manipulation with JavaScript's
splice()Discover how to master array modifications with JavaScript's Array.prototype.splice(), your all‑in‑one method for removing, adding, and replacing elements.
LeetCode: Reversing Integers with JavaScript. LeetCode: Reversing Integers with JavaScript
Explore the 'Reverse Integer' problem, its relevance in web development, and an efficient solution using TypeScript and ES6. Dive into basic data manipulations.
Using the filter() Method in JavaScript. Using the
filter()Method in JavaScriptUse JavaScript filter() to create arrays of matching items, with callback syntax, object filtering examples, readable predicates, and practical tips.
Manipulating Strings in JavaScript with split(). Manipulating Strings in JavaScript with
split()Use JavaScript split() for string manipulation, including delimiters, limits, regular expressions, edge cases, parsing, and practical data handling.
Check If Today is Between Two Dates in JavaScript. Check If Today is Between Two Dates in JavaScript
Using JavaScript we can use the Date() function to create Date objects, and then use less/more than comparisons to work out if the date falls in between.
JavaScript String Manipulation: substring() vs. substr(). JavaScript String Manipulation:
substring()vs.substr()Delve into JavaScript's substring() and avoid confusion with substr(), mastering string slicing with clarity and precision in your coding endeavours.
Solving the LeetCode Two Sum Problem Using JavaScript. Solving the LeetCode Two Sum Problem Using JavaScript
Solve the Two Sum problem efficiently in JavaScript with Hash Map or Two Pointers. Learn how to find pairs of numbers that sum up to a given target.
Why We Use an Empty Dependency Array in React's useEffect Hook. Why We Use an Empty Dependency Array in React's
useEffectHookUnderstand the empty dependency array in React useEffect, including run‑once behaviour, cleanup, stale data risks, and how different dependencies behave.
Mastering JavaScript's slice(). Mastering JavaScript's
slice()Explore the capabilities of JavaScript's Array.prototype.slice() for creating subarrays, cloning arrays, and more, with no changes to the original.
Understanding JavaScript's sort() Method. Understanding JavaScript's
sort()MethodUnderstand JavaScript's sort() method, including in‑place mutation, string defaults, numeric comparators, object sorting, and unexpected ordering behaviour.
Responsive JavaScript and the matchMedia Method. Responsive JavaScript and the
matchMediaMethodIn the past, we used event listeners on the Window to determine the physical dimensions of a document. Using matchMedia allows us to use media query syntax.
Unravelling JavaScript: Commonly Misunderstood Methods and Features. Unravelling JavaScript: Commonly Misunderstood Methods and Features
A tour of commonly misunderstood JavaScript features, from sort(), slice(), splice(), split(), Math.random(), parseInt(), isNaN(), typeof, and more.
Using the Modulo Operator in JavaScript. Using the Modulo Operator in JavaScript
A discussion about the JavaScript modulo operator, its functionality, origins, and diverse applications in web dev, including arithmetic and complex algorithms.
Throttling Scroll Events in JavaScript. Throttling Scroll Events in JavaScript
Care needs to be taken when using the onScroll event; it can trigger frequently, leading to greater client‑side resource (CPU) usage, and a laggy interface.
How to Handle Multiple Named Exports in One JavaScript File. How to Handle Multiple Named Exports in One JavaScript File
A simple explanation about how to handle multiple named exports from a single JavaScript file; an essential piece of knowledge when developing modern websites.
How to Import All Named Exports from a JavaScript File. How to Import All Named Exports from a JavaScript File
When export and import was introduced as part of ES6, things changed for the better in JavaScript development. It still causes confusion though. Let me explain.