Understanding the Nullish Coalescing (??) Operator in JavaScript
Understand JavaScript's nullish coalescing operator, comparing ?? with ||, preserving valid falsy values, and writing clearer default‑value logic.
Articles
JavaScript, page 9 of 18
JavaScript is the working language behind most of my front‑end writing, from small browser behaviours to application state and asynchronous code. These articles favour the mechanism behind a feature over a clever trick, whether the subject is callbacks, async code, or a language edge that only becomes obvious in production.
Understanding the Nullish Coalescing (??) Operator in JavaScript. Understanding the Nullish Coalescing (
Understanding setTimeout() in JavaScript. Understanding
setTimeout()in JavaScriptAn exploration of JavaScript's `setTimeout` function. Understand its nuances in component lifecycles, and learn effective timing strategies using it.
The LeetCode Zigzag Conversion Problem in TypeScript. The LeetCode Zigzag Conversion Problem in TypeScript
An exploration of the Zigzag Conversion problem: solve using string manipulation in web development, from iterative approaches to direct mathematical solutions.
Sorting Objects in JavaScript. Sorting Objects in JavaScript
Sort arrays of objects in JavaScript with comparator functions, numeric and string properties, return values, case sensitivity, and deeper sorting notes.
Commenting in Front‑End Languages. 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.
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
Reverse integers in JavaScript with sign handling, overflow checks, TypeScript examples, and the trade‑offs between string and maths approaches.
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()A practical guide to JavaScript `substring()` and `substr()`, including indexes, lengths, swapped arguments, browser support, and which one to use.
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 React useEffect's empty dependency array, including run‑once behaviour, cleanup and how omitted or listed dependencies change when effects run.
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.