TusharShahi articles - 22 total
HTML Text Fragments 🪄
In HTML, every anchor link acts as a bookmark on the page. Besides acting as a link to another page,...
Transient Activation: Why the copy button did not work on iPhone
Introduction We recently faced a weird bug at my previous company: our app's copy button...
🧠 JS Pop Quiz: ⚡️Faster iterations
Can you make a one-liner change to the below to ~100x its performance? const ans = hugeArray ...
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Understanding CVE-2025-29927 - The Next.js Vulnerability ...
Understanding CVE-2025-29927 - The Next.js Vulnerability
I love working with Next.js and have used it in projects since version 10 came out. The release of...
The convenience of CSS's new @position-try
CSS anchor positioning came out some time ago. If you, like me, do not like writing CSS, this new API...
UI Blocking behaviour: microtasks vs macrotasks
Can you find the difference between the two code snippets below: function handleClick1() { ...
TypeScript Tip #3: Folder-wise config
The file tsconfig.json indicates that the project is using typescript. It specifies the different...
TypeScript Tip #2: valueof
While working on a TypeScript project, it is a common ask to restrict a type of variable to the value...
TypeScript Tip #1: forEach vs for loop
While working on a typescript project, it is recommended to enable noUncheckedIndexedAccess for safer...
Cost of unnecessary Optional Chaining (and Nullish coalescing operator)
If you are a developer who has worked with JavaScript in recent years, I am sure you are well aware...
Polyfill: Array.prototype.flat() without recursion
Array.prototype.flat() is a common polyfill interview question for junior JavaScript Engineers. It...
React Redux: Why your app re-renders even when it should not
Introduction React-Redux, although a little heavy, is still a wonderful library to work...
Using Suspense with React: without a 3rd party library
The basics Some time ago, React came out with Suspense and has changed the way data...
Is React un-optimized?
I recently saw a question in StackOverflow which had the below code snippet: export default...
Ternary Operator and Logical &&
Some time ago, I put a comment during a code review which led to a bug in our React Native App. I...
Custom React hook : useDebouncedEffect()
Background Recently I saw a question on Stackoverflow where the poster was looking to run...
XSS: Problem with allowing users to upload SVG
Allowing a user to upload stuff is cool. One customer-facing app I worked on, allowed users to upload...
Breaking: Fast Refresh for .env files in Next.js 12.3
Next.js 12.3 is out with a new set of improvements. A feature that will definitely save me a lot of...
Polyfill: Create your own curry()
Saw this question in an interview some time ago: Create a method curry that when passed in a...
Polyfill: Create Promise.five()
Polyfill questions are common in Javascript interviews. Some of the most common...
Implement Dark/Light mode: How to fix the flicker of incorrect theme?
Some time ago, I created my portfolio website using React + Next.js. I also added a dark mode toggle...