Parsa Jiravand

5 min read

Parsa Jiravand

Sep 26

NestJS Guards: CanActivate, ExecutionContext & Reflector

#nestjs #node #typescript #tutorial

7

12 min read

Parsa Jiravand

Sep 26

localStorage Isn't Free — It's Blocking Your Main Thread

#javascript #webdev #performance #tutorial

5 min read

Parsa Jiravand

Sep 26

JSON.stringify Is Quietly Deleting Your File Uploads

#javascript #webdev #tutorial #html

5 min read

Parsa Jiravand

Sep 26

The Background Task That Waited 40 Seconds for 'Idle'

#javascript #webdev #performance #frontend

5 min read

Parsa Jiravand

Sep 22

Vue Composables: The Shared State Trap (+ Cheat Sheet)

#vue #javascript #tutorial #webdev

11 min read

Parsa Jiravand

Sep 22

The Dropdown You've Been Faking for a Decade

#css #html #webdev #a11y

4 min read

Parsa Jiravand

Sep 22

Next.js proxy.ts Explained (with Cheat Sheet)

#nextjs #javascript #tutorial #webdev

10 min read

Parsa Jiravand

Sep 22

Stop Writing JavaScript To Fix `100vh` On Mobile

#css #webdev #frontend #tutorial

5 min read

Parsa Jiravand

Sep 20

React Derived State: Why That useState Is Probably a Bug

#react #javascript #tutorial #webdev

12 min read

Parsa Jiravand

Sep 20

Your Browser Is Rejecting Every Drop On Purpose

#javascript #webdev #html #tutorial

10

5 min read

Parsa Jiravand

Sep 20

Nuxt Hydration Mismatch: Why It Happens and How to Fix It

#nuxt #ssr #javascript #tutorial

9

12 min read

Parsa Jiravand

Sep 20

Chrome Already Has The Eyedropper You're Building

#javascript #webdev #api #tutorial

10

5 min read

Parsa Jiravand

Sep 18

NestJS Testing Module: Provider Overrides (with Cheat Sheet)

#nestjs #node #typescript #tutorial

11 min read

Parsa Jiravand

Sep 18

The CSS Property That Fixes Dark Mode's Ugly White Boxes

#css #webdev #frontend #a11y

12

4 min read

Parsa Jiravand

Sep 17

Stop Debouncing Resize. The Browser Already Watches It.

#javascript #webdev #css #browser

5 min read

Parsa Jiravand

Sep 16

Your Fetch Already Streams. You're Buffering It Anyway.

#javascript #webdev #api #streams

10

4 min read

Parsa Jiravand

Sep 15

Next.js Parallel & Intercepting Routes: Modals Done Right

#nextjs #react #webdev #tutorial

13

12 min read

Parsa Jiravand

Sep 15

The Star Rating That Never Reaches Your Server

#javascript #webcomponents #forms #webdev

4 min read

Parsa Jiravand

Sep 14

Vue nextTick Explained: How DOM Updates Are Batched

#vue #javascript #tutorial #webdev

14

11 min read

Parsa Jiravand

Sep 14

The 'Read Aloud' Button That Only Works on the Second Click

#javascript #webdev #a11y #tutorial

14

5 min read

Parsa Jiravand

Sep 13

useAsyncData Keys in Nuxt: Caching, Dedupe & the Sharing Bug

#nuxt #ssr #javascript #tutorial

12 min read

Parsa Jiravand

Sep 13

The Search Highlight That Deletes Your Selection

#css #javascript #webdev #tutorial

5 min read

Parsa Jiravand

Sep 12

addDays() Mutated a Date Three Components Away From Where I Called It

#javascript #webdev #programming #typescript

5 min read

Parsa Jiravand

Sep 12

React Form Actions: useActionState & useFormStatus Guide

#react #javascript #tutorial #webdev

9

11 min read

Parsa Jiravand

Sep 11

My .catch() Never Ran. The Bug Was Two Lines Above It

#javascript #webdev #node #programming

9

5 min read

Parsa Jiravand

Sep 11

NestJS Module Encapsulation Explained (with Cheat Sheet)

#nestjs #node #typescript #tutorial

14

12 min read

Parsa Jiravand

Sep 10

I Shipped 'Passwordless Login.' It Still Asked for a Username.

#webdev #security #javascript #webauthn

20

5 min read

Parsa Jiravand

Sep 9

Those Share Buttons Are Guessing What's On My Phone

#javascript #webdev #browser #api

5 min read

Parsa Jiravand

Sep 8

Next.js Server Actions: Mutations & Security (Cheat Sheet)

#nextjs #react #webdev #tutorial

12 min read

Parsa Jiravand

Sep 8

Your Required Field Turns Red Before You Type Anything

#css #forms #webdev #frontend

22

4 min read

Parsa Jiravand

Sep 7

Web Workers in JavaScript: The Complete Guide

#javascript #webdev #tutorial #performance

10 min read

Parsa Jiravand

Sep 7

One CSS Property Replaces Your Checkbox Hack

#css #webdev #frontend #a11y

23

4 min read

Parsa Jiravand

Sep 6

Your Recipe App Is Hiding a Silent Video

#javascript #webdev #browser #api

5 min read

Parsa Jiravand

Sep 5

React Compiler 1.0: What useMemo You Can Delete

#react #javascript #tutorial #webdev

12 min read

Parsa Jiravand

Sep 5

Your Timer Doesn't Know You Tabbed Away

#javascript #webdev #browser #performance

4 min read

Parsa Jiravand

Sep 4

NestJS Dependency Injection Explained (with Cheat Sheet)

#nestjs #node #typescript #tutorial

11 min read

Parsa Jiravand

Sep 4

Stop Regex-Parsing document.cookie. Use CookieStore

#webdev #javascript #browser #frontend

5 min read

Parsa Jiravand

Sep 3

The await That Silently Breaks navigator.clipboard.writeText()

#webdev #javascript #browser #frontend

13

5 min read

Parsa Jiravand

Sep 2

You're not quiet in meetings, you're editing

#discuss #career #productivity #beginners

8 min read

Parsa Jiravand

Sep 2

Shadow DOM Needed JavaScript to Exist. Now It Doesn't.

#webdev #javascript #html #frontend

25

5 min read

Parsa Jiravand

Sep 1

Next.js Cache Components Explained (with Cheat Sheet)

#nextjs #react #webdev #tutorial

12 min read

Parsa Jiravand

Sep 1

Your Router Doesn't Intercept Navigation. It Reacts To It.

#javascript #webdev #browser #frontend

5 min read

Parsa Jiravand

Aug 31

Debounce and Throttle in JavaScript: The Complete Guide

#javascript #webdev #tutorial #performance

11 min read

Parsa Jiravand

Aug 31

You Don't Need a WebSocket for That Live Feed

#javascript #webdev #tutorial #api

6 min read

Parsa Jiravand

Aug 30

Nuxt useState vs ref(): Why Server State Leaks Across Users

#nuxt #ssr #javascript #tutorial

12 min read

Parsa Jiravand

Aug 30

Delete Your padding-bottom Aspect-Ratio Hack

#css #webdev #frontend #tutorial

5 min read

Parsa Jiravand

Aug 29

React Re-render vs Remount: What Actually Triggers Each

#react #javascript #tutorial #webdev

20

11 min read

Parsa Jiravand

Aug 29

The outline: none Debate Has Been Over Since 2020

#css #a11y #webdev #frontend

4 min read

Parsa Jiravand

Aug 28

NestJS Request Lifecycle Explained (with Cheat Sheet)

#nestjs #node #typescript #tutorial

22

11 min read

Parsa Jiravand

Aug 28

Your Grid Has Invisible Columns: auto-fill vs auto-fit

#css #webdev #frontend #tutorial

4 min read

Parsa Jiravand

Aug 27

You're truncating bios with `.slice()`. `Intl.Segmenter` knows where the emoji actually end.

#javascript #webdev #frontend #tutorial

24

5 min read

Parsa Jiravand

Aug 26

Delete Your Auto-Resize Textarea JS. CSS Does It Now.

#css #webdev #frontend #javascript

5 min read

Early job ignorance costs credibility fast

Parsa Jiravand

Aug 25

Nobody tells you the question window is closing

#discuss #career #beginners #productivity

6 min read

Parsa Jiravand

Aug 25

JavaScript Closures: The Complete Guide (with Cheat Sheet)

#javascript #webdev #tutorial #programming

12 min read

Parsa Jiravand

Aug 25

CSS Animations Can't Pause. The Web Animations API Can.

#javascript #css #webdev #frontend

12

5 min read

Parsa Jiravand

Aug 24

Vue Reactivity Explained: ref vs reactive (+ Cheat Sheet)

#vue #javascript #tutorial #webdev

11 min read

Parsa Jiravand

Aug 24

JavaScript Proxy and Reflect: The Complete Guide

#javascript #webdev #tutorial #programming

13 min read

Parsa Jiravand

Aug 24

The CSS Selector Built to Lose Every Fight

#css #webdev #frontend #programming

20

5 min read

Parsa Jiravand

Aug 23

One version bump, 40 files to edit. Import maps fix that.

#javascript #webdev #frontend #browser