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Parsa Jiravand

Frontend developer building back-office tools with server-driven UI. Big on clean architecture, TypeScript, and writing about the craft. Currently shipping a dev post a day.

Location Istanbul - Turkey Joined Joined on  Personal website https://github.com/parsajiravand

Education

Master of IT

Pronouns

Parsa

Work

Senior frontend developer

NestJS Testing Module: Provider Overrides (with Cheat Sheet)
parsajiravand profile

NestJS Testing Module: Provider Overrides (with Cheat Sheet)

#nestjs #node #typescript #tutorial
9
Comments
11 min read

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

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

#css #webdev #frontend #a11y
8
Comments
4 min read
Stop Debouncing Resize. The Browser Already Watches It.
parsajiravand profile

Stop Debouncing Resize. The Browser Already Watches It.

#javascript #webdev #css #browser
9
Comments 1
5 min read
Your Fetch Already Streams. You're Buffering It Anyway.
parsajiravand profile

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

#javascript #webdev #api #streams
7
Comments
4 min read
Next.js Parallel & Intercepting Routes: Modals Done Right
parsajiravand profile

Next.js Parallel & Intercepting Routes: Modals Done Right

#nextjs #react #webdev #tutorial
10
Comments 1
12 min read
The Star Rating That Never Reaches Your Server
parsajiravand profile

The Star Rating That Never Reaches Your Server

#javascript #webcomponents #forms #webdev
9
Comments 1
4 min read
Vue nextTick Explained: How DOM Updates Are Batched
parsajiravand profile

Vue nextTick Explained: How DOM Updates Are Batched

#vue #javascript #tutorial #webdev
12
Comments 2
11 min read
The 'Read Aloud' Button That Only Works on the Second Click
parsajiravand profile

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

#javascript #webdev #a11y #tutorial
12
Comments 1
5 min read
useAsyncData Keys in Nuxt: Caching, Dedupe & the Sharing Bug
parsajiravand profile

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

#nuxt #ssr #javascript #tutorial
13
Comments 2
12 min read
The Search Highlight That Deletes Your Selection
parsajiravand profile

The Search Highlight That Deletes Your Selection

#css #javascript #webdev #tutorial
14
Comments 3
5 min read
addDays() Mutated a Date Three Components Away From Where I Called It
parsajiravand profile

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

#javascript #webdev #programming #typescript
12
Comments 4
5 min read
React Form Actions: useActionState & useFormStatus Guide
parsajiravand profile

React Form Actions: useActionState & useFormStatus Guide

#react #javascript #tutorial #webdev
7
Comments 2
11 min read
My .catch() Never Ran. The Bug Was Two Lines Above It
parsajiravand profile

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

#javascript #webdev #node #programming
7
Comments 2
5 min read
NestJS Module Encapsulation Explained (with Cheat Sheet)
parsajiravand profile

NestJS Module Encapsulation Explained (with Cheat Sheet)

#nestjs #node #typescript #tutorial
11
Comments 2
12 min read
I Shipped 'Passwordless Login.' It Still Asked for a Username.
parsajiravand profile

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

#webdev #security #javascript #webauthn
18
Comments 4
5 min read
Those Share Buttons Are Guessing What's On My Phone
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Those Share Buttons Are Guessing What's On My Phone

#javascript #webdev #browser #api
17
Comments 3
5 min read
Next.js Server Actions: Mutations & Security (Cheat Sheet)
parsajiravand profile

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

#nextjs #react #webdev #tutorial
17
Comments
12 min read
Your Required Field Turns Red Before You Type Anything
parsajiravand profile

Your Required Field Turns Red Before You Type Anything

#css #forms #webdev #frontend
20
Comments 2
4 min read
Web Workers in JavaScript: The Complete Guide
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Web Workers in JavaScript: The Complete Guide

#javascript #webdev #tutorial #performance
19
Comments 3
10 min read
One CSS Property Replaces Your Checkbox Hack
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One CSS Property Replaces Your Checkbox Hack

#css #webdev #frontend #a11y
23
Comments
4 min read
Your Recipe App Is Hiding a Silent Video
parsajiravand profile

Your Recipe App Is Hiding a Silent Video

#javascript #webdev #browser #api
10
Comments 2
5 min read
React Compiler 1.0: What useMemo You Can Delete
parsajiravand profile

React Compiler 1.0: What useMemo You Can Delete

#react #javascript #tutorial #webdev
17
Comments
12 min read
Your Timer Doesn't Know You Tabbed Away
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Your Timer Doesn't Know You Tabbed Away

#javascript #webdev #browser #performance
17
Comments 2
4 min read
NestJS Dependency Injection Explained (with Cheat Sheet)
parsajiravand profile

NestJS Dependency Injection Explained (with Cheat Sheet)

#nestjs #node #typescript #tutorial
10
Comments
11 min read
Stop Regex-Parsing document.cookie. Use CookieStore
parsajiravand profile

Stop Regex-Parsing document.cookie. Use CookieStore

#webdev #javascript #browser #frontend
10
Comments 1
5 min read
The await That Silently Breaks navigator.clipboard.writeText()
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The await That Silently Breaks navigator.clipboard.writeText()

#webdev #javascript #browser #frontend
12
Comments
5 min read
You're not quiet in meetings, you're editing
parsajiravand profile

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

#discuss #career #productivity #beginners
18
Comments 1
8 min read
Shadow DOM Needed JavaScript to Exist. Now It Doesn't.
parsajiravand profile

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

#webdev #javascript #html #frontend
24
Comments 5
5 min read
Next.js Cache Components Explained (with Cheat Sheet)
parsajiravand profile

Next.js Cache Components Explained (with Cheat Sheet)

#nextjs #react #webdev #tutorial
13
Comments
12 min read
Your Router Doesn't Intercept Navigation. It Reacts To It.
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Your Router Doesn't Intercept Navigation. It Reacts To It.

#javascript #webdev #browser #frontend
13
Comments
5 min read
Debounce and Throttle in JavaScript: The Complete Guide
parsajiravand profile

Debounce and Throttle in JavaScript: The Complete Guide

#javascript #webdev #tutorial #performance
18
Comments 1
11 min read
You Don't Need a WebSocket for That Live Feed
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You Don't Need a WebSocket for That Live Feed

#javascript #webdev #tutorial #api
7
Comments
6 min read
Nuxt useState vs ref(): Why Server State Leaks Across Users
parsajiravand profile

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

#nuxt #ssr #javascript #tutorial
15
Comments
12 min read
Delete Your padding-bottom Aspect-Ratio Hack
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Delete Your padding-bottom Aspect-Ratio Hack

#css #webdev #frontend #tutorial
14
Comments
5 min read
React Re-render vs Remount: What Actually Triggers Each
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React Re-render vs Remount: What Actually Triggers Each

#react #javascript #tutorial #webdev
19
Comments 1
11 min read
The outline: none Debate Has Been Over Since 2020
parsajiravand profile

The outline: none Debate Has Been Over Since 2020

#css #a11y #webdev #frontend
16
Comments
4 min read
NestJS Request Lifecycle Explained (with Cheat Sheet)
parsajiravand profile

NestJS Request Lifecycle Explained (with Cheat Sheet)

#nestjs #node #typescript #tutorial
21
Comments 5
11 min read
Your Grid Has Invisible Columns: auto-fill vs auto-fit
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Your Grid Has Invisible Columns: auto-fill vs auto-fit

#css #webdev #frontend #tutorial
14
Comments
4 min read
You're truncating bios with `.slice()`. `Intl.Segmenter` knows where the emoji actually end.
parsajiravand profile

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

#javascript #webdev #frontend #tutorial
23
Comments 2
5 min read
Delete Your Auto-Resize Textarea JS. CSS Does It Now.
parsajiravand profile

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

#css #webdev #frontend #javascript
18
Comments 1
5 min read
Nobody tells you the question window is closing

Early job ignorance costs credibility fast
parsajiravand profile

Nobody tells you the question window is closing

#discuss #career #beginners #productivity
18
Comments 4
6 min read
JavaScript Closures: The Complete Guide (with Cheat Sheet)
parsajiravand profile

JavaScript Closures: The Complete Guide (with Cheat Sheet)

#javascript #webdev #tutorial #programming
16
Comments
12 min read
CSS Animations Can't Pause. The Web Animations API Can.
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CSS Animations Can't Pause. The Web Animations API Can.

#javascript #css #webdev #frontend
12
Comments
5 min read
Vue Reactivity Explained: ref vs reactive (+ Cheat Sheet)
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Vue Reactivity Explained: ref vs reactive (+ Cheat Sheet)

#vue #javascript #tutorial #webdev
17
Comments
11 min read
JavaScript Proxy and Reflect: The Complete Guide
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JavaScript Proxy and Reflect: The Complete Guide

#javascript #webdev #tutorial #programming
16
Comments 3
13 min read
The CSS Selector Built to Lose Every Fight
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The CSS Selector Built to Lose Every Fight

#css #webdev #frontend #programming
20
Comments 1
5 min read
One version bump, 40 files to edit. Import maps fix that.
parsajiravand profile

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

#javascript #webdev #frontend #browser
16
Comments
5 min read
Your fetch in beforeunload is silently killed. navigator.sendBeacon guarantees delivery.
parsajiravand profile

Your fetch in beforeunload is silently killed. navigator.sendBeacon guarantees delivery.

#javascript #webdev #frontend #performance
19
Comments 1
4 min read
The Modal Was Open. So Was Everything Behind It.
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The Modal Was Open. So Was Everything Behind It.

#html #a11y #webdev #frontend
16
Comments
5 min read
Stop Writing Regex to Match URLs — The Browser Already Can
parsajiravand profile

Stop Writing Regex to Match URLs — The Browser Already Can

#javascript #webdev #browser #frontend
18
Comments
5 min read
Stop Writing Media Queries for Font Size
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Stop Writing Media Queries for Font Size

#css #webdev #frontend #a11y
16
Comments 1
4 min read
I Ripped Out a Carousel Library. CSS Replaced It.
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I Ripped Out a Carousel Library. CSS Replaced It.

#css #webdev #frontend #tutorial
22
Comments 1
4 min read
Stop Writing Math.cos() in a Resize Listener
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Stop Writing Math.cos() in a Resize Listener

#css #webdev #javascript #frontend
21
Comments
4 min read
I Can Finally Delete My max-height: 9999px Animation Hack
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I Can Finally Delete My max-height: 9999px Animation Hack

#css #webdev #frontend #animation
26
Comments
5 min read
Five tabs open, one refresh token — the race nobody noticed

Reveals why multi-tab apps trigger sudden logouts
parsajiravand profile

Five tabs open, one refresh token — the race nobody noticed

#javascript #webdev #frontend #async
24
Comments 5
5 min read
You copy and reverse the array to find the last match. `findLast()` searches from the end directly.
parsajiravand profile

You copy and reverse the array to find the last match. `findLast()` searches from the end directly.

#javascript #webdev #frontend #typescript
23
Comments
3 min read
Your `fetch()` in `beforeunload` is being silently dropped. Use `navigator.sendBeacon()`.
parsajiravand profile

Your `fetch()` in `beforeunload` is being silently dropped. Use `navigator.sendBeacon()`.

#javascript #webdev #frontend #performance
26
Comments 2
4 min read
You're blocking touchmove events to contain scroll. `overscroll-behavior` does it natively.
parsajiravand profile

You're blocking touchmove events to contain scroll. `overscroll-behavior` does it natively.

#css #webdev #frontend #javascript
22
Comments
4 min read
You're polling setInterval to detect DOM changes. `MutationObserver` fires when they happen.
parsajiravand profile

You're polling setInterval to detect DOM changes. `MutationObserver` fires when they happen.

#javascript #webdev #frontend #dom
22
Comments
4 min read
You're importing pako to gzip data. `CompressionStream` does it natively.
parsajiravand profile

You're importing pako to gzip data. `CompressionStream` does it natively.

#javascript #webdev #frontend #performance
28
Comments 2
4 min read
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