Understanding: Daniel Pertu

Daniel Pertu

Nov 3

Our site redirects /.well-known/change-password to a login form, which is worse than answering 404

#webdev #http #nextjs #webperf

5 min read

Daniel Pertu

Nov 3

Our production JavaScript ships no source maps, so I identified 1.2 MB of it by its copyright strings

#javascript #webdev #nextjs #performance

4 min read

Daniel Pertu

Nov 3

I throttled our marketing site to Fast 3G and the 400 KB of JavaScript was not the problem

#performance #webdev #nextjs #javascript

5 min read

Daniel Pertu

Nov 3

A reader who sets their browser font to Very Large gets a smaller headline on our homepage than one who sets it to Large

#css #a11y #tailwindcss #webdev

5 min read

Daniel Pertu

Nov 3

I pressed Tab 35 times on our own page, and one of the 35 focus rings does not exist

#a11y #css #webdev #frontend

5 min read

Daniel Pertu

Nov 3

Our stylesheet has no forced-colors rules, so Windows High Contrast deletes 61 gradients from our homepage

#css #a11y #webdev #frontend

5 min read

Daniel Pertu

Nov 3

Seven addresses at our own domain: one sends everything, six receive, and the one in our screenshot does neither

#webdev #email #nextjs #typescript

6 min read

Daniel Pertu

Nov 3

Our licence key is 60 bits in three groups of four, and it is unbiased only because the alphabet has 32 letters

#security #node #typescript #javascript

1

5 min read

Daniel Pertu

Nov 3

Our release doc says 600 MB. The download is 278, and the app's own index lists 355 MB that is not there.

#electron #node #javascript #devops

6 min read

Daniel Pertu

Nov 3

140 tests on our website, and every single one is about money or search engines

#testing #node #nextjs #typescript

5 min read

Daniel Pertu

Nov 3

Our five sites agree byte for byte about each other, and four of them contradict themselves

#seo #webdev #typescript #nextjs

5 min read

Daniel Pertu

Nov 3

Fifteen of our 38 pages have 37 ways in, and the newest page has one

#seo #webdev #nextjs #typescript

5 min read

Daniel Pertu

Nov 3

The one screen in our app that is forbidden from selling anything, and the sentence on it that is deliberately not a link

#reactnative #stripe #mobile #saas

5 min read

Daniel Pertu

Nov 3

Five shared packages, no build step, 1,129 tests in under four seconds, and the import extension that decides which runtime can run them

#typescript #node #monorepo #testing

5 min read

Daniel Pertu

Nov 3

Our nightly backup refuses to run for three reasons before it ever reaches pg_dump, and each refusal names the fix

#postgres #devops #database #githubactions

1

5 min read

Daniel Pertu

Nov 3

Our food log has three feelings and 140 characters, and nothing in the app is allowed to read it back to you

#privacy #reactnative #typescript #ux

5 min read

Daniel Pertu

Nov 3

A finger draws a box over a live camera preview, and 194 lines of arithmetic decide which pixels that means

#reactnative #typescript #mobile #ux

5 min read

Daniel Pertu

Nov 3

Our scanner throws away the first time it reads a barcode, and the lookup it fires anyway is what made that free

#reactnative #typescript #mobile #testing

5 min read

Daniel Pertu

Nov 2

Six predicates in this codebase are written twice, once in TypeScript and once in SQL

#sql #postgres #typescript #testing

7 min read

Daniel Pertu

Nov 2

Our admin panel can read the inbox and deliberately cannot answer it

#nextjs #architecture #webdev #typescript

5 min read

Daniel Pertu

Nov 2

Ten rules for writing a page, measured against the 76 pages: six a test holds, four only I do

#seo #testing #typescript #webdev

5 min read

Daniel Pertu

Nov 2

A plan's day is one bar, and a slider can only grow into room that is free

#react #typescript #ux #webdev

6 min read

Daniel Pertu

Nov 2

Every panel in our app is a Sheet, and the Dialog file the CLI wrote has zero importers

#react #a11y #typescript #webdev

5 min read

Daniel Pertu

Nov 2

Our campaign layout awaits one thing, the URL, and the header streams in behind it

#nextjs #react #typescript #webdev

6 min read

Daniel Pertu

Nov 2

Three number fields on our free tools, three different places they are clamped, and a comment promising sixteen cards from a sheet of four

#react #javascript #webdev #typescript

6 min read

Daniel Pertu

Nov 2

Our stylesheet contains no hex codes, our social card contains five, and our one email contains seven the stylesheet has never heard of

#css #design #a11y #webdev

1

6 min read

Daniel Pertu

Nov 2

Our site hides every scrollbar, smooth-scrolls for exactly one link, and that link does not scroll

#css #webdev #nextjs #a11y

6 min read

Daniel Pertu

Nov 2

189 exported symbols in our desktop app, 14 that nothing imports, and one of them is a feature with no button

#typescript #electron #refactoring #node

7 min read

Daniel Pertu

Nov 2

Our HTML names the same 32-character deployment id 6,052 times, and its job is to discard 456 KB of correctly cached JavaScript

#nextjs #webdev #performance #vercel

5 min read

Daniel Pertu

Nov 2

We write four version numbers to disk and read none of them, and every migration we shipped is a shape check

#electron #typescript #node #architecture

6 min read

Daniel Pertu

Nov 2

Our no-em-dash test walks five directories and passes. The repo has 454 of them, and exactly one is in a string.

#typescript #testing #webdev #writing

5 min read

Daniel Pertu

Nov 2

581 inline icons, 21 shapes between them, and 164 KB of our HTML is the attributes around the drawings

#webdev #html #a11y #performance

6 min read

Daniel Pertu

Nov 2

Our Electron UI has 37 buttons, 8 aria attributes and one Escape handler, and the modal is not a dialog

#a11y #electron #react #webdev

7 min read

Daniel Pertu

Nov 2

I fetched every URL in our sitemap. The homepage still advertises seven conditions, and the app has eight.

#seo #webdev #nextjs #testing

5 min read

Daniel Pertu

Nov 2

Two invisible characters in our Israeli price, a yen sign our font does not have, and 72 pages that all say lang=en

#webdev #nextjs #i18n #javascript

7 min read

Daniel Pertu

Nov 2

Account deletion was clearing two cache keys the app had stopped writing, and the test that caught it reads source code

#reactnative #testing #typescript #privacy

5 min read

Daniel Pertu

Nov 2

A text page on our site ships 1 MB of JavaScript, and 45 per cent of it is the error reporter

#nextjs #performance #webdev #javascript

6 min read

Daniel Pertu

Nov 2

A serving stepper that is not allowed to change the answer, and the 608 checks that say it does not

#typescript #testing #webdev #javascript

5 min read

Daniel Pertu

Nov 2

I measured the title and description of all 461 generated pages, and exactly one of them loses the brand name

#seo #nextjs #typescript #testing

5 min read

Daniel Pertu

Nov 2

We call notFound() four times and never wrote the page it lands on, and the default has zero links

#nextjs #webdev #react #ux

7 min read

Daniel Pertu

Nov 2

Our interviewer's voice is cached by a hash of the model, the voice, the instructions and the question

#ai #webdev #javascript #aws

4 min read

Daniel Pertu

Nov 2

Our privacy policy names the two fields our app sends us, and the alert request has nine

#privacy #electron #node #webdev

8 min read

Daniel Pertu

Nov 2

A whole second interview format cost us two columns, one CHECK constraint and a 312-byte migration

#postgres #database #typescript #webdev

4 min read

Daniel Pertu

Nov 2

Whisper transcribes silence as "Thanks for watching!", so we wrote a function that calls it silence

#ai #javascript #webdev #testing

4 min read

Daniel Pertu

Nov 2

Our eighth condition was 63 changed files, and the number eight is typed in none of them

#typescript #nextjs #webdev #testing

5 min read

Daniel Pertu

Nov 2

Two MediaRecorders on one stream: the audio we upload and the video that never leaves the device

#javascript #webdev #react #webapi

4 min read

Daniel Pertu

Nov 2

We deleted the part of our interview feedback that scored your face, and the privacy policy went to 1.9.0

#ai #privacy #typescript #webdev

5 min read

Daniel Pertu

Nov 2

Our interview guide cluster went from 5 pages to 14, and the new code is a three-value union

#nextjs #seo #typescript #webdev

4 min read

Daniel Pertu

Nov 1

Our 266 tests have never run anywhere but this laptop, and I found out two of them are red by running them

#testing #nextjs #devops #webdev

2

4 min read

Daniel Pertu

Nov 1

Two of our pages answer DELETE with the whole page, the other 70 answer 405, and we never wrote a line about HTTP methods

#webdev #nextjs #http #vercel

1

5 min read

Daniel Pertu

Nov 1

With JavaScript off our dark site renders white, and there is no noscript tag on any of its 72 pages

#webdev #nextjs #a11y #css

2

5 min read

Daniel Pertu

Nov 1

94 page files, zero dynamic routes, and 67 pages that write their own URL twice with nothing checking the folder

#nextjs #typescript #webdev #seo

1

4 min read

Daniel Pertu

Nov 1

635 paragraphs on our site cannot contain a link, because the page body is data and not JSX

#react #nextjs #webdev #seo

1

4 min read

Daniel Pertu

Nov 1

13.3 per cent of our HTML is class attributes, 324 distinct strings doing it, and the proof tailwind-merge works is a class that is missing

#tailwindcss #css #webdev #react

1

5 min read

Daniel Pertu

Nov 1

All 516 of our pages have exactly one h1, no skip link, and skip a heading level in exactly the same place

#a11y #webdev #html #nextjs

1

5 min read

Daniel Pertu

Nov 1

Our updater is the download page, and the one string that stops a reinstall wiping your licence is productName

#electron #javascript #node #webdev

7 min read

Daniel Pertu

Nov 1

Eight entries in one content array, 1,041 to 2,034 words each, and the optional field that has exactly one user

#typescript #webdev #seo #contentstrategy

4 min read

Daniel Pertu

Nov 1

56 pages that answer the same question, 12 to 21 percent shared text, and three of them collect every related link

#seo #webdev #typescript #architecture

1

5 min read

Daniel Pertu

Nov 1

Two of our pages are 1,065 and 1,083 words long, and the reading times under their titles say 6 minutes and 8 minutes

#webdev #seo #typescript #nextjs

1

6 min read

Daniel Pertu

Nov 1

Our only patched dependency spells its version in four places by hand, and the install checks three of them

#node #expo #devops #javascript

1

4 min read

1 Week Community Wellness Streak

Writing Debut

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