Daniel Pertu - DEV Community

Daniel Pertu

Oct 1

Our page about a competitor opens by telling you to go and fix their settings

#seo #webdev #typescript #marketing

2

7 min read

Daniel Pertu

Oct 1

A whole pub is one IP address, and our rate limiter used to take the venue offline

#webdev #nextjs #redis #architecture

2

6 min read

Daniel Pertu

Oct 1

We keep two copies of the same DOM helpers, and deduplicating them would break both

#webdev #javascript #electron #playwright

2

7 min read

Daniel Pertu

Oct 1

Our FAQPage node and our FAQ are the same array, and that is the only rule we enforce

#seo #nextjs #react #webdev

2

5 min read

Daniel Pertu

Oct 1

69 pages are one TypeScript array, and nothing else on the site is allowed to hold a list

#typescript #nextjs #seo #webdev

1

6 min read

Daniel Pertu

Oct 1

Our checkout retries once, and most of the code is about refusing to retry

#stripe #webdev #typescript #nextjs

1

7 min read

Daniel Pertu

Oct 1

Googlebot is quoted a different price than you are, and our structured data is the reason

#seo #nextjs #webdev #typescript

5 min read

Daniel Pertu

Oct 1

Our page check returns a score out of four, and the decision does not use it

#webdev #typescript #automation #javascript

6 min read

Daniel Pertu

Oct 1

Our generator ships all 109 results in the HTML, because the generator is not the page

#nextjs #seo #react #webdev

4 min read

Daniel Pertu

Oct 1

Typing the date we recorded into a date input produced the year 60901

#webdev #typescript #playwright #automation

6 min read

Daniel Pertu

Oct 1

Our IndexNow key sits in the repo on purpose, and our own auth gate was the only thing that could break it

#seo #nextjs #webdev #typescript

5 min read

Daniel Pertu

Oct 1

Six places a copy rule has to reach, and not one of them is a page

#webdev #typescript #electron #ux

1

5 min read

Daniel Pertu

Oct 1

Half our coverage tests assert that the app says nothing

#testing #typescript #architecture #webdev

5 min read

Daniel Pertu

Oct 1

expo-camera has no tap to focus, so we patched it in Kotlin, Swift and the compiled JS

#reactnative #expo #mobile #typescript

6 min read

Daniel Pertu

Oct 1

Our food log has no server, so the GDPR export has to say so in a sentence

#privacy #reactnative #architecture #typescript

6 min read

Daniel Pertu

Oct 1

Our taxonomy knew 629 E-numbers and could not tell us one was a preservative

#typescript #architecture #ux #data

5 min read

Daniel Pertu

Oct 1

We deleted 45% of our stored ingredient tags, and used our own engine as the oracle

#postgres #database #typescript #architecture

6 min read

Daniel Pertu

Oct 1

max(x) uses the index, max(x) FILTER (where ...) scans the table

#postgres #performance #database #webdev

4 min read

Daniel Pertu

Oct 1

Our app writes sentences about your numbers, so we audited every claim it makes

#javascript #webdev #testing #ux

1

5 min read

Daniel Pertu

Oct 1

Our most valuable tests do not test code, they assert that our content is true

#testing #typescript #webdev #nextjs

5 min read

Daniel Pertu

Oct 1

Our back link was a 20px tap target, and link height was the wrong number to measure

#a11y #css #webdev #frontend

4 min read

Daniel Pertu

Oct 1

We audited every new page at 320px, and the console snippet that should have run first

#css #webdev #a11y #testing

1

5 min read

Daniel Pertu

Oct 1

Our globals.css beat 514 Tailwind utilities, and CSS cascade layers were the whole story

#css #tailwindcss #webdev #frontend

5 min read

Daniel Pertu

Oct 1

Next's compiler dropped a space in 166 of our sentences, and the source was correct

#nextjs #react #webdev #typescript

4 min read

Daniel Pertu

Sep 28

A preference is not a verdict: adding a third lane without letting it argue with the rules engine

#typescript #architecture #ux #reactnative

5 min read

Daniel Pertu

Sep 28

We stopped converting our price at checkout and wrote one figure per currency instead

#stripe #typescript #webdev #payments

5 min read

Daniel Pertu

Sep 28

Our support desk is a catch-all MX record, and the plus address is the thread

#node #email #webdev #nextjs

1

5 min read

Daniel Pertu

Sep 28

Our reels compute their own verdicts, so a video cannot promise what the app would not say

#react #typescript #webdev #video

5 min read

Daniel Pertu

Sep 28

Twenty-eight research dossiers before a line of code, and the rule that every claim carries a URL

#ai #writing #seo #productivity

5 min read

Daniel Pertu

Sep 28

Next.js traces your imports, so the 102 files we read with fs were not deployed

#nextjs #webdev #serverless #node

4 min read

Daniel Pertu

Sep 28

Our preload header downloads four files the page never uses, and one query parameter is why

#webperf #nextjs #webdev #vercel

1

4 min read

Daniel Pertu

Sep 28

Nine analytics defaults we turned off, and the one that has to be decided in the browser

#webdev #analytics #webperf #nextjs

5 min read

Daniel Pertu

Sep 28

Our PWA plugin never emitted a service worker, and Turbopack is the reason

#nextjs #webdev #webperf #javascript

4 min read

Daniel Pertu

Sep 28

Our health endpoint is public, so it answers with a count instead of a name

#webdev #nextjs #security #monitoring

1

4 min read

Daniel Pertu

Sep 27

Our OG card is a Playwright screenshot, and the Chromium comes from the workspace next door

#node #playwright #nextjs #webdev

6 min read

Daniel Pertu

Sep 27

Our deploy CLI default origin is the one origin that can never work

#node #cli #seo #javascript

8 min read

Daniel Pertu

Sep 27

One backoff ladder became four, and the first retry went from ten minutes to sixty seconds

#node #typescript #architecture #webscraping

8 min read

Daniel Pertu

Sep 27

robots.txt cannot protect a URL somebody forwards, and that is the whole reason for the meta tag

#seo #nextjs #webdev #security

4 min read

Daniel Pertu

Sep 27

Our free-licence script reuses your token, because the token is not ours to regenerate

#node #postgres #devops #javascript

7 min read

Daniel Pertu

Sep 27

Three search rankers in one app, sharing one function and nothing else

#javascript #webdev #typescript #ux

5 min read

Daniel Pertu

Sep 27

Four sites, one publisher node, and an @id that deliberately is not a link

#seo #nextjs #webdev #typescript

6 min read

Daniel Pertu

Sep 27

Five things happen before our API route runs, and the order is the design

#nextjs #security #webdev #node

4 min read

Daniel Pertu

Sep 27

Four rendering modes in one Next.js app, and the root dynamic segment that answered every typo

#nextjs #seo #webdev #performance

6 min read

Daniel Pertu

Sep 27

A personalisation hint in the root layout pulled 100KB of catalogue into every page

#nextjs #react #webperf #webdev

4 min read

Daniel Pertu

Sep 27

The blanket reduced-motion rule has a hole in it, and scroll-driven CSS is what falls through

#css #a11y #webdev #performance

5 min read

Daniel Pertu

Sep 27

Our nightly deletion job failed silently on every run, and the bug was a Date object

#postgres #node #webdev #privacy

4 min read

Daniel Pertu

Sep 27

Intl says zero decimals, Stripe wants hundredths, and the shelf wants ¥2,300

#stripe #typescript #javascript #webdev

5 min read

Daniel Pertu

Sep 27

Our picker splits at nine items, and four separate rules decide when a row may move

#reactnative #ux #a11y #typescript

1

6 min read

Daniel Pertu

Sep 27

Sequential does not mean slow enough: our email loop ran at 13 sends a second

#node #webdev #serverless #postgres

5 min read

Daniel Pertu

Sep 27

The same 38 recipes are a catalogue on our website and a silent filter in our app

#typescript #architecture #seo #reactnative

6 min read

Daniel Pertu

Sep 27

373 static pages that answer by running the scanner, and the filler ingredient that answered instead

#nextjs #typescript #seo #architecture

6 min read

Daniel Pertu

Sep 27

node --test runs our TypeScript, and the price is that @/ does not exist

#node #typescript #testing #nextjs

6 min read

Daniel Pertu

Sep 27

Two quota alerts on the same 0.5 GB database, and the second one was not the table I expected

#postgres #database #devops #architecture

6 min read

Daniel Pertu

Sep 27

Three facts hide our splash screen, and the two that would have been wrong to wait for

#reactnative #expo #typescript #architecture

5 min read

Daniel Pertu

Sep 27

Six percent of the box, with an eight point floor: padding a crop the user drew with a finger

#reactnative #mobile #ux #typescript

7 min read

Daniel Pertu

Sep 27

Six files, one write pattern, and six different answers to "what if this is garbage?"

#typescript #node #electron #architecture

6 min read

Daniel Pertu

Sep 27

parseInt returned NaN, and splice(NaN, 1) deleted the first search

#typescript #node #express #webdev

6 min read

Daniel Pertu

Sep 27

Our Electron app has no test framework, and the only rule is that testable files may not import electron

#electron #typescript #testing #node

6 min read

Daniel Pertu

Sep 27

If we show the user a countdown, we have to let them skip it

#electron #typescript #react #webdev

6 min read

Daniel Pertu

Sep 27

No session, no reply: one rule enforced at the write, the run and the teardown

#typescript #node #architecture #webdev

6 min read

1 Week Community Wellness Streak

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