[{"data":1,"prerenderedAt":282},["ShallowReactive",2],{"api:\u002Fapi\u002Fconfig:en":3,"api:\u002Fapi\u002Fprofile:":8,"api:\u002Fapi\u002Fcategories:en":19,"api:\u002Fapi\u002Fprojects\u002Fflashcards-sm2:en":177,"api:\u002Fapi\u002Fnotes:en":230},{"email":4,"lang":5,"name":6,"role":7},"djrciv@gmail.com","en","Ewsirdev","Web developer: websites, landing pages and Go services",{"name":6,"handle":6,"contacts":9,"note":18},{"email":10,"github":12,"telegram":15},{"url":11,"label":4},"mailto:djrciv@gmail.com",{"url":13,"label":14},"https:\u002F\u002Fgithub.com\u002Fewsir247","github.com\u002Fewsir247",{"url":16,"label":17},"https:\u002F\u002Ft.me\u002FEwsirdev","@Ewsirdev","Contacts: Telegram, GitHub, email. This file is the single source of contacts for the site, the contact block, JSON-LD sameAs, security.txt and llms.txt.",[20,49,80,108,144],{"slug":21,"title":22,"blurb":23,"variant":24,"palette":25,"layout":26,"count":27,"preview":28,"stack":44},"landings","Landing pages","One page, one job. Hand-written markup where possible, plus one WebGL experiment.","drop","ice","shots",6,[29,34,39],{"slug":30,"title":31,"shot":32,"hue":33},"landing-studio","Halftone: lighting studio","\u002Fshots\u002Flanding-studio-desktop-sm.webp",212,{"slug":35,"title":36,"shot":37,"hue":38},"landing-saas","Kill Switch: subscription tracker","\u002Fshots\u002Flanding-saas-desktop-sm.webp",182,{"slug":40,"title":41,"shot":42,"hue":43},"landing-event","Small Scale: conference","\u002Fshots\u002Flanding-event-desktop-sm.webp",124,[45,46,47,48],"CSS","HTML","GitHub Actions","JS",{"slug":50,"title":51,"blurb":52,"variant":53,"palette":54,"layout":55,"count":56,"langs":57,"preview":61,"stack":77},"sites","Multi-page sites","Sites with their own structure, routing and forms: from a client project to a set of niche pages.","merge","violet","frames",8,[58],{"lang":59,"count":60},"TypeScript",5,[62,67,72],{"slug":63,"title":64,"shot":65,"hue":66},"legal-multipage-site","Multi-page legal services website","\u002Fshots\u002Flegal-multipage-site-desktop-sm.webp",250,{"slug":68,"title":69,"shot":70,"hue":71},"niche-landings","Catalog of 10 niche demo landing pages","\u002Fshots\u002Fniche-landings-desktop-sm.webp",32,{"slug":73,"title":74,"shot":75,"hue":76},"docs-engine","Sverlo: a documentation generator in Node.js","\u002Fshots\u002Fdocs-engine-desktop-sm.webp",25,[47,59,78,79],"Cloudflare Pages","axe",{"slug":81,"title":82,"blurb":83,"variant":84,"palette":85,"layout":86,"count":27,"langs":87,"preview":90,"stack":105},"apps","Web apps","Apps you use: with a server, auth and e-mail, or offline-first PWAs where the data stays in the browser.","torus","mint","phone",[88],{"lang":59,"count":89},4,[91,96,101],{"slug":92,"title":93,"shot":94,"hue":95},"bad-club-booking-app","Bad Club: seat booking for a gaming coworking space","\u002Fshots\u002Fbad-club-booking-app-desktop-sm.webp",150,{"slug":97,"title":98,"shot":99,"hue":100},"typing-lab","typing-lab: a touch-typing trainer","\u002Fshots\u002Ftyping-lab-desktop-sm.webp",45,{"slug":102,"title":103,"shot":104,"hue":100},"budget-split","budget-split: shared expense tracker","\u002Fshots\u002Fbudget-split-desktop-sm.webp",[59,106,79,107],"Vite","vitest",{"slug":109,"title":110,"blurb":111,"variant":112,"palette":113,"layout":114,"count":115,"langs":116,"preview":125,"stack":141},"backend","Backends","Services with an API, a database and tests: in Go, Rust, Python and TypeScript. A language filter sits inside the section.","crystal","steel","list",24,[117,120,122,124],{"lang":118,"count":119},"Go",12,{"lang":121,"count":89},"Python",{"lang":123,"count":89},"Rust",{"lang":59,"count":89},[126,131,136],{"slug":127,"title":128,"shot":129,"hue":130},"kanban-tasks","Amber: kanban board","\u002Fshots\u002Fkanban-tasks-desktop-sm.webp",344,{"slug":132,"title":133,"shot":134,"hue":135},"link-shortener","Short: link shortener","\u002Fshots\u002Flink-shortener-desktop-sm.webp",111,{"slug":137,"title":138,"shot":139,"hue":140},"booking-slots","Appointment booking","\u002Fshots\u002Fbooking-slots-desktop-sm.webp",65,[142,47,143,118],"Docker","SQLite",{"slug":145,"title":146,"blurb":147,"variant":148,"palette":149,"layout":150,"count":27,"langs":151,"preview":158,"stack":174},"cli","CLI tools","Terminal programs: one binary, clear flags, an exit code you can check in a script.","swarm","champagne","terminal",[152,154,156,157],{"lang":118,"count":153},3,{"lang":121,"count":155},1,{"lang":123,"count":155},{"lang":59,"count":155},[159,164,169],{"slug":160,"title":161,"shot":162,"hue":163},"gitpulse","GitPulse: git repository analytics","\u002Fshots\u002Fgitpulse-desktop-sm.webp",7,{"slug":165,"title":166,"shot":167,"hue":168},"logslice","logslice: log analysis with no dependencies","\u002Fshots\u002Flogslice-desktop-sm.webp",160,{"slug":170,"title":171,"shot":172,"hue":173},"envguard","envguard: a linter and a safe for .env files","\u002Fshots\u002Fenvguard-desktop-sm.webp",35,[47,175,142,176],"CLI","stdlib only",{"slug":178,"title":179,"type":180,"category":81,"lang":59,"live_url":181,"stack":182,"description":188,"highlights":189,"run":194,"hue":195,"og":196,"shots":197,"case":205,"case_lang":5,"prev":224,"next":227},"flashcards-sm2","flashcards-sm2: \"Cards\", a flashcard box with SM-2 spaced repetition","app","https:\u002F\u002Fewsirdev-cards.pages.dev",[183,59,106,184,185,186,187,107,79,78,47],"Vue 3","IndexedDB","PWA","SM-2","fast-check","A concept app on Vue 3: decks of cards and review by the SM-2 algorithm, offline and with no backend, data in IndexedDB. CSV\u002FTSV import detects the delimiter and encoding itself (UTF-8, UTF-16 by BOM, Windows-1251), export is protected from CSV injection, and there is a full JSON backup with strict validation. SVG statistics: a 30-day forecast, card maturity, retention.",[190,191,192,193],"SM-2 as in the SuperMemo-2 description: EF from 1.3, intervals 1, 6, then round(prev·EF); differences from the original are documented","The schedule is stored as dates, not timestamps: time zones and daylight saving shift nothing; the day boundary can be moved","CSV import with encoding and delimiter autodetection, limits of 1 MB and 5,000 rows","30 vitest tests + fast-check; a card flip in pure CSS, keyboard (space, 1 to 4), axe 0","cd flashcards-sm2 && npm ci && npm run dev",300,"\u002Fog\u002Fen\u002Fflashcards-sm2.jpg",{"desktop":198,"desktop_sm":199,"mobile":200,"dw":201,"dh":202,"mw":203,"mh":204},"\u002Fshots\u002Fflashcards-sm2-desktop.webp","\u002Fshots\u002Fflashcards-sm2-desktop-sm.webp","\u002Fshots\u002Fflashcards-sm2-mobile.webp",1280,800,390,844,{"about":206,"features":209,"run":215,"notes":220},[207,208],"The task: an offline flashcard box whose review schedule does not break when the time zone or daylight saving changes, and whose import of foreign CSVs does not require guessing the encoding.","The solution: Vue 3 + TypeScript, the SM-2 algorithm as pure logic with no DOM, data in IndexedDB. \"Today\" is the device calendar date, the schedule is stored as dates, not timestamps.",[210,211,212,213,193,214],"SM-2 as in the SuperMemo-2 description: EF from 1.3, start 2.5, intervals of 1 and 6 days, then max(prev+1, round(prev·EF)), a cap of 3650 days; differences from the original are in the README","CSV\u002FTSV import: quotes and line breaks in cells, delimiter and encoding (UTF-8, UTF-16 by BOM, Windows-1251) detected automatically; limits 1 MB, 5,000 rows","CSV export protected from CSV injection and a full JSON backup with strict validation on load","SVG statistics: a 30-day review forecast, card maturity, retention, a 26-week heatmap","Deployed on Cloudflare Pages, the PWA works offline",[216,217,218,219],"git clone \u003Crepository on request> flashcards-sm2","cd flashcards-sm2","npm ci","npm run dev",[221,222,223],"A concept: no sync between devices, no images or audio.","Reverse cards are not created automatically.","Data is tied to the browser and profile: clearing site data deletes it, hence the JSON backup.",{"slug":225,"title":226},"habit-tracker","habit-tracker: \"Habit\", an offline habit tracker (demo)",{"slug":228,"title":229},"scratch-notes","scratch-notes: \"Draft\", an offline Markdown note editor",[231,238,243,248,252,257,262,267,272,277],{"slug":232,"lang":5,"title":233,"date":234,"summary":235,"project":236,"minutes":237},"csp-no-inline-nuxt","CSP without inline scripts: what had to be switched off in Nuxt","2026-10-30","Why a strict script-src self policy breaks static Nuxt, which three steps made the site compatible, and the build check that keeps it so.","landscape-bureau-nuxt",2,{"slug":239,"lang":5,"title":240,"date":234,"summary":241,"project":242,"minutes":237},"hash-chain-tail-truncation","A hash-chained journal: what it catches and what it does not","How ledger-core builds a SHA-256 chain and checks it through \u002Fv1\u002Fverify, why tampering in the middle shows but tail truncation does not.","ledger-core",{"slug":244,"lang":5,"title":245,"date":234,"summary":246,"project":247,"minutes":237},"qr-from-scratch","A QR code from scratch: Reed-Solomon, masks and proving it right","How a zero-dependency QR encoder in TypeScript is built, and four independent ways to check that the matrix is correct.","qr-svg",{"slug":249,"lang":5,"title":250,"date":234,"summary":251,"project":178,"minutes":237},"sm2-day-boundaries","SM-2 and day boundaries: why the schedule is stored as dates","How flashcards-sm2 and habit-tracker avoid shifts from time zones and daylight saving: dates instead of timestamps and a movable day boundary.",{"slug":253,"lang":5,"title":254,"date":234,"summary":255,"project":256,"minutes":237},"ssrf-after-dns","SSRF in webhooks: checking the address after DNS","Why a webhook delivery service checks the addresses after DNS resolution, not the URL string, and how hook-relay connects to the very address it checked.","hook-relay",{"slug":258,"lang":5,"title":259,"date":234,"summary":260,"project":261,"minutes":237},"token-bucket-integers","A token bucket on integers: what property tests check","How rate-gate computes a token bucket without floats, why milli-tokens, and which three properties the proptest property tests prove.","rate-gate",{"slug":263,"lang":5,"title":264,"date":265,"summary":266,"project":137,"minutes":155},"double-booking","Double booking: a transaction plus a partial UNIQUE index","2026-10-20","How booking-slots protects against two clients booking the same time at once, and how that protection is tested.",{"slug":268,"lang":5,"title":269,"date":265,"summary":270,"project":271,"minutes":237},"lease-and-fencing","Lease and fencing: how a queue neither loses a job nor lets a zombie finish it twice","A worker can crash, stall, or wake up after its job was taken by someone else. How the lease and the lease token in job-queue deal with that on SQLite.","job-queue",{"slug":273,"lang":5,"title":274,"date":265,"summary":275,"project":276,"minutes":237},"p95-nearest-rank","p95 in an uptime monitor: the nearest-rank method and what it does not hide","How uptime-monitor computes p50\u002Fp95 latency and uptime, why the nearest-rank method was chosen, and where those numbers can mislead.","uptime-monitor",{"slug":278,"lang":5,"title":279,"date":265,"summary":280,"project":281,"minutes":237},"websocket-from-scratch","WebSocket on the standard library: what really happens under new WebSocket()","Why realtime-rooms has its own RFC 6455 layer, which protocol violations it checks, and why a library is still the better choice for production.","realtime-rooms",1793371810542]