https://arling.sk/notes/ Krátke a presné odpovede na chyby, ktoré vývojári a slovenskí účtovníci stále hľadajú. Každá poznámka končí nástrojom, ktorý to skontroluje. sk Tue, 20 Oct 2026 01:07:02 GMT https://arling.sk/notes/shopify-find-products-without-description/ https://arling.sk/notes/shopify-find-products-without-description/ Tue, 20 Oct 2026 00:00:00 GMT en Merchant Center lists the flagged products, and the Shopify product export finds every product with no description. Here is how, and what Google asks for. https://arling.sk/notes/shopify-missing-field-hasmerchantreturnpolicy-shippingdetails/ https://arling.sk/notes/shopify-missing-field-hasmerchantreturnpolicy-shippingdetails/ Tue, 20 Oct 2026 00:00:00 GMT en What the Missing field warnings for returns and shipping mean in Search Console, and three ways to give Google your Shopify return and shipping terms. https://arling.sk/notes/shopify-missing-identifiers-gtin-mpn-brand/ https://arling.sk/notes/shopify-missing-identifiers-gtin-mpn-brand/ Tue, 20 Oct 2026 00:00:00 GMT en Google's missing identifiers message on Shopify: where the GTIN, MPN and brand go, and what to do for handmade, custom and vintage products. https://arling.sk/notes/kolko-stoji-webstranka-2026/ https://arling.sk/notes/kolko-stoji-webstranka-2026/ Mon, 19 Oct 2026 00:00:00 GMT sk Koľko stojí webstránka pre malú firmu v roku 2026: tvorba, doména, hosting, stavebnica, WordPress, Shoptet a správa. Ceny zo slovenských cenníkov s dátumom čítania. https://arling.sk/notes/povinne-udaje-na-webe-zivnostnik-sro/ https://arling.sk/notes/povinne-udaje-na-webe-zivnostnik-sro/ Mon, 19 Oct 2026 00:00:00 GMT sk Aké údaje musí mať web živnostníka a s. r. o. podľa Obchodného zákonníka, zákona o elektronickom obchode a zákona o ochrane spotrebiteľa: kontrolný zoznam a paragrafy. https://arling.sk/notes/rychlost-webu-na-mobile-test-zadarmo/ https://arling.sk/notes/rychlost-webu-na-mobile-test-zadarmo/ Mon, 19 Oct 2026 00:00:00 GMT sk Prečo sa web na mobile načítava pomaly a ako jeho rýchlosť zmerať zadarmo v PageSpeed Insights. Čo znamenajú LCP, INP a CLS a čo opravíte bez programátora. https://arling.sk/notes/shopify-empty-product-type-bulk-edit/ https://arling.sk/notes/shopify-empty-product-type-bulk-edit/ Mon, 19 Oct 2026 00:00:00 GMT en 49 of 113 stores that Shopify features had at least one product without a product type. Why the field matters for AI shopping and how to fill it in bulk. https://arling.sk/notes/shopify-products-not-in-chatgpt-shopify-catalog-requirements/ https://arling.sk/notes/shopify-products-not-in-chatgpt-shopify-catalog-requirements/ Mon, 19 Oct 2026 00:00:00 GMT en Why Shopify products don't appear in ChatGPT: where your admin shows Shopify Catalog status, the product requirements, and what robots.txt does not change. https://arling.sk/notes/shopify-seo-hidden-metafield-find-and-fix/ https://arling.sk/notes/shopify-seo-hidden-metafield-find-and-fix/ Mon, 19 Oct 2026 00:00:00 GMT en How the seo.hidden metafield hides a Shopify product from search engines and Shopify Catalog, how to find hidden products in bulk, and how to undo it. https://arling.sk/notes/zmerali-sme-16-webov-ubytovani-a-autoservisov/ https://arling.sk/notes/zmerali-sme-16-webov-ubytovani-a-autoservisov/ Mon, 19 Oct 2026 00:00:00 GMT sk Rýchlosť webu na mobile: 16 starších webov ubytovaní a autoservisov má v Lighthouse medián 61 zo 100, dobré skóre len tri. Metodika aj hranice vzorky. https://arling.sk/notes/advent-treasure-hunt-clues-for-kids-24-hiding-spots/ https://arling.sk/notes/advent-treasure-hunt-clues-for-kids-24-hiding-spots/ Fri, 09 Oct 2026 00:00:00 GMT en Advent treasure hunt clues for kids: a 24-day plan with hiding spots at child height, a clue for each day, rhymes and codes for older kids, and the routine. https://arling.sk/notes/christmas-murder-mystery-without-actors-or-roles/ https://arling.sk/notes/christmas-murder-mystery-without-actors-or-roles/ Fri, 09 Oct 2026 00:00:00 GMT en How to host a Christmas murder mystery for adults with no roles or scripts: a pencil and paper case for a group, a small case to try, and how to make one. https://arling.sk/notes/custom-crossword-gift-words-and-clues/ https://arling.sk/notes/custom-crossword-gift-words-and-clues/ Fri, 09 Oct 2026 00:00:00 GMT en How to make a custom crossword gift: picking 10 to 25 words, writing clues only they will get, and how long clues can be before they no longer fit the page. https://arling.sk/notes/ai-renamed-super-intelligence-what-the-order-requires/ https://arling.sk/notes/ai-renamed-super-intelligence-what-the-order-requires/ Wed, 30 Sep 2026 00:00:00 GMT en On 29 September 2026 a US executive order told federal agencies to use "Super Intelligence" and "SI" in place of "Artificial Intelligence" and "AI". What the order text requires, what it leaves alone, its one 60-day deadline, and how to change a document without rewriting law titles. https://arling.sk/notes/dobropis-oprava-zakladu-dane-obdobie-dph/ https://arling.sk/notes/dobropis-oprava-zakladu-dane-obdobie-dph/ Wed, 30 Sep 2026 00:00:00 GMT sk Kedy dobropis patrí do obdobia, keď ste ho vyhotovili, a kedy treba dodatočné priznanie za pôvodné obdobie. Zákon o DPH, príklady Finančnej správy, sadzba a náležitosti. https://arling.sk/notes/faktura-emailom-2026-suhlas-zaplatenim/ https://arling.sk/notes/faktura-emailom-2026-suhlas-zaplatenim/ Wed, 30 Sep 2026 00:00:00 GMT sk Súhlas s faktúrou e-mailom môže byť aj jej zaplatenie, píše Finančná správa. Kedy je taká faktúra vyhotovená, výnimka roku 2026 a čo sa mení od 1. 1. 2027. https://arling.sk/notes/cors-preflight-doesnt-pass-access-control-check/ https://arling.sk/notes/cors-preflight-doesnt-pass-access-control-check/ Sun, 27 Sep 2026 00:00:00 GMT en Why Chrome says the preflight does not have HTTP ok status, which server layer turns your OPTIONS request into a 401, 404, 405 or 500, and how to answer it with a 2xx. https://arling.sk/notes/cors-redirect-not-allowed-for-preflight-request/ https://arling.sk/notes/cors-redirect-not-allowed-for-preflight-request/ Sun, 27 Sep 2026 00:00:00 GMT en Why Chrome refuses a CORS preflight that gets a 3xx, how to find the redirect with one curl command, and the usual causes: a trailing slash, www, https or a login page. https://arling.sk/notes/cors-request-header-field-not-allowed/ https://arling.sk/notes/cors-request-header-field-not-allowed/ Sun, 27 Sep 2026 00:00:00 GMT en Why the CORS preflight rejects a request header such as Authorization or Content-Type, how to read the full list the browser asked for, and how to fix Access-Control-Allow-Headers. https://arling.sk/notes/cors-wildcard-origin-with-credentials/ https://arling.sk/notes/cors-wildcard-origin-with-credentials/ Sun, 27 Sep 2026 00:00:00 GMT en Why browsers reject Access-Control-Allow-Origin: * on requests with cookies, where the * comes from in Express or Laravel, and the two headers that fix it. https://arling.sk/notes/err-too-many-redirects/ https://arling.sk/notes/err-too-many-redirects/ Sun, 27 Sep 2026 00:00:00 GMT en ERR_TOO_MANY_REDIRECTS means two layers keep undoing each other's redirect. Read the loop with curl, then fix the Cloudflare, nginx, proxy or WordPress rule behind it. https://arling.sk/notes/google-given-origin-not-allowed-for-client-id/ https://arling.sk/notes/google-given-origin-not-allowed-for-client-id/ Sun, 27 Sep 2026 00:00:00 GMT en Google Identity Services logs this when the scheme, host and port of your page match no entry in Authorized JavaScript origins. The causes in order, and the fix for each. https://arling.sk/notes/jwt-invalid-signature/ https://arling.sk/notes/jwt-invalid-signature/ Sun, 27 Sep 2026 00:00:00 GMT en What JsonWebTokenError: invalid signature rules out, the four byte mismatches behind it, and how to prove which one you have before you change any code. https://arling.sk/notes/jwt-malformed/ https://arling.sk/notes/jwt-malformed/ Sun, 27 Sep 2026 00:00:00 GMT en jsonwebtoken throws jwt malformed when the value does not split into three parts at the periods. What arrived instead of a token, and the fix for each case. https://arling.sk/notes/set-cookie-blocked-samesite-lax/ https://arling.sk/notes/set-cookie-blocked-samesite-lax/ Sun, 27 Sep 2026 00:00:00 GMT en Why Chrome drops a Set-Cookie without SameSite from a cross-site API response, how to tell cross-site from cross-origin, and the two routes that fix it. https://arling.sk/notes/br-de-15-leitweg-id-pflichtfeld/ https://arling.sk/notes/br-de-15-leitweg-id-pflichtfeld/ Sat, 26 Sep 2026 00:00:00 GMT de Leitweg-ID fehlt, Fehler BR-DE-15: Die ID gehört in die Käuferreferenz BT-10 (cbc:BuyerReference). Wo sie herkommt, wie Sie die Datei korrigieren und was der KoSIT-Validator in unserem Test nicht prüfte. https://arling.sk/notes/co-sa-zmenilo-vo-faq-k-efakture-15-9-2026/ https://arling.sk/notes/co-sa-zmenilo-vo-faq-k-efakture-15-9-2026/ Sat, 26 Sep 2026 00:00:00 GMT sk FAQ Finančnej správy k eFaktúre z 15. 9. 2026 zmenilo jedinú odpoveď: správu bytov a spoločenstvo vlastníkov. Čo pribudlo 11. 9. 2026 a prehľad všetkých desiatich verzií roku 2026. https://arling.sk/notes/cors-no-access-control-allow-origin-header/ https://arling.sk/notes/cors-no-access-control-allow-origin-header/ Sat, 26 Sep 2026 00:00:00 GMT en Why the browser says No 'Access-Control-Allow-Origin' header is present, and how to find whether the preflight, a redirect or an error response lacks it. https://arling.sk/notes/efaktura-a-neplatitel-dph/ https://arling.sk/notes/efaktura-a-neplatitel-dph/ Sat, 26 Sep 2026 00:00:00 GMT sk Elektronická faktúra sa od 1. januára 2027 nevzťahuje na každého podnikateľa rovnako: povinnosť vyhotoviť ju platí len pre tuzemského platiteľa DPH pri https://arling.sk/notes/eu-sanktionsliste-und-ofac-unterschied/ https://arling.sk/notes/eu-sanktionsliste-und-ofac-unterschied/ Sat, 26 Sep 2026 00:00:00 GMT de Wer international handelt, hört neben der EU-Sanktionsliste schnell auch Begriffe wie OFAC, OFSI oder SECO, und die vier Namen stehen nicht für dasselbe.