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28 items on 30 Aug 2026
JavaScript

Feature detection lies: two things I learned shipping on WebMCP

I spent eight days building a parliamentary-procedure engine on WebMCP — the emerging standard that lets a web page hand an AI agent a typed tool list through document.modelContext. The idea is one sentence: an action…

Source: DEV JavaScript feed Edy Cu
JavaScript

Browser games no download: 15 you can play right now in your browser

Browser games are back, and they’re perfect for founders who live in the browser already. When you’re shipping a SaaS or AI side project, you don’t want launchers, patches, or a 90 GB install. You want alt‑tab fun that…

Source: DEV JavaScript feed Eddie Dev
JavaScript

Keeping a 100-question quiz private in the browser

A quiz about personal experiences creates a simple product question. How much of the answer data needs to reach a server? For a single-session quiz, the useful answer can be none of it. The current version of…

Source: DEV JavaScript feed MRZHU
JavaScript

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

Two people load your Nuxt storefront within the same second. One of them refreshes their cart and sees someone else's items in it. There's no stack trace, no 500, no failed request in the network tab — just the wrong…

Source: DEV JavaScript feed Parsa Jiravand
JavaScript

การทำ Payment Gateway Integration เชื่อมต่อ TrueMoney Wallet ด้วยระบบอัตโนมัติ 100% ภายใน 3 วินาที

ในยุคที่ความเร็วคือหัวใจสำคัญของ E-Commerce และ iGaming การสร้างระบบ Automated Payment Gateway ที่สามารถตรวจจับและยืนยันยอดเงินโอนเข้าบัญชีแบบ Real-Time ภายใน 3 วินาที โดยไม่ต้องพึ่งพาพนักงาน…

Source: DEV JavaScript feed psgames
JavaScript

แกะรหัสคณิตศาสตร์เกม Lucky Neko (แมวกวัก PG Soft) — ทำไม Multiplier +2 ถึงทำให้ Variance พุ่งสูง?

ในบรรดาเกมสล็อตออนไลน์ของค่าย PG Soft ที่ได้รับความนิยมถล่มทลายทั่วโลก Lucky Neko (เนโกะนำโชค / แมวกวัก) ถือเป็นหนึ่งใน Case Study ด้าน Game Mathematics ที่น่าศึกษาที่สุด อะไรคือเหตุผลที่ทำให้ระบบตัวคูณ "Cat Multiplier…

Source: DEV JavaScript feed psgames
JavaScript

Hijri Dates in Indonesia Were a Pain to Get Right. Not Anymore.

If you've ever built a website for Indonesian users and needed to show today's Hijri date, you probably know the pain. Most Hijri calendar APIs and libraries default to Umm al-Qura (Saudi Arabia's calendar), which can…

Source: DEV JavaScript feed Pijar Sukma Adiluhung
JavaScript

Debug Browser Connection Policy Before Blaming the Proxy

Chrome 152 introduced Connection Allowlists as an origin-trial mechanism: a page can restrict the endpoints its document and workers may contact. In a proxy-backed test, that adds a failure boundary before the gateway.…

Source: DEV JavaScript feed 98IP Proxy
JavaScript

How to Convert Text to Binary (and Back) in JavaScript

You type "Hi" and the computer stores 01001000 01101001. Text is just numbers wearing a costume. Here is exactly how a string turns into binary, why UTF-8 matters, and how to do the conversion both ways in a few lines…

Source: DEV JavaScript feed Simran Kaur
JavaScript

Streaming Responses Have a Silent Gap: A Three-Myth FAQ

I was watching a chat UI print one character, stall, print two, stall again. The first guess is a dead server. The second guess is a broken proxy. Both guesses miss. The stream is alive. The tokens just arrive in the…

Source: DEV JavaScript feed Jordan Huang

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