explore | Grilled Cheese

Frontend validation is NOT security.
Frontend = UX (nice feedback)
Backend = Security (real check)
Anyone can bypass your frontend in 2 seconds. Always validate again on the backend.

#webdev #javascript #buildinpublic

Faced a tangled web of obfuscated JS in an old API today. Aether mapped the logic and pinpointed the decryption routine in minutes.

Anyone else belt out some reverse engineering this week? #RE #JavaScript

TypeScript 6.0's `--checkJs` with full strict mode lets you incrementally type-check JavaScript files without rewriting everything at once, eliminating the all-or-nothing migration nightmare for mixed codebases.

#TypeScript #JavaScript #WebDev #Programming #Coding

JavaScriptのNull prototype objectとV8の最適化についての記事。
`{ __proto__: null }`や`Object.create(null)`がdictionary modeになる挙動、`Object.setProtot… "Optimizing objects with null prototypes" https://adventures.nodeland.dev/archive/optimizing-objects-with-null-prototypes/ #JavaScript #V8 #nodejs #performance #article

Preact 11.0.0リリース。
破壊的な変更として、`.mjs`のESM配布のみとなりCommonJS/UMDバンドルを削除、`render()`の第3引数を削除。
`Hydration 2.0`、`Object.is`によるHook引数の比較、`forwardRef`を不要な形変更、`createPortal`のcoreへの追加など。 "Preact 11 – Preact" https://preactjs.com/blog/preact-11/ #JavaScript #library #ReleaseNote #React

JavaScript errors can be categorized into syntax errors, runtime errors, and logical errors, and understanding the differences between them is crucial. #javascript

What I learned while building a browser-based football formation tool, from responsive player positioning to touch interactions and formation data. #javascript

Voting for the best #js13k 2026 entries ends soon! Do you have any favourites or guesses who could win?

js13kgames.com/2026/games

#gamedev #gamedevjs #gamejam #compo #competition #countdown #voting #winners #JavaScript #HTML5

Just hypnotised by this cute web crawler

#buildinpublic #webcrawling #CSS #JavaScript

I've been trying to achieve this effect without #JavaScript , but sadly it seems impossible with just #CSS :((

https://abouolia.github.io/sticky-sidebar/#scrollable-sticky-element

(it's a sticky sidebar bigger than viewport height which scrolls up/down when scrolling the page. the linked site […]

Built a user search app today 🚀

Practiced working with APIs, `fetch()`, async/await, `.find()`, DOM manipulation, input validation, and error handling.

Another JavaScript project checked off. 💪

#JavaScript #WebDev #BuildInPublic

Built a little weather lookup app today 🌦️

Got some hands-on practice with `fetch()`, async/await, APIs, geocoding, and handling cases where a city isn't found.

Slowly getting more comfortable with JavaScript. 🚀

#JavaScript #WebDev #BuildInPublic

Issue #665 of Gamedev.js Weekly newsletter about Halo in the browser, LittleJS Jam 3, and Defold 1.13.2 is out - go check it!

gamedevjsweekly.com/665

#HTML5 #JavaScript #gamedevjs #gamedev #weekly #newsletter

A developer revisits an old JavaScript accordion to understand event bubbling, event delegation, .closest(), and cleaner ways to work with the DOM. #javascript

10 Cool CodePen Demos - September 2026
alvaromontoro.com/10-cool-code...

In this edition: CSS art, groovy animations, textures and text, menus, charts and pie charts (and doughnuts), LEDs... and more!

#webdev #javascript #css #html #codepen

uncaught exception: Object { stack, message }

Thanks, that's super helpful #javascript debug console.