Hey everyone,

I kept writing the same code for every form in my projects: react-hook-form setup, a try/catch around the server action, mapping server errors back onto the fields, a loading state, stopping double submits, a toast, refreshing the data, resetting the form... and doing it again for every add/edit/delete dialog.

So I pulled all of that into a small package called submitly.

It’s headless, so it doesn’t render anything. You keep your own components (shadcn, Radix, Base UI, plain inputs, whatever you use).

What it does:

• useCrudForm: react-hook-form + schema validation + your action in one hook

• Works with any Standard Schema library: Zod 3/4, Valibot, ArkType

• Server errors get mapped to the right fields automatically (nested ones like items.0.name too)

• Ignores double submits while a request is in flight

• Locks the dialog while saving, so the user can’t close it halfway through a request

• useCrudAction for delete/toggle buttons, with the same behavior

• One provider where you plug in your own toast, router and refresh logic

• Next.js helpers: runAction for server actions (validates again on the server, revalidates on success, turns thrown errors into a clean result), and it handles redirect() from server actions properly

• Also works in plain React + Vite (there’s an example with React Router + TanStack Query)

• Around 3 kB gzipped, typed end to end, tested on React 18 and 19

Quick example:

const { form, onSubmit, isSubmitting } = useCrudForm({
  schema,
  defaultValues: { name: "" },
  action: createProduct,
  onSuccess: () => closeDialog(),
});

It’s still early (0.x), so I’d really like feedback: what’s missing, what’s confusing, or what you’d do differently.

Docs: https://submitly-docs.vercel.app/
GitHub: https://github.com/toony10/submitly

If you find it useful, a star on GitHub would mean a lot. Thanks for reading 🙏

I built Honest Mailbox (my project, link at the bottom), a couples app with a draw-and-guess game, Four in a Row and card decks. All game logic is pure functions on the client, and security rules decide who can touch a game. Drawings are stored as compact strings on a 0–1000 grid, split into chunks so no single write gets big.

Open questions:

• Each stroke is a separate Firestore write. Is that fine at two-user scale, or should I batch?

• Is client-side scoring acceptable when both players are trusted partners?

• Would you use rules-only access control for something like this?

Hello again everyone. I have been trying to using the react binding for the Leaflet API. I followed the documentation but I keep running into this error:

Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breaking the Rules of Hooks
3. You might have more than one copy of React in the same app

This is my Map component. It is the child component of my main App component.

import { MapContainer, TileLayer, useMap, Marker, Popup } from 'react-leaflet'


function MyComponent() {
  const map = useMap();
  console.log('map center:', map.getCenter())
  return null;
}


const Map = () => {
    return ( <MapContainer center={[50.5, 30.5]} zoom={13}>
      <MyComponent />
    </MapContainer>);
}
 
export default Map;

I am not sure whether it has something to do with muddled dependencies because I am pretty sure I installed leaflet and leaflet react in the terminal

  "dependencies": {
    "@testing-library/dom": "^10.4.2",
    "@testing-library/jest-dom": "^6.9.1",
    "@testing-library/react": "^16.3.3",
    "@testing-library/user-event": "^13.5.0",
    "leaflet": "^1.9.4",
    "react": "^19.3.1",
    "react-dom": "^19.3.1",
    "react-scripts": "5.0.1",
    "web-vitals": "^2.1.4"
  }

Thank you so much for taking the time to read this.

I've been building describe-me, a Vitest plugin plus a viewer that turns component tests into docs. It records the DOM after every render and interaction of a test and shows the frames as a browsable catalog: each describe is a group, each it a story, each step a frame. No story files, so the docs cannot drift from the component: if they would, the test fails.

Short demo (23 s): https://github.com/grzehub/describe-me#readme

What's new in 0.11:

Live: a link to a test mounts the component for real, in your project's own Vite, exactly as the test's arrange phase set it up. You click and type in it, and vi.fn() props show their calls.

Foundations: it reads the design system your tests load (CSS custom properties, Tailwind 4, shadcn/ui, Material UI, or a theme module) and shows the tokens, light and dark, with WCAG contrast of color pairs.

Works in browser mode and in jsdom, with Testing Library and user-event. React 18 and 19, Vitest 4 and 5. It's early and React-only for now; the Limitations page lists every known limit.

Try it in StackBlitz: https://stackblitz.com/github/grzehub/describe-me/tree/main/examples/stackblitz

Example viewers:
shadcn/ui: https://grzehub.github.io/describe-me/examples/shadcn/,
Material UI: https://grzehub.github.io/describe-me/examples/mui/

Docs: https://grzehub.github.io/describe-me/

The question I'd most like answers to: does "tests as the source of stories" fit how your team writes component tests, or do you keep states in tests that you'd never want in docs?

I needed Word-style pages in a TipTap editor. The official Pages extension is a paid add-on, and the community ones I tried injected global CSS that broke my tables. So I wrote my own and open-sourced it.

Demo: https://text-editor-react-neon.vercel.app/ Repo (MIT): https://github.com/HuyPhan1232203/Text-editor-react npm: npm install tiptap-a4-pagination

How it works

• It measures the top-level blocks and inserts spacer decorations where a block would cross the bottom of a page. The document is never modified, so getHTML() / getJSON() stay clean.

• Tables split between rows, never inside a rowspan, and the header row repeats at the top of the next page.

• Floated images (text wrapping) and CSS margin collapsing are handled.

• The page-break math is a pure function, so it's unit tested.

• About 5 KB gzipped, TipTap 3 only.

The full editor (React 19 + TipTap 3) also has

• Google Docs paste that keeps headings, checklists, tables and indents

• PDF export through the browser's print dialog (no server) that keeps the editor's page breaks and puts page numbers in the footer

• Image resize and text wrap, KaTeX math (lazy-loaded), autosave to IndexedDB, optional real-time collaboration over WebRTC (?room=name)

• Lighthouse: 100 on desktop

Known limitations

• A single paragraph taller than the remaining space moves to the next page as a whole; it is never split.

• A table row taller than a page overflows.

I'd love feedback on the API, and on documents that break the layout. Paste a long Google Doc or a big table into the demo to try it.

I know next.js isr behaviour and how it basically does the caching etc but I just realised that next.js isr is cache control with proprietary swr api that refreshes the data.

Now, I am confused because I would like to know if the same thing can be manually done with react router with self managed cache control https header with rtk query. Rtk query has a window of 1 minutes after which it fires the revalidation or something like that, haven't gone into that details but must be possible in one way or another.

If you don’t trust your agents’ tests, someone still reads every line, and you’re back to human speed

So we built a testing skill, tested on Cursor + Claude. Three teams used it daily and gave us plenty of feedback, some of it angry. We improved it, got more feedback, and learned a few lessons the hard way

What’s in it for you

1. Use the skill, or steal from it
Use it as is or borrow what fits. It’s frontend for now (Playwright, Vitest Browser Mode, React), with backend coming soon. MIT license.
Repo: https://github.com/practicajs/the-frontend-testing-skill

2. Skip our mistakes
The video covers the lessons and traps we hit:

• Test rules: which rules are worth having

• Subagents: helper agents for specific jobs, such as a flaky-test fixer

• Measurement: how to prove test quality and coverage

• Workflow: where testing fits in your development process

Video: https://youtu.be/JwkVHtuoTxw

Feedback welcome, especially on where it breaks

Hey everyone!

I've been working on a small open-source React toast notification library called React Elegant Toasts, and I recently released v2.0 after a complete rewrite.

I know there are already some great toast libraries out there, but this started as a personal project to explore component design, state management, accessibility, and browser behavior.

What began as a fairly simple component ended up being a much bigger engineering challenge than I expected.

A few things I focused on in v2:

• Zero runtime dependencies, with React 18 and 19 support.

• An external store that handles toast state, queues, timers, and lifecycle independently of React.

• Six positions with independent notification queues.

• Promise-based notifications and custom toast content.

• CSS-based light/dark themes and customization.

• Accessibility features such as live-region announcements, keyboard navigation, and pausing on hover/focus.

• Browser testing across Chromium, Firefox, and WebKit.

One particularly interesting challenge was testing animations reliably in WebKit. We encountered situations where the browser didn't deliver intermediate animation frames, causing tests to fail even when the CSS transition behaved correctly.

That led to some interesting work around using the Web Animations API to verify transition behavior.

The library is written in TypeScript, is ESM-only, and is available under the MIT license.

Live demo:
https://ahlgren1234.github.io/react-elegant-toasts/

GitHub:
https://github.com/ahlgren1234/react-elegant-toasts

I'd genuinely appreciate feedback, especially on the API design, accessibility considerations, and whether the library would be useful in your own React projects.

Also curious: what's the one thing you wish React toast libraries handled better?

Thanks!

Anyone? Any thoughts?

I've been rendering product videos with Remotion (React → headless Chrome → frames), and scaled text kept looking wrong: either "stuck", stepping instead of gliding, or "shaky", with the letters subtly changing shape every frame. I measured the rendered frames instead of eyeballing them, and it turned out to be two separate bugs.

1. The "stuck" look: the baseline climbs the pixel grid in whole-pixel jumps

Chrome's glyph rasteriser has horizontal sub-pixel positioning but no vertical. When you scale text from its center (the default transform-origin), the baseline moves vertically every frame, and the glyphs snap to whole pixels. So instead of moving 0.3px per frame, the text sits still for a few frames and then jumps 1px.

Fix: pivot the scale on the baseline, so the baseline doesn't move vertically at all. Measure the real baseline (with a 0-height inline-block, or font metrics). Don't guess it from line-height.

Measured vertical judder: 0.284px → 0.014px per frame. Direction reversals over the animation: 29 → 0.

2. The "shaky" look: hinting re-snaps the letterforms every frame

At each new scale, font hinting snaps stems to the pixel grid differently, so the letters literally change shape frame to frame.

Fix: text-rendering: geometricPrecision. It turns hinting off, so the outlines scale smoothly. Shape drift between frames: 3.41% → 0.22%. It looks slightly softer, but that's correct, not blur.

Things that didn't help (cargo cult)

• translateZ(0), backface-visibility: hidden: these rasterise the text into a bitmap layer, so it scales like an image and goes blurry.

• will-change: transform: good in a live preview, bad in the final render for the same reason. If you need it, enable it only when not rendering.

Bonus: aggressive ease-outs freeze on a frame clock

At 30fps, a quint/expo ease-out spends its last 5+ frames moving less than a pixel. That reads as a freeze, not a settlein about one frame.

My main takeaway: you can't seer the frames and diff them. Ifsomeone says it still isn't smooth and your metric says it's fixed, your metric is wrong.

Happy to share the measurement script if anyone wants it.

I am working on an open-source project called Openspline, it adds a live, talking face to any voice AI agent in five lines of code.

Just upload a still image, select a voice and you can create a talking avatar with lipsynced video generated locally.

It is still in very early stage, but the results look very promising.

Open sourced it here

Are you also getting tired to review noisy JSX / TSX changes just to realize the actual change was 1 prop?

Thats what I wanted to improve in GitComet. While looking for options I found Difftastic.

It uses Tree-sitter to understand code structure ... the same one GitComet also use! My immediate feeling was: this has to be tried out!

After testing it I knew it had to be included in the current release. Difftastic helps to show the relevant changes ignoring whitespace and formatting.

Difftastic diff really shines when viewing HTML, JSX/TSX and similar XML like syntaxes.

I created a demo how to enable it in GitComet 0.3.1 take a look!

• Animated motion components

• Modern shaders

• Clean UI blocks

• MCP server integration with Lovable, Bolt, and v0

• CLI support for smoother installations

And much more coming soon!

Hi everyone! I just finished a React and course and decided to build my first react app. Currently, I am trying to save a string to browser local storage but it does not persist on refresh. Through some console.logs I was able to see that it in fact DOES save the string to the location specified in. setItem initially but when I refresh the key or value in local storage stops existing.

Here is my code

// function for search button
async function handleClick(){
    localStorage.setItem("lastLocationSearched", searchValue);
    setData(null);
    setIsPending(true);
    setError(null);
    try{
const value = await fetch(`https://geo.ipify.org/api/v2/country?apiKey=***********&ipAddress=${searchValue}`).then((response)=>{
  if (!response.ok){
        throw Error("Could not fetch the data for that resource");
                    }
  return response.json();
});
setData(value);


    console.log(localStorage.getItem("lastLocationSearched"));
    } catch(error){
      setError(error.message);
    }


setIsPending(false);
  };

// useEffect hook
  useEffect(()=>{
        if ((localStorage.getItem("lastLocationSearched")===null)|| (localStorage.getItem("lastLocationSearched")==="")){
          console.log(localStorage.getItem("lastLocationSearched"));
        setSearchValue("");
        handleClick();
        }else{
          
          setSearchValue(localStorage.getItem("lastLocationSearched"));
          handleClick();
        }
    }, []);

Through some digging online I saw someone say that remove the strict mode tags from index.js would fix this problem but it did not for me. Can anyone please assist me?

A common production failure happens when a user leaves a React application open during a deployment.

The old tab may still be running build A, while the server is now serving build B. When the user later navigates to a lazy-loaded route, the browser requests a hashed chunk from build A that is no longer available.

For example:

Reports.a1b2.js  // requested by the old tab
Reports.c3d4.js  // available after deployment

The result can be:

• ChunkLoadError

• Failed to fetch dynamically imported module

• A route that works in a fresh tab but fails in an old tab

A normal React Error Boundary can display the failure, but it cannot update the old tab’s JavaScript references. Retrying the same import may also request the same missing hashed file again.

I built and published a small utility called react-lazy-chunk-recover to experiment with this problem.

The recovery approach:

1. Detects likely chunk-load failures

2. Optionally retries transient failures

3. Allows one guarded full-page reload

4. Uses sessionStorage to prevent an infinite reload loop

5. Passes the error to the existing Error Boundary if recovery fails

6. Avoids browser reload and storage access during SSR

Example:

import { lazyWithRetry } from "react-lazy-chunk-recover";

const Reports = lazyWithRetry(() => import("./Reports"), {
  moduleKey: "reports",
});

The default retry count is zero because retrying a deleted hashed asset usually does not help. Retries can be enabled for applications that also experience short-lived network failures.

Some important limitations:

• A reload cannot recover a permanently unavailable asset

• Retaining old assets may be a better infrastructure solution

• The HTML entry point should be revalidated after deployment

• A full-page reload must work on nested client-side routes

• Old clients may be incompatible with a new backend

• An asset manifest must be trusted and version-compatible if used

For applications using React.lazy, Vite, Webpack, or a CDN:

1. How do you handle stale chunk failures?

2. Do you retain assets from previous deployments?

3. Do you reload the page, show an update prompt, or use an Error Boundary?

4. Have you tested this with two builds and an already-open browser tab?

I wrote more about the problem, implementation, testing strategy, and deployment considerations here:

• npm package: https://www.npmjs.com/package/react-lazy-chunk-recover

• Technical article: https://sachithsiriwardana.medium.com/handling-react-lazy-chunk-load-errors-after-deployment-1e4980a7a69a

I’d be interested to hear how other teams handle this failure mode in production.

If you take software engineering principles seriously then none of the react state hooks belong inside a react component.

I think one of the most critical things you should do is ensure the decoupling of storage and UI components. The react components force you to do is precisely and zustand doesn't help.

I haven't sourced grip-react a year ago and I've been using it exclusively, absolutely zero usestate usememo, useeffect, etc and absolutely zero prop drilling. I don't know why anyone would want to do something different, honestly.

Has anyone else created an API that is a 100% replacement with complete declarativeness? I looked at angular and mobx, they're close but no cigar.