Jotai DevTools

🚀 Features

• Debug 🐞 atom values with ease
• ⏳ Time-travel through your atoms and find bugs faster than before (recommended jotai >=2.2.0)
• Out-of-the-box 🔌 support for async/suspendible atoms
• Built-in Dark mode 🌗
• ✅ Supports custom store
• ✅ Works with provider-less mode
• ✅ Works with Next.js
• ✅ Supports custom nonce for CSP
• ✅ Hides private atoms with ability to configure (requires Jotai >=2.0.3)
• ✅ Tree-shakable and built for non-production environments
• ✅ Parses all the JavaScript values with JSON Tree view
• ✅ Diff checking with additions and deletion highlights

📺 Preview

☝️ Prerequisites

• Jotai version >=1.11.0 (highly recommended to use 2.x.x)
• React version >=17.0.0

📦 Setup

(See complete setup guide for UI-based devtools below)

# yarn
yarn add jotai-devtools

# npm
npm install jotai-devtools --save

✨ UI DevTools

Enhance your development experience with the UI based Jotai DevTool

Babel plugin setup - (Optional but highly recommended)

Use Jotai babel plugins for optimal debugging experience. Find the complete guide on jotai.org

Eg.

{
  "plugins": [
    // Enables hot reload for atoms
    "jotai/babel/plugin-react-refresh",
    // Automatically adds debug labels to the atoms
    "jotai/babel/plugin-debug-label"
  ]
}

Next JS setup

You may skip this section if you're not using Next.js.

Enable transpilePackages for the UI CSS and components to be transpiled correctly.

// next.config.ts

const nextConfig = {
  // Learn more here - https://nextjs.org/docs/advanced-features/compiler#module-transpilation
  // Required for font css to be imported correctly 👇
  transpilePackages: ['jotai-devtools'],
};

module.exports = nextConfig;

Available props

type DevToolsProps = {
  // Defaults to false
  isInitialOpen?: boolean;
  // pass a custom store
  store?: Store;
  // Defaults to light
  theme?: 'dark' | 'light';
  // Defaults to 'bottom-left'
  position?: 'top-right' | 'top-left' | 'bottom-right' | 'bottom-left';
  // Custom nonce to allowlist jotai-devtools specific inline styles via CSP
  nonce?: string;
  // We recommend keeping these options static. i.e. set it only once. Avoid connecting it to re-renderable state
  options?: {
    // Private atoms are used internally in atoms like `atomWithStorage` or `atomWithLocation`, etc. to manage state.
    // Defaults to `false`
    shouldShowPrivateAtoms?: boolean;
    // Expands the JSON tree view on initial render on Atom Viewer tab, Timeline tab, etc.
    // Defaults to `false`
    shouldExpandJsonTreeViewInitially?: boolean;
    // The interval (in milliseconds) between each step of the time travel playback.
    // Defaults to `750ms`
    timeTravelPlaybackInterval?: number;
    // The maximum number of snapshots to keep in the history.
    // The higher the number the more memory it will consume.
    // Defaults to `Infinity`. Recommended: `~30`
    snapshotHistoryLimit?: number;
  };
};

Provider-less

import { DevTools } from 'jotai-devtools';
import 'jotai-devtools/styles.css';

const App = () => {
  return (
    <>
      <DevTools />
      {/* your app */}
    </>
  );
};

With Provider

import { createStore } from 'jotai';
import { DevTools } from 'jotai-devtools';
import 'jotai-devtools/styles.css';

const customStore = createStore();

const App = () => {
  return (
    <Provider store={customStore}>
      <DevTools store={customStore} />
      {/* your app */}
    </Provider>
  );
};

Hooks

Detailed documentation is available on https://jotai.org/docs/api/devtools

import {
  useAtomsSnapshot,
  useGotoAtomsSnapshot,
  useAtomsDebugValue,
  // Redux devtool hooks
  useAtomDevtools,
  useAtomsDevtools,
} from 'jotai-devtools';

Migration guides

Migrate ƒrom @emotion/react to native CSS

With the latest release, Jotai DevTools no longer depends on @emotion/react and is replaced it with native CSS.

1. Remove @emotion/react from your dependencies

   # yarn
   yarn remove @emotion/react
   
   # npm
   npm uninstall @emotion/react

2. Replace @emotion/react with jotai-devtools/styles.css in your code

import { DevTools } from 'jotai-devtools';
+ import 'jotai-devtools/styles.css';

Migrate Jotai to V2

Find the official migration guide on jotai.org

Migrate jotai/react/devtools to jotai-devtools

1. Install this package

   # npm
   npm install jotai-devtools --save
   
   # yarn
   yarn add jotai-devtools

2. Update imports from jotai/react/devtools to jotai-devtools

   import {
    useAtomsSnapshot,
    useGotoAtomsSnapshot,
    useAtomsDebugValue,
    // Redux devtool integration hooks
    useAtomDevtools,
    useAtomsDevtools,
   - } from 'jotai/react/devtools';
   + } from 'jotai-devtools';

Inspirations

Redux DevTools React Query DevTools

Other announcements

✨ First announcement