📄 tanstack/pacer/latest/docs/devtools

TanStack Pacer provides devtools for debugging and monitoring all your utilities in real-time. The devtools integrate seamlessly within the new TanStack Devtools multi-panel UI.

Note

By default, the TanStack Devtools and TanStack Pacer Devtools will only be included in development mode. This helps keep your production bundle size minimal. If you need to include devtools in production builds (e.g., for debugging production issues), you can use the alternative "production" imports.

Installation
------------

Install the devtools packages for your framework:

### React

npm install @tanstack/react-devtools @tanstack/react-pacer-devtools


npm install @tanstack/react-devtools @tanstack/react-pacer-devtools

### Solid

npm install @tanstack/solid-devtools @tanstack/solid-pacer-devtools


npm install @tanstack/solid-devtools @tanstack/solid-pacer-devtools

Basic Setup
----------- ### React Setup

tsx

import { TanStackDevtools } from '@tanstack/react-devtools'
import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools'

function App() {
  return (
    <div>
      {/* Your app content */}
      
      <TanStackDevtools
        eventBusConfig={{
          debug: false,
        }}
        plugins={[pacerDevtoolsPlugin()]}
      />
    </div>
  )
}


import { TanStackDevtools } from '@tanstack/react-devtools'
import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools'

function App() {
  return (
    <div>
      {/* Your app content */}
      
      <TanStackDevtools
        eventBusConfig={{
          debug: false,
        }}
        plugins={[pacerDevtoolsPlugin()]}
      />
    </div>
  )
}

### Solid Setup

tsx

import { TanStackDevtools } from '@tanstack/solid-devtools'
import { pacerDevtoolsPlugin } from '@tanstack/solid-pacer-devtools'

function App() {
  return (
    <div>
      {/* Your app content */}
      
      <TanStackDevtools
        eventBusConfig={{
          debug: false,
        }}
        plugins={[pacerDevtoolsPlugin()]}
      />
    </div>
  )
}


import { TanStackDevtools } from '@tanstack/solid-devtools'
import { pacerDevtoolsPlugin } from '@tanstack/solid-pacer-devtools'

function App() {
  return (
    <div>
      {/* Your app content */}
      
      <TanStackDevtools
        eventBusConfig={{
          debug: false,
        }}
        plugins={[pacerDevtoolsPlugin()]}
      />
    </div>
  )
}

Production Builds
-----------------

By default, devtools are excluded from production builds to minimize bundle size. The default imports will return no-op implementations in production:

tsx

// This will be a no-op in production builds
import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools'


// This will be a no-op in production builds
import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools'

If you need to include devtools in production builds (e.g., for debugging production issues), use the production-specific imports:

tsx

// This will include full devtools even in production builds
import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools/production'


// This will include full devtools even in production builds
import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools/production'

Registering Utilities
---------------------

Pacer utilities only register with the devtools when you pass a key. Keys are no longer generated automatically, so leave the option out if you do not want an instance to appear in the panels.

tsx

const debouncer = new Debouncer(myDebounceFn, {
  key: 'My Debouncer', // friendly name shown in the devtools
  wait: 1000,
})


const debouncer = new Debouncer(myDebounceFn, {
  key: 'My Debouncer', // friendly name shown in the devtools
  wait: 1000,
})

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