📄 tanstack/pacer/latest/docs/framework/react/examples/useRateLimiterWithPersister
File: useRateLimiterWithPersister.md | Updated: 11/15/2025
Source: https://tanstack.com/pacer/latest/docs/framework/react/examples/useRateLimiterWithPersister
Search...
+ K
Auto
Docs Examples GitHub Contributors
Docs Examples GitHub Contributors
Docs Examples GitHub Contributors
Docs Examples Github Contributors
Docs Examples Github Contributors
Docs Examples Github Contributors
Docs Examples Github Contributors
Docs Examples Github Contributors
Maintainers Partners Support Learn StatsBETA Discord Merch Blog GitHub Ethos Brand Guide
Documentation
Framework
React
Version
Latest
Search...
+ K
Menu
Getting Started
Guides
API Reference
Debouncer API Reference
Throttler API Reference
Rate Limiter API Reference
Queue API Reference
Batcher API Reference
Debouncer Examples
Throttler Examples
Rate Limiter Examples
Queue Examples
Batcher Examples
TanStack Query Examples
Framework
React
Version
Latest
Menu
Getting Started
Guides
API Reference
Debouncer API Reference
Throttler API Reference
Rate Limiter API Reference
Queue API Reference
Batcher API Reference
Debouncer Examples
Throttler Examples
Rate Limiter Examples
Queue Examples
Batcher Examples
TanStack Query Examples
React Example: UseRateLimiterWithPersister
=====================================================================================================================================================================================================================================================================================================================================================================================================================================================================================
Code ExplorerCode
Interactive SandboxSandbox
-
public
-
src
index.tsx
-
README.md
-
index.html
-
package.json
-
tsconfig.json
tsx
import { useEffect, useState } from 'react'
import ReactDOM from 'react-dom/client'
import { useRateLimiter } from '@tanstack/react-pacer/rate-limiter'
import { useStoragePersister } from '@tanstack/react-persister/storage-persister'
import type { RateLimiterState } from '@tanstack/react-pacer/rate-limiter'
function App1() {
const [windowType, setWindowType] = useState<'fixed' | 'sliding'>('fixed')
// Use your state management library of choice
const [instantCount, setInstantCount] = useState(0) // not rate-limited
const [limitedCount, setLimitedCount] = useState(0) // rate-limited
const rateLimiterPersister = useStoragePersister<RateLimiterState>({
key: 'my-rate-limiter',
storage: localStorage,
maxAge: 1000 * 60, // 1 minute
buster: 'v1',
})
// Using useRateLimiter with a rate limit of 5 executions per 5 seconds
const rateLimiter = useRateLimiter(
setLimitedCount,
{
// enabled: () => instantCount > 2,
limit: 5,
window: 5000,
windowType: windowType,
onReject: (rateLimiter) =>
console.log(
'Rejected by rate limiter',
rateLimiter.getMsUntilNextWindow(),
),
// optional local storage persister to retain state on page refresh
initialState: rateLimiterPersister.loadState(),
},
// Optional Selector function to pick the state you want to track and use
(state) => state, // entire state subscription for persister - don't do this unless you need to
)
useEffect(() => {
rateLimiterPersister.saveState(rateLimiter.state)
}, [rateLimiter.state])
function increment() {
// this pattern helps avoid common bugs with stale closures and state
setInstantCount((c) => {
const newCount = c + 1 // common new value for both
rateLimiter.maybeExecute(newCount) // rate-limited state update
return newCount // instant state update
})
}
return (
<div>
<h1>TanStack Pacer useRateLimiter Example 1 (with persister)</h1>
<div style={{ display: 'grid', gap: '0.5rem', marginBottom: '1rem' }}>
<label>
<input
type="radio"
name="windowType"
value="fixed"
checked={windowType === 'fixed'}
onChange={() => setWindowType('fixed')}
/>
Fixed Window
</label>
<label>
<input
type="radio"
name="windowType"
value="sliding"
checked={windowType === 'sliding'}
onChange={() => setWindowType('sliding')}
/>
Sliding Window
</label>
</div>
<table>
<tbody>
<tr>
<td>Execution Count:</td>
<td>{rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>Rejection Count:</td>
<td>{rateLimiter.state.rejectionCount}</td>
</tr>
<tr>
<td>Remaining in Window:</td>
<td>{rateLimiter.getRemainingInWindow()}</td>
</tr>
<tr>
<td>Ms Until Next Window:</td>
<td>{rateLimiter.getMsUntilNextWindow()}</td>
</tr>
<tr>
<td colSpan={2}>
<hr />
</td>
</tr>
<tr>
<td>Instant Count:</td>
<td>{instantCount}</td>
</tr>
<tr>
<td>Rate Limited Count:</td>
<td>{limitedCount}</td>
</tr>
</tbody>
</table>
<div>
<button onClick={increment}>Increment</button>
<button onClick={() => rateLimiter.reset()}>Reset</button>
</div>
<pre style={{ marginTop: '20px' }}>
{JSON.stringify(rateLimiter.store.state, null, 2)}
</pre>
</div>
)
}
function App2() {
const [instantSearch, setInstantSearch] = useState('')
const [limitedSearch, setLimitedSearch] = useState('')
// Using useRateLimiter with a rate limit of 5 executions per 5 seconds
const rateLimiter = useRateLimiter(
setLimitedSearch,
{
enabled: instantSearch.length > 2, // optional, defaults to true
limit: 5,
window: 5000,
// windowType: 'sliding', // default is 'fixed'
onReject: (rateLimiter) =>
console.log(
'Rejected by rate limiter',
rateLimiter.getMsUntilNextWindow(),
),
},
// Optional Selector function to pick the state you want to track and use
(state) => ({
executionCount: state.executionCount,
rejectionCount: state.rejectionCount,
}),
)
function handleSearchChange(e: React.ChangeEvent<HTMLInputElement>) {
const newValue = e.target.value
setInstantSearch(newValue)
rateLimiter.maybeExecute(newValue)
}
return (
<div>
<h1>TanStack Pacer useRateLimiter Example 2</h1>
<div>
<input
autoFocus
type="search"
value={instantSearch}
onChange={handleSearchChange}
placeholder="Type to search..."
style={{ width: '100%' }}
/>
</div>
<table>
<tbody>
<tr>
<td>Execution Count:</td>
<td>{rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>Rejection Count:</td>
<td>{rateLimiter.state.rejectionCount}</td>
</tr>
<tr>
<td>Remaining in Window:</td>
<td>{rateLimiter.getRemainingInWindow()}</td>
</tr>
<tr>
<td>Ms Until Next Window:</td>
<td>{rateLimiter.getMsUntilNextWindow()}</td>
</tr>
<tr>
<td colSpan={2}>
<hr />
</td>
</tr>
<tr>
<td>Instant Search:</td>
</tr>
<tr>
<td>Rate Limited Search:</td>
<td>{limitedSearch}</td>
</tr>
</tbody>
</table>
<div>
<button onClick={() => rateLimiter.reset()}>Reset</button>
</div>
<pre style={{ marginTop: '20px' }}>
{JSON.stringify(rateLimiter.store.state, null, 2)}
</pre>
</div>
)
}
function App3() {
const [currentValue, setCurrentValue] = useState(50)
const [limitedValue, setLimitedValue] = useState(50)
const [instantExecutionCount, setInstantExecutionCount] = useState(0)
// Using useRateLimiter with a rate limit of 5 executions per 5 seconds
const rateLimiter = useRateLimiter(
setLimitedValue,
{
limit: 20,
window: 2000,
onReject: (rateLimiter) =>
console.log(
'Rejected by rate limiter',
rateLimiter.getMsUntilNextWindow(),
),
},
// Optional Selector function to pick the state you want to track and use
(state) => ({
executionCount: state.executionCount,
rejectionCount: state.rejectionCount,
}),
)
function handleRangeChange(e: React.ChangeEvent<HTMLInputElement>) {
const newValue = parseInt(e.target.value, 10)
setCurrentValue(newValue)
setInstantExecutionCount((c) => c + 1)
rateLimiter.maybeExecute(newValue)
}
return (
<div>
<h1>TanStack Pacer useRateLimiter Example 3</h1>
<div style={{ marginBottom: '20px' }}>
<label>
Current Range:
<input
type="range"
min="0"
max="100"
value={currentValue}
onChange={handleRangeChange}
style={{ width: '100%' }}
/>
<span>{currentValue}</span>
</label>
</div>
<div style={{ marginBottom: '20px' }}>
<label>
Rate Limited Range (Readonly):
<input
type="range"
min="0"
max="100"
value={limitedValue}
readOnly
style={{ width: '100%' }}
/>
<span>{limitedValue}</span>
</label>
</div>
<table>
<tbody>
<tr>
<td>Execution Count:</td>
<td>{rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>Rejection Count:</td>
<td>{rateLimiter.state.rejectionCount}</td>
</tr>
<tr>
<td>Remaining in Window:</td>
<td>{rateLimiter.getRemainingInWindow()}</td>
</tr>
<tr>
<td>Ms Until Next Window:</td>
<td>{rateLimiter.getMsUntilNextWindow()}</td>
</tr>
<tr>
<td>Instant Executions:</td>
<td>{instantExecutionCount}</td>
</tr>
<tr>
<td>Saved Executions:</td>
<td>{instantExecutionCount - rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>% Reduction:</td>
<td>
{instantExecutionCount === 0
? '0'
: Math.round(
((instantExecutionCount -
rateLimiter.state.executionCount) /
instantExecutionCount) *
100,
)}
%
</td>
</tr>
</tbody>
</table>
<div style={{ color: '#666', fontSize: '0.9em' }}>
<p>Rate limited to 20 updates per 2 seconds</p>
</div>
<pre style={{ marginTop: '20px' }}>
{JSON.stringify(rateLimiter.store.state, null, 2)}
</pre>
</div>
)
}
const root = ReactDOM.createRoot(document.getElementById('root')!)
root.render(
<div>
<App1 />
<hr />
<App2 />
<hr />
<App3 />
</div>,
)
import { useEffect, useState } from 'react'
import ReactDOM from 'react-dom/client'
import { useRateLimiter } from '@tanstack/react-pacer/rate-limiter'
import { useStoragePersister } from '@tanstack/react-persister/storage-persister'
import type { RateLimiterState } from '@tanstack/react-pacer/rate-limiter'
function App1() {
const [windowType, setWindowType] = useState<'fixed' | 'sliding'>('fixed')
// Use your state management library of choice
const [instantCount, setInstantCount] = useState(0) // not rate-limited
const [limitedCount, setLimitedCount] = useState(0) // rate-limited
const rateLimiterPersister = useStoragePersister<RateLimiterState>({
key: 'my-rate-limiter',
storage: localStorage,
maxAge: 1000 * 60, // 1 minute
buster: 'v1',
})
// Using useRateLimiter with a rate limit of 5 executions per 5 seconds
const rateLimiter = useRateLimiter(
setLimitedCount,
{
// enabled: () => instantCount > 2,
limit: 5,
window: 5000,
windowType: windowType,
onReject: (rateLimiter) =>
console.log(
'Rejected by rate limiter',
rateLimiter.getMsUntilNextWindow(),
),
// optional local storage persister to retain state on page refresh
initialState: rateLimiterPersister.loadState(),
},
// Optional Selector function to pick the state you want to track and use
(state) => state, // entire state subscription for persister - don't do this unless you need to
)
useEffect(() => {
rateLimiterPersister.saveState(rateLimiter.state)
}, [rateLimiter.state])
function increment() {
// this pattern helps avoid common bugs with stale closures and state
setInstantCount((c) => {
const newCount = c + 1 // common new value for both
rateLimiter.maybeExecute(newCount) // rate-limited state update
return newCount // instant state update
})
}
return (
<div>
<h1>TanStack Pacer useRateLimiter Example 1 (with persister)</h1>
<div style={{ display: 'grid', gap: '0.5rem', marginBottom: '1rem' }}>
<label>
<input
type="radio"
name="windowType"
value="fixed"
checked={windowType === 'fixed'}
onChange={() => setWindowType('fixed')}
/>
Fixed Window
</label>
<label>
<input
type="radio"
name="windowType"
value="sliding"
checked={windowType === 'sliding'}
onChange={() => setWindowType('sliding')}
/>
Sliding Window
</label>
</div>
<table>
<tbody>
<tr>
<td>Execution Count:</td>
<td>{rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>Rejection Count:</td>
<td>{rateLimiter.state.rejectionCount}</td>
</tr>
<tr>
<td>Remaining in Window:</td>
<td>{rateLimiter.getRemainingInWindow()}</td>
</tr>
<tr>
<td>Ms Until Next Window:</td>
<td>{rateLimiter.getMsUntilNextWindow()}</td>
</tr>
<tr>
<td colSpan={2}>
<hr />
</td>
</tr>
<tr>
<td>Instant Count:</td>
<td>{instantCount}</td>
</tr>
<tr>
<td>Rate Limited Count:</td>
<td>{limitedCount}</td>
</tr>
</tbody>
</table>
<div>
<button onClick={increment}>Increment</button>
<button onClick={() => rateLimiter.reset()}>Reset</button>
</div>
<pre style={{ marginTop: '20px' }}>
{JSON.stringify(rateLimiter.store.state, null, 2)}
</pre>
</div>
)
}
function App2() {
const [instantSearch, setInstantSearch] = useState('')
const [limitedSearch, setLimitedSearch] = useState('')
// Using useRateLimiter with a rate limit of 5 executions per 5 seconds
const rateLimiter = useRateLimiter(
setLimitedSearch,
{
enabled: instantSearch.length > 2, // optional, defaults to true
limit: 5,
window: 5000,
// windowType: 'sliding', // default is 'fixed'
onReject: (rateLimiter) =>
console.log(
'Rejected by rate limiter',
rateLimiter.getMsUntilNextWindow(),
),
},
// Optional Selector function to pick the state you want to track and use
(state) => ({
executionCount: state.executionCount,
rejectionCount: state.rejectionCount,
}),
)
function handleSearchChange(e: React.ChangeEvent<HTMLInputElement>) {
const newValue = e.target.value
setInstantSearch(newValue)
rateLimiter.maybeExecute(newValue)
}
return (
<div>
<h1>TanStack Pacer useRateLimiter Example 2</h1>
<div>
<input
autoFocus
type="search"
value={instantSearch}
onChange={handleSearchChange}
placeholder="Type to search..."
style={{ width: '100%' }}
/>
</div>
<table>
<tbody>
<tr>
<td>Execution Count:</td>
<td>{rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>Rejection Count:</td>
<td>{rateLimiter.state.rejectionCount}</td>
</tr>
<tr>
<td>Remaining in Window:</td>
<td>{rateLimiter.getRemainingInWindow()}</td>
</tr>
<tr>
<td>Ms Until Next Window:</td>
<td>{rateLimiter.getMsUntilNextWindow()}</td>
</tr>
<tr>
<td colSpan={2}>
<hr />
</td>
</tr>
<tr>
<td>Instant Search:</td>
</tr>
<tr>
<td>Rate Limited Search:</td>
<td>{limitedSearch}</td>
</tr>
</tbody>
</table>
<div>
<button onClick={() => rateLimiter.reset()}>Reset</button>
</div>
<pre style={{ marginTop: '20px' }}>
{JSON.stringify(rateLimiter.store.state, null, 2)}
</pre>
</div>
)
}
function App3() {
const [currentValue, setCurrentValue] = useState(50)
const [limitedValue, setLimitedValue] = useState(50)
const [instantExecutionCount, setInstantExecutionCount] = useState(0)
// Using useRateLimiter with a rate limit of 5 executions per 5 seconds
const rateLimiter = useRateLimiter(
setLimitedValue,
{
limit: 20,
window: 2000,
onReject: (rateLimiter) =>
console.log(
'Rejected by rate limiter',
rateLimiter.getMsUntilNextWindow(),
),
},
// Optional Selector function to pick the state you want to track and use
(state) => ({
executionCount: state.executionCount,
rejectionCount: state.rejectionCount,
}),
)
function handleRangeChange(e: React.ChangeEvent<HTMLInputElement>) {
const newValue = parseInt(e.target.value, 10)
setCurrentValue(newValue)
setInstantExecutionCount((c) => c + 1)
rateLimiter.maybeExecute(newValue)
}
return (
<div>
<h1>TanStack Pacer useRateLimiter Example 3</h1>
<div style={{ marginBottom: '20px' }}>
<label>
Current Range:
<input
type="range"
min="0"
max="100"
value={currentValue}
onChange={handleRangeChange}
style={{ width: '100%' }}
/>
<span>{currentValue}</span>
</label>
</div>
<div style={{ marginBottom: '20px' }}>
<label>
Rate Limited Range (Readonly):
<input
type="range"
min="0"
max="100"
value={limitedValue}
readOnly
style={{ width: '100%' }}
/>
<span>{limitedValue}</span>
</label>
</div>
<table>
<tbody>
<tr>
<td>Execution Count:</td>
<td>{rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>Rejection Count:</td>
<td>{rateLimiter.state.rejectionCount}</td>
</tr>
<tr>
<td>Remaining in Window:</td>
<td>{rateLimiter.getRemainingInWindow()}</td>
</tr>
<tr>
<td>Ms Until Next Window:</td>
<td>{rateLimiter.getMsUntilNextWindow()}</td>
</tr>
<tr>
<td>Instant Executions:</td>
<td>{instantExecutionCount}</td>
</tr>
<tr>
<td>Saved Executions:</td>
<td>{instantExecutionCount - rateLimiter.state.executionCount}</td>
</tr>
<tr>
<td>% Reduction:</td>
<td>
{instantExecutionCount === 0
? '0'
: Math.round(
((instantExecutionCount -
rateLimiter.state.executionCount) /
instantExecutionCount) *
100,
)}
%
</td>
</tr>
</tbody>
</table>
<div style={{ color: '#666', fontSize: '0.9em' }}>
<p>Rate limited to 20 updates per 2 seconds</p>
</div>
<pre style={{ marginTop: '20px' }}>
{JSON.stringify(rateLimiter.store.state, null, 2)}
</pre>
</div>
)
}
const root = ReactDOM.createRoot(document.getElementById('root')!)
root.render(
<div>
<App1 />
<hr />
<App2 />
<hr />
<App3 />
</div>,
)
