throttle

function throttle<TFn>(fn, initialOptions): (...args) => void;

Defined in: throttler.ts:374

Creates a throttled function that limits how often the provided function can execute.

This synchronous version is lighter weight and often all you need - upgrade to asyncThrottle when you need promises, retry support, abort/cancel capabilities, or advanced error handling.

Throttling ensures a function executes at most once within a specified time window, regardless of how many times it is called. This is useful for rate-limiting expensive operations or UI updates.

The throttled function can be configured to execute on the leading and/or trailing edge of the throttle window via options.

For handling bursts of events, consider using debounce() instead. For hard execution limits, consider using rateLimit().

State Management:

• Uses TanStack Store for reactive state management
• Use initialState to provide initial state values when creating the throttler
• Use onExecute callback to react to function execution and implement custom logic
• The state includes execution count, last execution time, pending status, and more
• State can be accessed via the underlying Throttler instance's store.state property
• When using framework adapters (React/Solid), state is accessed from the hook's state property

Type Parameters

TFn

TFn extends AnyFunction

Parameters

fn

TFn

initialOptions

ThrottlerOptions<TFn>

Returns

(...args): void;

Attempts to execute the throttled function. The execution behavior depends on the throttler options:

• If enough time has passed since the last execution (>= wait period):

  • With leading=true: Executes immediately
  • With leading=false: Waits for the next trailing execution

• If within the wait period:

  • With trailing=true: Schedules execution for end of wait period
  • With trailing=false: Drops the execution

Parameters

args

...Parameters<TFn>

Returns

void

Example

const throttled = new Throttler(fn, { wait: 1000 });

// First call executes immediately
throttled.maybeExecute('a', 'b');

// Call during wait period - gets throttled
throttled.maybeExecute('c', 'd');

Example

// Basic throttling - max once per second
const throttled = throttle(updateUI, { wait: 1000 });

// Configure leading/trailing execution
const throttled = throttle(saveData, {
  wait: 2000,
  leading: true,  // Execute immediately on first call
  trailing: true  // Execute again after delay if called during wait
});