waitFor()

waitFor(predicate, maxChecks?, checkIntervalMs?): Promise<void>

Defined in: utils/waitFor.ts:16 

Polls a predicate until it returns a truthy value.

Parameters

predicate

() => boolean | undefined

Condition to check on every attempt.

maxChecks?

number = 50

Maximum number of attempts. Defaults to 50.

checkIntervalMs?

number = 200

Delay between attempts in milliseconds. Defaults to 200.

Returns

Promise<void>

A promise that resolves as soon as the predicate is truthy.

Example

// Wait up to 10 seconds (50 × 200 ms) for an injected provider.
await waitFor(() => typeof window !== 'undefined' && 'ethereum' in window);

Throws

“Predicate not fulfilled in time” if the predicate is still falsy after maxChecks attempts.