File size: 1,591 Bytes
1e92f2d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | /**
* Callback type for the timeout function.
* Receives current time in milliseconds as an argument.
*/
export type CallbackType = (now: number) => void;
/**
* A function that, when called, cancels the timeout.
*/
export type CancelableTimeout = () => void;
export interface TimeoutController {
/**
* Sets a timeout that executes a callback after a specified delay.
* Allows setting multiple timeouts and provides a way to cancel them independently.
* @param callback - The function to execute after the delay. Receives the current time in milliseconds as an argument.
* @param delay (optional) - The time in milliseconds to wait before executing the callback. Defaults to 0.
*/
setTimeout(callback: CallbackType, delay?: number): CancelableTimeout;
}
export class RequestAnimationFrameTimeoutController implements TimeoutController {
setTimeout(callback: CallbackType, delay: number = 0): CancelableTimeout {
const startTime = performance.now();
let requestId: number | null = null;
const executeCallback = (now: number): void => {
if (now - startTime >= delay) {
callback(now);
// tests fail without the extra if, even when five lines below it's not needed
// TODO finish transition to the mocked timeout controller and then remove this condition
} else if (typeof requestAnimationFrame === 'function') {
requestId = requestAnimationFrame(executeCallback);
}
};
requestId = requestAnimationFrame(executeCallback);
return () => {
cancelAnimationFrame(requestId);
};
}
}
|