vector-im-hydrogen-web/src/matrix/net/timeout.js

export function abortOnTimeout(createTimeout, timeoutAmount, requestResult, responsePromise) {
    const timeout = createTimeout(timeoutAmount);
    // abort request if timeout finishes first
    let timedOut = false;
    timeout.elapsed().then(
        () => {
            timedOut = true;
            requestResult.abort();
        },
        () => {}    // ignore AbortError when timeout is aborted
    );
    // abort timeout if request finishes first
    return responsePromise.then(
        response => {
            timeout.abort();
            return response;
        },
        err => {
            timeout.abort();
            // map error to TimeoutError
            if (err instanceof AbortError && timedOut) {
                throw new ConnectionError(`Request timed out after ${timeoutAmount}ms`, true);
            } else {
                throw err;
            }
        }
    );
}