abort-utils/dist/on-abort.js

Utility functions to use and combine `AbortSignal` and `AbortController` with Promises

function addListeners(signal, handles) {
    // Add one listener per `handle` so that errors don't block other listeners
    for (const handle of handles) {
        const options = { once: true };
        if ('disconnect' in handle) {
            // Like MutationObserver
            signal.addEventListener('abort', handle.disconnect.bind(handle), options);
        }
        else if ('abort' in handle) {
            // Like AbortController
            signal.addEventListener('abort', handle.abort.bind(handle), options);
        }
        else if (typeof handle === 'function') {
            signal.addEventListener('abort', handle, options);
        }
        else {
            throw new TypeError('Invalid AbortSignal handle type');
        }
    }
}
export function onAbort(
// Accept `undefined` to replicate the common `signal?.addEventListener()` pattern
signal, ...handles) {
    if (!signal) {
        return;
    }
    const trueSignal = signal instanceof AbortController ? signal.signal : signal;
    if (trueSignal.aborted) {
        // This pattern ensures that handlers are treated the same way even if the
        // signal is already aborted. AbortSignal.abort()/.timeout() don't work the same way
        const controller = new AbortController();
        addListeners(controller.signal, handles);
        controller.abort(controller.signal.reason);
    }
    else {
        addListeners(trueSignal, handles);
    }
}