abort-controller-multiplexer/dist/signal.js

Combine multiple AbortControllers or AbortSignals into a single instance

export function combineSignals(...signals) {
    let sharedOnAbort = null;
    return {
        get aborted() {
            return signals.some(signal => signal.aborted);
        },
        get reason() {
            return signals.find(signal => !!signal.reason)?.reason;
        },
        get onabort() {
            return sharedOnAbort;
        },
        set onabort(onAbort) {
            sharedOnAbort = onAbort;
            for (const signal of signals) {
                signal.onabort = sharedOnAbort;
            }
        },
        // Methods:
        addEventListener: (type, callback, options) => {
            for (const signal of signals) {
                signal.addEventListener(type, callback, options);
            }
        },
        dispatchEvent: (event) => {
            return signals.some(signal => signal.dispatchEvent(event));
        },
        removeEventListener: (type, callback, options) => {
            for (const signal of signals) {
                signal.removeEventListener(type, callback, options);
            }
        },
        throwIfAborted: () => {
            for (const signal of signals) {
                signal.throwIfAborted();
            }
        }
    };
}