@blackmagic-controller/core/dist/services/callback-hook.js

An npm module for interfacing with the Blackmagic usb/bluetooth controllers

/**
 * A simple helper that allows for the delayed registering of a listener, to avoid dependency cycles
 */
export class CallbackHook {
    #listener = null;
    emit(key, ...args) {
        if (!this.#listener)
            throw new Error('No listener setup');
        this.#listener(key, ...args);
    }
    listen(fn) {
        this.#listener = fn;
    }
}
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