@benev/slate/x/flatstate/parts/stopper.js

frontend web stuff

export class Stopper {
    #map = new Map;
    stop(symbol) {
        const stop = this.#map.get(symbol);
        if (stop) {
            this.#map.delete(symbol);
            stop();
        }
    }
    add(symbol, fun) {
        this.#map.set(symbol, fun);
    }
}
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