import { executeCallback } from 'localforage-driver-commons';
export function key(idx, callback) {
    const promise = this.ready().then(() => {
        let result;
        try {
            result = this._dbInfo.mStore.key(idx);
            if (result === undefined) {
                result = null;
            }
        }
        catch {
            result = null;
        }
        return result;
    });
    executeCallback(promise, callback);
    return promise;
}
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