membuat-promise-based-dialog#04

methods: {
    open() {
      return new Promise((resolve, reject) => {
        this.resolve = resolve;
        this.reject = reject;

        this.dialog = true;
      });
    },
    accept(str) {
      this.dialog = false;
      this.resolve(str);
    },
    cancel(str) {
      this.dialog = false;
      this.reject(str);
    }
}