export function checkType(type: string) {
  return (target: object, property: string) => {
    let _val = target[property];
    delete target[property];

    Object.defineProperty(target, property, {
      set: function set(newVal) {
        const newValType = typeof newVal;
        if (newValType !== type) {
          throw new TypeError(`Invalid ${property} type (${newValType}). Should be ${type}.`);
        }
        _val = newVal;
      },
      get: function get() {
        return _val;
      },
      enumerable: true,
      configurable: true,
    });
  };
}

@Input() @checkType('number') public defautDate: number;