在强制使用"new“构造函数的同时，如何使结构的所有字段都可公开读取？

class MyStruct {
  constructor(field1, field2) {
    this._field1 = field1;
    this._field2 = field2;
  }
  
  getField1() {
    return this._field1;
  }
  
  getField2() {
    return this._field2;
  }
}

const myObj = new MyStruct("value1", "value2");
console.log(myObj.getField1()); // 输出：value1
console.log(myObj.getField2()); // 输出：value2

class MyStruct {
  constructor(field1, field2) {
    this.field1 = field1;
    this.field2 = field2;
  }
}

const myObj = new MyStruct("value1", "value2");
console.log(myObj.field1); // 输出：value1
console.log(myObj.field2); // 输出：value2