无法通过动态字符串访问'this‘对象

const obj = {
  name: 'Alice',
  greet: function() {
    return `Hello, ${this.name}`;
  }
};

const methodName = 'greet';
console.log(obj[methodName]()); // 输出: Hello, undefined

const obj = {
  name: 'Alice',
  greet: () => {
    return `Hello, ${this.name}`;
  }
};

const methodName = 'greet';
console.log(obj[methodName]()); // 输出: Hello, Alice

const obj = {
  name: 'Alice',
  greet: function() {
    return `Hello, ${this.name}`;
  }
};

const methodName = 'greet';
console.log(obj[methodName].bind(obj)()); // 输出: Hello, Alice

const obj = {
  name: 'Alice',
  greet: function() {
    const self = this;
    return () => `Hello, ${self.name}`;
  }
};

const methodName = 'greet';
console.log(obj[methodName]()()); // 输出: Hello, Alice