如何在不使用if then或case swtich的情况下访问对象[javascript]

const obj = {
  method1() {
    console.log("Method 1");
  },
  method2() {
    console.log("Method 2");
  }
};

const methodName = "method1";
obj[methodName](); // 输出 "Method 1"

const obj = {
  prop1: "Property 1",
  prop2: "Property 2"
};

const propName = "prop1";
console.log(obj[propName]); // 输出 "Property 1"

const obj = {
  method1() {
    console.log("Method 1");
  },
  method2() {
    console.log("Method 2");
  }
};

const methodMap = {
  method1: obj.method1,
  method2: obj.method2
};

const methodName = "method1";
methodMap[methodName](); // 输出 "Method 1"