增强对象的一些方法

属性值的简写

        let name ='123'
        let person={
            name:name
        }

        let person={
            name
        }

      function renderName(name) {
        return {
          name
        };
      }

      let person = renderName("huang");
      console.log(person.name);//'huang'

可计算属性（可修改属性）

        let nameKey = "name";
        let ageKey = "age";

        let person = {};
        nameKey = "NAME";
        person[nameKey] = "huang";
        person[ageKey] = 23;
        console.log(person);//NAME: "huang"
                            //age: 23

简写方法名

       let person = {
        sayName: function (name) {
          console.log(name);
        },
      };

      let person = {
        sayName(name) {
          console.log(name);
        },
      };