js的几个小技巧

1、解构原始数据

  const rawUser = {
       name: 'Allan',
       age: '25',
       sex: "man"
   };

   let user = {};
   ({ name: user.name, age: user.age} = rawUser);
   console.log(user);  // {name: "Allan", age: "25"}

2、动态增加属性

    const getUser = (emailIncluded) => {
        return {
            name: 'John',
            surname: 'Doe',
            ...emailIncluded && { email : '[email protected]' }
        }
    }

    const user = getUser(true);
    console.log(user); // outputs { name: "John", surname: "Doe", email: "[email protected]" }

    const userWithoutEmail = getUser(false);
    console.log(userWithoutEmail); // outputs { name: "John", surname: "Doe" }