循环对象

使用Object.values快速获取对象键值

let obj = {
    a: 1,
    b: 2
}
// bad
let values = []
for (key in obj) {
    values.push(obj[key])
}

// good
let values = Object.values(obj) // [1, 2]

使用Object.keys快速获取对象键名

let obj = {
    a: 1,
    b: 2
}
// bad
let keys = []
for (value in obj) {
    keys.push(value)
}

// good
let keys = Object.keys(obj) // ['a', 'b']

解构时设置默认值

setForm ({name, age}) {
    if (!age) age = 16
    this.name = name
    this.age = age 
}

// good
setForm ({name, age = 16}) {
    this.name = name
    this.age = age 
}