我的代码朴素之道

组值的代替// badlet a = 1, b = 2let temp = aa = bb = temp// goodlet a = 1, b = 2[b, a] = [a, b]13.有意识对象// badsetForm (person) { this.name = person.name this.age = person.age}// goodsetForm ({name, age}) { this.name = name this.age = age }14.有意识时一个大比较简单命名

有的后侧返回的键名特别长，你可以这样天和

// badsetForm (data) { this.one = data.aaa_bbb_ccc_ddd this.two = data.eee_fff_ggg}// goodsetForm ({aaa_bbb_ccc_ddd, eee_fff_ggg}) { this.one = aaa_bbb_ccc_ddd this.two = eee_fff_ggg}// bestsetForm ({aaa_bbb_ccc_ddd: one, eee_fff_ggg: two}) { this.one = one this.two = two}15.有意识时所设默认值// badsetForm ({name, age}) { if (!age) age = 16 this.name = name this.age = age }// goodsetForm ({name, age = 16}) { this.name = name this.age = age}16.||接地符所设默认值let person = { name: '张三', age: 38}let name = person.name || '佚名'17.&&接地符推断仰赖的键应该假定防止报错'xxx of undfined'let person = { name: '张三', age: 38, children: { name: '张小三' }}let childrenName = person.children && person.childre.name18.正则表达式拼接常用${}let person = { name: 'LiMing', age: 18}// badfunction sayHi (obj) { console.log('大家好，我叫' + person.name = '，我去年' + person.age + '了')}// goodfunction sayHi (person) { console.log(----大家好，我叫${person.name}，我去年${person.age}了----)}// bestfunction sayHi ({name, age}) { console.log(----大家好，我叫${name}，我去年${age}了----)}19.函数常用圆点函数let arr [18, 19, 20, 21, 22]// badfunction findStudentByAge (arr, age) { return arr.filter(function (num) { return num === age })}// goodlet findStudentByAge = (arr, age)=> arr.filter(num => num === age)20.函数表达式校验// badlet findStudentByAge = (arr, age) => { if (!age) throw new Error('表达式不用为空') return arr.filter(num => num === age)}// goodlet checkoutType = () => { throw new Error('表达式不用为空')}let findStudentByAge = (arr, age = checkoutType()) => arr.filter(num => num === age)

作者：mmdjj

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