「JS」

全篇答案密码为pwd

1. 对象的赋值与拷贝 输出是？const members = [ person ]；person = null

let person = { name: 'Lydia' }
const members = [ person ]
person = null
console.log(members)

基础语法 输出是？!typeof ‘aaa’ === ‘string’

const name = 'Lydia Hallie'
console.log(!typeof name === 'object')
console.log(!typeof name === 'string')

作用域 代码输出是什么

var a = 10;
(function() {
  console.log(a);
  a = 5;
  console.log(window.a);
  var a = 20;
  console.log(a);
})()

api ['1', '2', '3'].map(parseInt) what & why

防抖、节流 什么是防抖和节流？有什么区别？如何实现？