var a = [1,2,3,4]
var b = [3,4,5,6]
es6
let intersection = a.filter(v => b.includes(v))
let difference = a.concat(b).filter(v => !a.includes(v) || !b.inclu
错误信息: Do not use built-in or reserved HTML elements as component id: header源码:
import header from "./components/header"
import aside from "./components/aside"
import footer from
