扩展运算符(...)用于取出参数对象或者数组中的所有可遍历属性,拷贝到当前对象之中
案例:
let a = [1,2,3]
let b = [4,5,6]
let c = []
let c = [...a,...b] //log打印c = [1,2,3,4,5,6]
let c = [...a,...b,7,8] //c = [1,2,3,4,5,6,7,8]
扩展运算符(...)用于取出参数对象或者数组中的所有可遍历属性,拷贝到当前对象之中
案例:
let a = [1,2,3]
let b = [4,5,6]
let c = []
let c = [...a,...b] //log打印c = [1,2,3,4,5,6]
let c = [...a,...b,7,8] //c = [1,2,3,4,5,6,7,8]