<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>扩展运算符</title> </head> <body> <script> let {log} = console; let arr = [1,2,3,4]; let fun = (a,b,c) =>{ return a+b+c } log(fun(...arr)); // 6 let fun1 = (...a) =>{ return a[0]+a[1]+a[2] } log(fun1(...arr)); // 扩展运算符如果运用到函数参数中,直接或间接的会根据对应的来接受。 </script> </body> </html>