js字符串数组之间的转换

1、字符串转数组

var str="1,2,3,4,5" var arr= str.split(","); console.log(arr)

2、数组转字符串拼接

var arr=[1,2,3,4] var str="" arr.forEach(item=>{ str+=item+"," }) console.log(str.substring(0,str.length-1)) 3、 console.log(arr.join(","))