toString()
var a = [1,2,3]; //定义数组
var s = a.toString(); //把数组转换为字符串
console.log(s); //返回字符串“1,2,3”
join()
var a = [1,2,3]; //定义数组
var s = a.join(','); //把数组转换为字符串
console.log(s); //返回字符串“1,2,3”
拼接空格
var a = [1,2,3]; //定义数组
var s = a + " "; //把数组转换为字符串
console.log(s); //返回字符串“1,2,3”