javascript中的字符串和数组的互转

javascript中的数组转换成字符串用toString()，或者用join()。

将数组和字符串用+连接，赋给一个变量，这个变量自动转变成字符串了。

字符串转换成数组用split(',')

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>js中数组和字符串的互转</title>
</head><body><script>var msgsnew = ["test", "test", "test", "test", "test"];//var tstr=msgsnew.join()        var tstr = msgsnew.join(',');    //数组转字符串
        console.log("tstr", tstr);var tstrtwo = msgsnew.toString();       //数组转字符串var tstrthree = "可以转字符串的" + msgsnew    //js中的+
        console.log("+后转变成字符串的", tstrthree, typeof tstrthree);console.log("数组:" + msgsnew + ":" + (msgsnew instanceof Array), "数组转字符串:" + tstrtwo + ":" + (tstrtwo instanceof Array));console.log(msgsnew);var tarra = tstr.split(',');    //字符串转数组
console.log(msgsnew instanceof Array, typeof tstr, tarra);</script></body></html>