javascript - 重新运行javascript代码，而无需再次编写

我在Node.js中编码Javascript，我有这个功能。

  function addaccountfunc(usrnew, passnew) {
  console.log(" Forgotten passwords/usernames can NOT be reset!")
  if (usrnew === usr ){
  console.log("Sorry, that username is taken, would you like to chose another?")

    }
     var usrnew = prompt("Chose a username: ")

     if (passnew != password){
     var passnew = prompt("Chose a password:")
    }


    }

问题是我想继续运行usrnew提示符，直到输入的用户名不等于数据库中已有的用户名，我该怎么做？

最佳答案

您可以随时使用while循环：

var usrnew = prompt("Choose a username: ")
while(usrnew === usr) {
    console.log("Sorry, that username is taken, would you like to choose another?")
    var usrnew = prompt("Choose a username: ")
}