为什么不打印此对象属性？ （错字）[关闭]

Question

function User()
{
    this.username = null;
    this.password = null;
    this.first = null;
    this.last = null;
}

var userList = new Array();

userList[0] = new User();
userList[1] = new User();
userList[2] = new User();

userList[0].username = "Georgie19";
userList[1].username = "PaulC-87";
uesrList[2].username = "JamesHat";

userList[0].password = "georgepass101";
userList[1].password = "adminpaul-13";
userList[2].password = "jamesH7";

userList[0].first = "George";
userList[1].first = "Paul";
userList[2].first = "James";

userList[0].last = "Hordin";
userList[1].last = "Corman";
userList[2].last = "Haquel";

document.write(userList[0].username);

当我将其放入浏览器时，它显示为空白。我已经尝试摆脱我不使用的东西，它会自动工作。我实在想不通。我怀疑这是我根本找不到的语法错误，请帮忙。 PS：这不是我的 HTML 的问题

Answer 1

userList 这一行的拼写错误会导致脚本错误，从而导致您的代码无法运行：

uesrList[2].username = "JamesHat";

请学会在调试控制台中查看您自己的脚本错误，并在此处清楚地说明这一错误。

修复该错误后，您的脚本运行良好。

工作sn-p：

function User()
{
    this.username = null;
    this.password = null;
    this.first = null;
    this.last = null;
}

var userList = new Array();

userList[0] = new User();
userList[1] = new User();
userList[2] = new User();

userList[0].username = "Georgie19";
userList[1].username = "PaulC-87";
userList[2].username = "JamesHat";

userList[0].password = "georgepass101";
userList[1].password = "adminpaul-13";
userList[2].password = "jamesH7";

userList[0].first = "George";
userList[1].first = "Paul";
userList[2].first = "James";

userList[0].last = "Hordin";
userList[1].last = "Corman";
userList[2].last = "Haquel";

document.write(userList[0].username);