javascript - javascript 中的意外标记 <

Question

这是我的 js 文件，其中我有一个意外的 token <错误，我已验证来自 jshint 的代码，没有任何内容可以解决该问题。

我尝试将js放入不同的文件中，也尝试将html放入同一文件中，但没有解决错误仍然存​​在

function ajax() {
  var XMLHttpRequestObject = false;
  if (window.XMLHttpRequest) {
    XMLHttpRequestObject = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
  }
  return XMLHttpRequestObject;
}

function login() {
  var wait = document.getElementById('wait-img').style;
  wait.visibility = "visible";
  document.getElementById('fade').style.display = 'block';
  var email = document.getElementById('username').value;
  var password = document.getElementById('password').value;
  if (email === '' || password === '') {
    document.getElementById('error').innerHTML = 'Please fill out all details';
    wait.visibility = "hidden";
    document.getElementById('fade').style.display = 'none';
    return;
  }
  var data = "email=" + email + "&password=" + password + "&x=login";
  var xml = ajax();
  if (xml) {
    xml.open("POST", "login1.php");
    xml.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xml.onreadystatechange = function() {
      if (xml.readyState == 4 && xml.status == 200) {
        var reply = JSON.parse(xml.responseText);
        if (reply == 'failure') {
          document.getElementById('error').innerHTML = 'Email or password is incorrect';
        } else
          window.location = 'profile.php?id=' + reply;
        wait.style.visibility = "hidden";
        document.getElementById('fade').style.display = 'none';
      }
    };
    xml.send(data);
  }
}

function signup() {
  var wait = document.getElementById('wait-img').style;
  wait.visibility = "visible";
  document.getElementById('fade').style.display = 'block';
  var email = document.getElementById('email').value;
  var password = document.getElementById('psswd').value;
  var phone = document.getElementById('phone').value;
  var confirm = document.getElementById('confirm').value;
  if (email === '' || password === '' || phone === '' || confirm === '') {
    document.getElementById('error').innerHTML = 'Please fill out all details';
    wait.visibility = "hidden";
    document.getElementById('fade').style.display = 'none';
    return;
  }
  if (password != confirm) {
    document.getElementById('error').innerHTML = 'Password did not match';
    wait.visibility = "hidden";
    document.getElementById('fade').style.display = 'none';
    return;
  }
  var data = "email=" + email + "&password=" + password + "&phone=" + phone + "&x=signup";
  var xml = ajax();
  if (xml) {
    xml.open("POST", "signup.php");
    xml.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xml.onreadystatechange = function() {
      if (xml.readyState == 4 && xml.status == 200) {
        var reply = JSON.parse(xml.responseText);
        if (reply == 'failure') {
          document.getElementById('error').innerHTML = 'Sorry something went wrong';
        } else
          window.location = 'profile.php?id=' + reply;
        wait.visibility = "hidden";
        document.getElementById('fade').style.display = 'none';
      }

    };
    xml.send(data);
  }
}

更新:错误出现在该文件的第 41 行。

Answer 1

错误必须出现在您正在导入的 JSON 文件中(在 JSON.parse(xml.responseText);

使用 try-catch 确保导入的文件具有正确的 JSON 语法。

尝试{ var回复=JSON.parse(xml.responseText); } 捕获(e){ console.log(e,xml.responseText) }

这将帮助您调试错误。