Question

我试图建立一个登录页面，但是当我进入该页面时，出现注销按钮，然后出现自动换词器并且注销按钮消失。

我尝试了Youtube，Google和StackOverFlow，但找不到解决方案。

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Main Page</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="icon" type="image/png" href="data:image/png;base64,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" />
    <script src="https://www.gstatic.com/firebasejs/5.9.1/firebase.js"></script>
    <style>
       a {
      position: fixed;
      top: 0;
      right: 0;
    }
        </style>


</head>
<body>
        <a href="#" onclick='logout()'>logOut</a>

        <script type='text/javascript'>

        function logout()
        {

    firebase.auth().signOut();

        }

        </script>
    <script src="fireBaze.js"></script>
    <script src="main.js"></script>
</body>
</html>

<script>
    var words = ['Choose a Language', 'Escolha um Idioma', 'wähle eine Sprache' ], // 1
    element = document.body, // 2
    currentWord = -1; //3

window.setInterval(function(){ // 4
   currentWord++; // 5
   if(currentWord > words.length) currentWord = 0; // 6
   element.textContent = words[currentWord]; // 7
}, 1000); // -- 4 
</script>

我希望有人可以告诉我我需要对我的代码做些什么！

Answer 1

您正在覆盖间隔回调中的整个身体元素。

尝试将单词添加到更具体的元素（如<span id="selectlang"></span>中，然后使用document.getElementById()进行选择。

var words = ['Choose a Language', 'Escolha um Idioma', 'wähle eine Sprache'], // 1
  element = document.getElementById('selectlang'), // 2
  currentWord = -1; //3

window.setInterval(function() { // 4
  currentWord++; // 5
  if (currentWord > words.length) currentWord = 0; // 6
  element.textContent = words[currentWord]; // 7
}, 1000); // -- 4

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title>Main Page</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" type="image/png" href="data:image/png;base64,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"
  />
  <script src="https://www.gstatic.com/firebasejs/5.9.1/firebase.js"></script>
  <style>
    a {
      position: fixed;
      top: 0;
      right: 0;
    }
  </style>


</head>

<body>
  <a href="#" onclick='logout()'>logOut</a> Other stuff
  <span id="selectlang"></span> Other stuff
  <script type='text/javascript'>
    function logout() {

      firebase.auth().signOut();

    }
  </script>
  <script src="fireBaze.js"></script>
  <script src="main.js"></script>
</body>

</html>

隐藏按钮的错误

1 个答案: