freeCodeCamp/change-text-with-click-events.md at 4a74567986d8de748f954e8957adc7613e85193f

Oliver Eyton-Williams 4a74567986 fix: remove title from Chinese chals

2020-10-06 23:10:08 +05:30

3.0 KiB

Raw Blame History

id, challengeType, forumTopicId, localeTitle

id	challengeType	forumTopicId	localeTitle
587d7fad367417b2b2512be2	6	301500	通过单击事件更改文本

Description

当点击事件发生时，你可以使用 JavaScript 更新 HTML 元素。例如，当用户点击 "Get Message" 按钮时，它将改变类名message元素的文本为 "Here is the message"。通过在点击事件内添加以下代码实现： document.getElementsByClassName('message')[0].textContent="Here is the message";

Instructions

在onclick事件处理器中添加代码，改变message元素内的文字为 "Here is the message"。

Tests

tests:
  - text: 你的代码应该使用<code>document.getElementsByClassName</code>方法来选择类名为<code>message</code>的元素，然后将其<code>innerHTML</code>改为给定文字。
    testString: assert(code.match(/document\s*\.getElementsByClassName\(\s*?('|")message\1\s*?\)\[0\]\s*\.textContent\s*?=\s*?('|")Here is the message\2/g));

Challenge Seed

<script>
  document.addEventListener('DOMContentLoaded', function(){
    document.getElementById('getMessage').onclick = function(){
      // 在这行下面添加代码


      // 在这行上面添加代码
    }
  });
</script>

<style>
  body {
    text-align: center;
    font-family: "Helvetica", sans-serif;
  }
  h1 {
    font-size: 2em;
    font-weight: bold;
  }
  .box {
    border-radius: 5px;
    background-color: #eee;
    padding: 20px 5px;
  }
  button {
    color: white;
    background-color: #4791d0;
    border-radius: 5px;
    border: 1px solid #4791d0;
    padding: 5px 10px 8px 10px;
  }
  button:hover {
    background-color: #0F5897;
    border: 1px solid #0F5897;
  }
</style>

<h1>Cat Photo Finder</h1> 
<p class="message box">
  The message will go here
</p>
<p>
  <button id="getMessage">
    Get Message
  </button>
</p>

Solution

<script>
  document.addEventListener('DOMContentLoaded',function(){
    document.getElementById('getMessage').onclick = function(){
      // Add your code below this line
      document.getElementsByClassName('message')[0].textContent = "Here is the message";
      // Add your code above this line
    }
  });
</script>

<style>
  body {
    text-align: center;
    font-family: "Helvetica", sans-serif;
  }
  h1 {
    font-size: 2em;
    font-weight: bold;
  }
  .box {
    border-radius: 5px;
    background-color: #eee;
    padding: 20px 5px;
  }
  button {
    color: white;
    background-color: #4791d0;
    border-radius: 5px;
    border: 1px solid #4791d0;
    padding: 5px 10px 8px 10px;
  }
  button:hover {
    background-color: #0F5897;
    border: 1px solid #0F5897;
  }
</style>

<h1>Cat Photo Finder</h1>
<p class="message">
  The message will go here
</p>
<p>
  <button id="getMessage">
    Get Message
  </button>
</p>

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