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html - 100% 宽度的子表扩展父表

问题描述

目前我正在尝试创建一个子表，其宽度可以超过父表的 100%。因此他们应该有一个滚动条。但是，当我用我的以下 css 尝试这个时，孩子有一个滚动条，并且由于某种原因扩展了父容器的宽度。如果我使用像 500px 这样的静态尺寸，它工作正常，但它以 100% 的宽度失败。

HTML

（简化）

<main class="main">
    <table>
        <tr>
            <td>...</td>
            <td>...</td>
        </tr>
        <tr>
            <td>...</td>
            <td>...</td>
        </tr>
        <tr>
            <td>...</td>
            <td>...</td>
        </tr>
    </table>
</main>

CSS

（简化）

.main {
    margin: 0 10%;
    padding: 00;
    width: 80%;
    display: table;
}

table {
    margin: 0;
    padding: 0;
    width: 100%;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
}

片段

静态宽度为 500px 的示例

<!DOCTYPE html>
<html>

<head>
  <style>
    body {
      margin: 0;
      padding: 0;
      width: 100%;
      background-color: green;
    }
    
    .main {
      margin: 0 10%;
      padding: 00;
      width: 80%;
      display: table;
    }
    
    table {
      margin: 0;
      padding: 0;
      width: 500px;
      display: block;
      overflow-x: auto;
      white-space: nowrap;
    }
  </style>
</head>

<body>
  <main class="main">
    <table>
      <tr>
        <td>A very very very veeeeeeeeeeeeeeeeeeeeery loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong line</td>
        <td>...</td>
      </tr>
      <tr>
        <td>...</td>
        <td>...</td>
      </tr>
      <tr>
        <td>...</td>
        <td>...</td>
      </tr>
    </table>
  </main>
</body>

</html>

动态宽度为 100% 的示例

<!DOCTYPE html>
<html>

<head>
  <style>
    body {
      margin: 0;
      padding: 0;
      width: 100%;
      background-color: green;
    }
    
    .main {
      margin: 0 10%;
      padding: 00;
      width: 80%;
      display: table;
    }
    
    table {
      margin: 0;
      padding: 0;
      width: 100%; /* PROBLEM */
      display: block;
      overflow-x: auto;
      white-space: nowrap;
    }
  </style>
</head>

<body>
  <main class="main">
    <table>
      <tr>
        <td>A very very very veeeeeeeeeeeeeeeeeeeeery loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong line</td>
        <td>...</td>
      </tr>
      <tr>
        <td>...</td>
        <td>...</td>
      </tr>
      <tr>
        <td>...</td>
        <td>...</td>
      </tr>
    </table>
  </main>
</body>

</html>

谢谢！

标签： htmlcss

解决方案

您需要使用table-layout:fixed; ref。自动布局可能会产生意想不到的结果。

固定表布局

使用这种（快速）算法，表格的水平布局不依赖于单元格的内容；它仅取决于表格的宽度、列的宽度以及边框或单元格间距。

作为旁注，无论有没有都会发生同样的问题width:100%

body {
  margin: 0;
  padding: 0;
  width: 100%;
  background-color: green;
}

.main {
  margin: 0 10%;
  padding: 00;
  width: 80%;
  display: table;
}

table {
  margin: 0;
  padding: 0;
  display: block;
  overflow-x: auto;
  white-space: nowrap;
}
<main class="main">
  <table>
    <tr>
      <td>A very very very veeeeeeeeeeeeeeeeeeeeery loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong line</td>
      <td>...</td>
    </tr>
    <tr>
      <td>...</td>
      <td>...</td>
    </tr>
    <tr>
      <td>...</td>
      <td>...</td>
    </tr>
  </table>
</main>
<main class="main" style="table-layout: fixed;">
  <table>
    <tr>
      <td>A very very very veeeeeeeeeeeeeeeeeeeeery loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong line</td>
      <td>...</td>
    </tr>
    <tr>
      <td>...</td>
      <td>...</td>
    </tr>
    <tr>
      <td>...</td>
      <td>...</td>
    </tr>
  </table>
</main>

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