使接受的答案响应小屏幕时，小于固定宽度。

HTML:

<table>
  <tr>
    <th>header 1</th>
    <th>header 234567895678657</th>
  </tr>
  <tr>
    <td>data asdfasdfasdfasdfasdf</td>
    <td>data 2</td>
  </tr>
</table>

CSS

table{
    border: 1px solid black;
    table-layout: fixed;
    max-width: 600px;
    width: 100%;
}

th, td {
    border: 1px solid black;
    overflow: hidden;
    max-width: 300px;
    width: 100%;
}

JS小提琴

https://jsfiddle.net/w9s3ebzt/

您需要在相应的CSS中编写这些内容

table-layout:fixed;

只需在<td>或<th>定义宽度<div>内添加<div>标签。 这对你有帮助。别的都不管用。

eg.

<td><div style="width: 50px" >...............</div></td>

在餐桌上找到合适的尺寸是很棘手的。唯一对我有效的方法是使用表格布局:fixed;与每条线的指定宽度相结合。和宽度:auto;在你不介意生长的一列上。

下面是一个使用无类表的示例。如果您正在处理一些动态列，则需要一个类化版本。

table { table-layout: fixed; } th,td { text-align: left; vertical-align: top; /* use this in the columns where you're not concerned with new lines */ word-break: break-word; } th:first-child, th:last-child { width: 5ch; text-align: center; } th:nth-child(n + 2):nth-child(-n + 3) { background: red; width: 25%; } th:nt-child(4) { background: blue; width: auto; } <table> <thead> <tr> <th>ID</th> <th>First Name</th> <th>Last Name</th> <th>Description</th> <th>Age</th> </tr> </thead> <tbody> <tr> <th>1</th> <th>John</th> <th>Smith</th> <th>Vivamus fermentum elit purus, eget egestas nunc convallis ac. Vestibulum faucibus dolor nunc, vitae rutrum mauris porta at. Ut id ante quis lectus consectetur interdum vel in leo. Ut ut convallis ipsum, quis aliquet erat. Maecenas ipsum dolor, rhoncus et ultrices a</th> <th>30</th> </tr> <tr> <th>2</th> <th>John</th> <th>Smith</th> <th>Vivamus fermentum elit purus, eget egestas nunc convallis ac. Vestibulum faucibus dolor nunc, vitae rutrum mauris porta at. Ut id ante quis lectus consectetur interdum vel in leo. Ut ut convallis ipsum, quis aliquet erat. Maecenas ipsum dolor, rhoncus et ultrices a</th> <th>30</th> </tr> <tr> <th>3</th> <th>John</th> <th>Smith</th> <th>Vivamus fermentum elit purus, eget egestas nunc convallis ac. Vestibulum faucibus dolor nunc, vitae rutrum mauris porta at. Ut id ante quis lectus consectetur interdum vel in leo. Ut ut convallis ipsum, quis aliquet erat. Maecenas ipsum dolor, rhoncus et ultrices a</th> <th>30</th> </tr> <tr> <th>4</th> <th>John</th> <th>Smith</th> <th>Vivamus fermentum elit purus, eget egestas nunc convallis ac. Vestibulum faucibus dolor nunc, vitae rutrum mauris porta at. Ut id ante quis lectus consectetur interdum vel in leo. Ut ut convallis ipsum, quis aliquet erat. Maecenas ipsum dolor, rhoncus et ultrices a</th> <th>30</th> </tr> </tbody> </table>

我用了这个

.app_downloads_table tr td:first-child {
    width: 75%;
}

.app_downloads_table tr td:last-child {
    text-align: center;
}

凯旋的想法是对的。这是正确的代码…

<style type="text/css">
  th.first-col > div, 
  td.first-col > div {
    overflow:hidden;
    white-space:nowrap;
    width:100px
  }
</style>

<table>
  <thead><tr><th class="first-col"><div>really long header</div></th></tr></thead>
  <tbody><tr><td class="first-col"><div>really long text</div></td></tr></tbody>
</table>