使用word-wrap:break-word属性以及所需的宽度。主要是, 宽度以像素为单位，而不是百分比。

width: 200px;
word-wrap: break-word;

在引导3中，确保空白没有设置为“nowrap”。

div {
  width: 200px;
  word-break: break-all;
  white-space: normal;
}

试试这个:

div {
    width: 200px;
    word-wrap: break-word;
}

我用过自举法。 我的html代码看起来像..

<div class="container mt-3" style="width: 100%;">
  <div class="row">
    <div class="col-sm-12 wrap-text">
      <h6>
        text content
      </h6>
    </div>
  </div>
</div>

CSS

.wrap-text {
     text-align:justify;
}

你可以使用这个CSS

p {
  width: min-content;
  min-width: 100%;
}

在HTML正文中尝试:

<table>
    <tr>
        <td>
            <div style="word-wrap: break-word; width: 800px">
                Hello world, how are you? More text here to see if it wraps after a long while of writing and it does on Firefox but I have not tested it on Chrome yet. It also works wonders if you have a medium to long paragraph. Just avoid writing in the CSS file that the words have to break-all, that's a small tip.
            </div>
        </td>
    </tr>
</table>

在CSS正文尝试:

background-size: auto;

table-layout: fixed;