使用overflow-wrap: break-word;如:

.yourelement{
  overflow-wrap: break-word;
}

也许有人会有和我一样的问题:

我在一个带有display: flex的元素中，所以我必须使用flex-direction: column。

要使元素在后面有换行符，为它赋值:

显示:块;

块级元素之后的非浮动元素将在下一行出现。许多元素，如<p>和<div>已经是块级元素，所以您可以只使用它们。

But while this is good to know, this really depends more on the context of your content. In your example, you would not want to use CSS to force a line break. The <br /> is appropriate because semantically the p tag is the the most appropriate for the text you are displaying. More markup just to hang CSS off it is unnecessary. Technically it's not exactly a paragraph, but there is no <greeting> tag, so use what you have. Describing your content well with HTMl is way more important - after you have that then figure out how to make it look pretty.

我猜您不希望使用断点，因为它总是会断行。对吗?如果是这样，如何在你的文本中添加一个断点<br />，然后给它一个类，如<br class="hidebreak"/>，然后使用媒体查询右上方的大小，你想要它打破隐藏<br />，所以它打破在一个特定的宽度，但保持内联以上的宽度。

HTML:

<p>
The below line breaks at 766px.
</p>

<p>
 This is the line of text<br class="hidebreak"> I want to break.
</p>

CSS:

@media (min-width: 767px) {
  br.hidebreak {display:none;}
}

https://jsfiddle.net/517Design/o71yw5vd/

使用overflow-wrap: break-word;如:

.yourelement{
  overflow-wrap: break-word;
}

一个现代而简单的解决方案是这样设置宽度:

宽度:min-content;

这个CSS规则主要适用于文本内容，但不仅限于: https://developer.mozilla.org/en-US/docs/Web/CSS/min-content

p { 保证金:20 px; 颜色:# 222; font-family:'世纪哥特式'，sans-serif; 边框:2px虚线灰色; 填充:3 px; ｝ .max { 宽度:max-content; ｝ .min { 宽度:min-content; ｝ <！DOCTYPE html > < html lang =“en”> <头/ > <身体> <p class="max">最大宽度</p> <p class="min">最小可用宽度</p> < /身体> < / html >