html - 自定义文本下划线(使用 + 和 - 符号)

Question

我需要实现自定义文本装饰，见下图:

用下一个样式模拟-行很简单:

color: red;
border-bottom: 3px dashed; // 3px - just for example, 2.5 also looks fine.

但我找不到如何使用 + 符号实现下划线。实际上，我知道可以使用 background-image，但如果文本很长，它就不起作用。

如果有任何帮助，我将不胜感激。提前谢谢你。

更新:可玩的简单代码片段:

<main>
    <h1>Here goes some heading <span class="deleted">and this is deleted</span></h1>
    <p>And here goes more text. <span class="added">This was inserted.</span> More text <span class="deleted">This was deleted</span></p>
</main>

Answer 1

你可以像下面这样用渐变来做到这一点:

.deleted {
  background:
    repeating-linear-gradient(to right,red 0 4px,transparent 4px 6px) 
    bottom/100% 2px no-repeat;
}
.added {
  background:
    repeating-linear-gradient(to right,green 0px 1px,transparent 1px 5px) 
    bottom 0 left 2px/100% 5px no-repeat,
    linear-gradient(green,green) bottom 2px left 0/100% 1px no-repeat;
  padding-bottom:4px;
}

<main>
    <h1>Here goes some heading <span class="deleted">and this is deleted</span></h1>
    <p>And here goes more text. <span class="added">This was inserted.</span> More text <span class="deleted">This was deleted</span></p>
</main>

如果你想在+

之间留一些空格

.deleted {
  background:
    repeating-linear-gradient(to right,red 0 4px,transparent 4px 6px) 
    bottom/100% 2px no-repeat;
}
.added {
  background:
    repeating-linear-gradient(to right,green 0 1px,transparent 1px 7px) 
    bottom 0 left 2px/100% 5px no-repeat,
    repeating-linear-gradient(to right,green 0 5px,transparent 5px 7px) 
    bottom 2px left 0/100% 1px no-repeat;
  padding-bottom:4px;
}

<main>
    <h1>Here goes some heading <span class="deleted">and this is deleted</span></h1>
    <p>And here goes more text. <span class="added">This was inserted.</span> More text <span class="deleted">This was deleted</span></p>
</main>

它也适用于多行文本:

.deleted {
  background:
    repeating-linear-gradient(to right,red 0 4px,transparent 4px 6px) 
    bottom/100% 2px no-repeat;
}
.added {
  background:
    repeating-linear-gradient(to right,green 0 1px,transparent 1px 7px) 
    bottom 0 left 2px/100% 5px no-repeat,
    repeating-linear-gradient(to right,green 0 5px,transparent 5px 7px) 
    bottom 2px left 0/100% 1px no-repeat;
  padding-bottom:4px;
}

<main>
    <h1>Here goes some heading <span class="deleted">and this is deleted</span></h1>
    <p>And here goes more text. <span class="added">This is long long long long long long long long long long text was inserted.</span> More text <span class="deleted">This was deleted</span></p>
</main>