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如何在 CSS 中增加带有数字和字母的有序列表:
ol.nested {
margin-bottom: 0;
counter-reset: item;
}
ol.nested li {
display: block;
position: relative;
}
ol.nested li:before {
content: counters(item, ".", decimal) ".";
counter-increment: item;
position: absolute;
margin-right:100%;
right: 10px;
}
<ol class="nested">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3
<ol class="nested">
<li>Show Item 3.a instead of 3.1</li>
<li>Show Item 3.b instead of 3.2</li>
<li>Show Item 3.c instead of 3.3</li>
</ol>
</li>
<li>Item 4
<ol class="nested">
<li>Show Item 4.a instead of 4.1</li>
<li>Show Item 4.b instead of 4.2</li>
<li>Show Item 4.c instead of 4.3</li>
</ol>
</li>
<li>Item 5</li>
</ol>
有没有办法将数字与字母(2.a、2.b、2.c)结合起来并在有序列表中递增?使用 content 和 counters-increment,列表将仅使用一种类型 decimal 或 lower-alpha 递增。如何将 decimal 与 lower-alpha 递增相结合?谢谢!
最佳答案
您可以将多个计数器与多个 counter-reset
一起使用,并将 counter-increment
应用于 ::before
和 : :之后
.nested {
margin-bottom: 0;
counter-reset: number letter; /* default reset for number and letter */
}
.nested.third li {
counter-reset: number 2; /* reset all child li in order to keep 3.x */
}
.nested.fourth {
counter-reset: letter /* reset the letter to restart at A */
}
.nested.fourth li {
counter-reset: number 3; /* reset all child li in order to keep 4.x */
}
.nested li {
display: block;
position: relative;
}
.parent li::before {
content: counter(number)".";
counter-increment: number; /* increment the numbers in general */
position: absolute;
margin-right: 100%;
right: 20px;
background: lightgreen
}
.child li::after {
content: counter(letter, lower-alpha); /* increment the letters in general */
counter-increment: letter;
position: absolute;
margin-right: 100%;
right: 10px;
background: lightblue;
width: 10px
}
<ol class="nested parent">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3
<ol class="nested child third">
<li>Show Item 3.a instead of 3.1</li>
<li>Show Item 3.b instead of 3.2</li>
<li>Show Item 3.c instead of 3.3</li>
</ol>
</li>
<li>Item 4
<ol class="nested child fourth">
<li>Show Item 4.a instead of 4.1</li>
<li>Show Item 4.b instead of 4.2</li>
<li>Show Item 4.c instead of 4.3</li>
</ol>
</li>
<li>Item 5</li>
</ol>
OP 的评论
Sorry, you're right. The numbers are exactly as I asked. Is there no way to have generic css class for the next items 5, 6, 7 and so on? Hm.
正如 @Mr Lister 在下面回答的那样,您可以做到,所以我正在更新我的答案以满足您的规范。
正如您从颜色中看到的那样,一个片段与另一个片段的区别在于,在第一个片段中,您可以更好地控制每个元素,而在这个片段中,则更为笼统。
.nested li {
display: block;
position: relative;
}
.nested {
margin-bottom: 0;
counter-reset: number;
}
.parent .nested {
counter-reset: letter;
}
.parent .nested li::before {
content: counter(number) "." counter(letter, lower-alpha);
counter-increment: letter;
background: lightblue
}
.nested li::before {
content: counter(number) ".";
counter-increment: number;
position: absolute;
margin-right: 100%;
right: 10px;
background: lightgreen
}
<ol class="nested parent">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3
<ol class="nested">
<li>Show Item 3.a instead of 3.1</li>
<li>Show Item 3.b instead of 3.2</li>
<li>Show Item 3.c instead of 3.3</li>
</ol>
</li>
<li>Item 4
<ol class="nested">
<li>Show Item 4.a instead of 4.1</li>
<li>Show Item 4.b instead of 4.2</li>
<li>Show Item 4.c instead of 4.3</li>
</ol>
</li>
<li>Item 5</li>
</ol>
关于html - 如何在有序列表中组合数字和字母?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47410573/
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