How can you customize the numbers in an ordered li

2019-01-02 14:39发布

站内问答 / HTML/CSS
2019 15 5

How can I left-align the numbers in an ordered list?

1.  an item
// skip some items for brevity 
9.  another item
10. notice the 1 is under the 9, and the item contents also line up

Change the character after the number in an ordered list?

1) an item

Also is there a CSS solution to change from numbers to alphabetic/roman lists instead of using the type attribute on the ol element.

I am mostly interested in answers that work on Firefox 3.

15条回答
初与友歌
2楼-- · 2019-01-02 15:08

This code makes numbering style same as headers of li content.

<style>
    h4 {font-size: 18px}
    ol.list-h4 {counter-reset: item; padding-left:27px}
    ol.list-h4 > li {display: block}
    ol.list-h4 > li::before {display: block; position:absolute;  left:16px;  top:auto; content: counter(item)"."; counter-increment: item; font-size: 18px}
    ol.list-h4 > li > h4 {padding-top:3px}
</style>

<ol class="list-h4">
    <li>
        <h4>...</h4>
        <p>...</p> 
    </li>
    <li>...</li>
</ol>
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琉璃瓶的回忆
3楼-- · 2019-01-02 15:10

Borrowed and improved Marcus Downing's answer. Tested and works in Firefox 3 and Opera 9. Supports multiple lines, too.

ol {
    counter-reset: item;
    margin-left: 0;
    padding-left: 0;
}

li {
    display: block;
    margin-left: 3.5em;          /* Change with margin-left on li:before.  Must be -li:before::margin-left + li:before::padding-right.  (Causes indention for other lines.) */
}

li:before {
    content: counter(item) ")";  /* Change 'item' to 'item, upper-roman' or 'item, lower-roman' for upper- and lower-case roman, respectively. */
    counter-increment: item;
    display: inline-block;
    text-align: right;
    width: 3em;                  /* Must be the maximum width of your list's numbers, including the ')', for compatability (in case you use a fixed-width font, for example).  Will have to beef up if using roman. */
    padding-right: 0.5em;
    margin-left: -3.5em;         /* See li comments. */
}
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高级女魔头
4楼-- · 2019-01-02 15:11

There is the Type attribute which allows you to change the numbering style, however, you cannot change the full stop after the number/letter.

<ol type="a">
    <li>Turn left on Maple Street</li>
    <li>Turn right on Clover Court</li>
</ol>
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伤终究还是伤i
5楼-- · 2019-01-02 15:11

I have it. Try the following:

<html>
<head>
<style type='text/css'>

    ol { counter-reset: item; }

    li { display: block; }

    li:before { content: counter(item) ")"; counter-increment: item; 
        display: inline-block; width: 50px; }

</style>
</head>
<body>
<ol>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
    <li>Something</li>
</ol>
</body>

The catch is that this definitely won't work on older or less compliant browsers: display: inline-block is a very new property.

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刘海飞了
6楼-- · 2019-01-02 15:13

The CSS for styling lists is here, but is basically:

li {
    list-style-type: decimal;
    list-style-position: inside;
}

However, the specific layout you're after can probably only be achieved by delving into the innards of the layout with something like this (note that I haven't actually tried it):

ol { counter-reset: item }
li { display: block }
li:before { content: counter(item) ") "; counter-increment: item }
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冷夜・残月
7楼-- · 2019-01-02 15:13

I will give here the kind of answer i usually don't like to read, but i think that as there are other answers telling you how to achive what you want, it could be nice to rethink if what you are trying to achive is really a good idea.

First, you should think if it is a good idea to show the items in a non-standard way, with a separator charater diferent than the provided.

I don't know the reasons for that, but let's suppose you have good reasons.

The ways propossed here to achive that consist in add content to your markup, mainly trough the CSS :before pseudoclass. This content is really modifing your DOM structure, adding those items to it.

When you use standard "ol" numeration, you will have a rendered content in which the "li" text is selectable, but the number preceding it is not selectable. That is, the standard numbering system seems to be more "decoration" than real content. If you add content for numbers using for example those ":before" methods, this content will be selectable, and dued to this, performing undesired vopy/paste issues, or accesibility issues with screen readers that will read this "new" content in addition to the standard numeration system.

Perhaps another approach could be to style the numbers using images, although this alternative will bring its own problems (numbers not shown when images are disabled, text size for number not changing, ...).

Anyway, the reason for this answer is not just to propose this "images" alternative, but to make people think in the consequences of trying to change the standard numeration system for ordered lists.

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