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John
John

Reputation: 21957

Number nested ordered lists in HTML

I have a nested ordered list.

<ol>
  <li>first</li>
  <li>second
  <ol>
    <li>second nested first element</li>
    <li>second nested secondelement</li>
    <li>second nested thirdelement</li>
  </ol>
  </li>
  <li>third</li>
  <li>fourth</li>
</ol>

Currently the nested elements start back from 1 again, e.g.

  1. first
  2. second
    1. second nested first element
    2. second nested second element
    3. second nested third element
  3. third
  4. fourth

What I want is for the second element to be numbered like this:

  1. first

  2. second

    2.1. second nested first element

    2.2. second nested second element

    2.3. second nested third element

  3. third
  4. fourth

Is there a way of doing this?

Upvotes: 40

Views: 28886

Answers (5)

Jakub Jirutka
Jakub Jirutka

Reputation: 10847

None of solutions on this page works correctly and universally for all levels and long (wrapped) paragraphs. It’s really tricky to achieve a consistent indentation due to variable size of marker (1., 1.2, 1.10, 1.10.5, …); it can’t be just “faked,” not even with a precomputed margin/padding for each possible indentation level.

I finally figured out a solution that actually works and doesn’t need any JavaScript.

It’s tested on Firefox 32, Chromium 37, IE 9 and Android Browser. Doesn't work on IE 7 and previous.

CSS:

ol {
  list-style-type: none;
  counter-reset: item;
  margin: 0;
  padding: 0;
}

ol > li {
  display: table;
  counter-increment: item;
  margin-bottom: 0.6em;
}

ol > li:before {
  content: counters(item, ".") ". ";
  display: table-cell;
  padding-right: 0.6em;    
}

li ol > li {
  margin: 0;
}

li ol > li:before {
  content: counters(item, ".") " ";
}

Example: example

Try it on jsFiddle, fork it on Gist.

Upvotes: 8

oleckkxs
oleckkxs

Reputation: 1310

Acctualy if you used sass/scss in you project for styling you can use mixin for this . For styling this nested list you need only two lines of sass code.

@import 'nested_list'
+nested_list('nested', 2)

<ol>
  <li>first</li>
  <li>second
      <ol class="nested-2">
          <li>second nested first element</li>
          <li>second nested secondelement</li>
          <li>second nested thirdelement</li>
      </ol>
  </li>
  <li>third</li>
  <li>fourth</li>
</ol>

Full example you can clone/watch from git repo or generated css on fidle

Upvotes: 0

Alexandre
Alexandre

Reputation: 1285

I know it is late to reply, but I just found an example of doing that using CSS. Add this to you CSS section (or file):

ol.nested
{
    counter-reset: item
}
li.nested
{
    display: block
}
li.nested:before
{
    content: counters(item, ".") ". ";
    counter-increment: item
}

Here is an example of how your list code would look like:

<ol class="nested">
<li class="nested">item 1</li>
<li class="nested">item 2
    <ol class="nested">
        <li class="nested">subitem 1</li>
        <li class="nested">subitem 2</li>
    </ol></li>
<li class="nested">item 3</li>
</ol>

HTH

Upvotes: 35

BalusC
BalusC

Reputation: 1109865

Here's an example which works in all browsers. The pure CSS approach works in the real browsers (i.e. everything but IE6/7) and the jQuery code is to cover the unsupported. It's in flavor of an SSCCE, you can just copy'n'paste'n'run it without changes.

<!doctype html>
<html lang="en">
    <head>
        <title>SO question 2729927</title>
        <script src="http://code.jquery.com/jquery-latest.min.js"></script>
        <script>
            $(document).ready(function() {
                if ($('ol:first').css('list-style-type') != 'none') { /* For IE6/7 only. */
                    $('ol ol').each(function(i, ol) {
                        ol = $(ol);
                        var level1 = ol.closest('li').index() + 1;
                        ol.children('li').each(function(i, li) {
                            li = $(li);
                            var level2 = level1 + '.' + (li.index() + 1);
                            li.prepend('<span>' + level2 + '</span>');
                        });
                    });
                }
            });
        </script>
        <style>
            html>/**/body ol { /* Won't be interpreted by IE6/7. */
                list-style-type: none;
                counter-reset: level1;
            }
            ol li:before {
                content: counter(level1) ". ";
                counter-increment: level1;
            }
            ol li ol {
                list-style-type: none;
                counter-reset: level2;
            }
            ol li ol li:before {
                content: counter(level1) "." counter(level2) " ";
                counter-increment: level2;
            }
            ol li span { /* For IE6/7. */
                margin: 0 5px 0 -25px;
            }
        </style>
    </head>
    <body>
        <ol>
            <li>first</li>
            <li>second
                <ol>
                    <li>second nested first element</li>
                    <li>second nested second element</li>
                    <li>second nested third element</li>
                </ol>
            </li>
            <li>third</li>
            <li>fourth</li>
        </ol>
    </body>
</html>

Upvotes: 39

Pops
Pops

Reputation: 30868

This is not possible in pure HTML/CSS. See BalusC's answer for a great thinking-out-of-the-box solution. A list of numbering types can be found at w3schools, here.

The closest option I was able to find is use of the value attribute, from w3c, but the following markup

<ol>
    <li value="30">
        makes this list item number 30.
    </li>
    <li value="40">
        makes this list item number 40.
    </li>
    <li>
        makes this list item number 41.
    </li>
    <li value="2.1">
        makes this list item number ...
    </li>
    <li value="2-1">
        makes this list item number ...
    </li>
</ol>

produces a list numbered 30, 40, 41, 2 and 2.

As John already pointed out, your best bet is going to be scripting, in this situation.

Upvotes: 0

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