How to semantically add heading to a list

问题:

This has been bothering me for a while, and I'm wondering if there's any consensus on how to do this properly. When I'm using an HTML list, how do I semantically include a header for the list?

One option is this:

<h3>Fruits I Like:</h3>
<ul>
    <li>Apples</li>
    <li>Bananas</li>
    <li>Oranges</li>
</ul>

but semantically the <h3> heading is not explicitly associated with the <ul>

Another option is this:

<ul>
    <li><h3>Fruits I Like:</h3></li>
    <li>Apples</li>
    <li>Bananas</li>
    <li>Oranges</li>
</ul>

but this seems a bit dirty, as the heading is not really one of the list items.

This option is not allowed by the W3C:

<ul>
    <h3>Fruits I Like:</h3>
    <li>Apples</li>
    <li>Bananas</li>
    <li>Oranges</li>
</ul>

as <ul>'s can only contain one or more <li>'s

The old "list heading" <lh> makes the most sense

<ul>
    <lh>Fruits I Like:</lh>
    <li>Apples</li>
    <li>Bananas</li>
    <li>Oranges</li>
</ul>

but of course it's not officially part of HTML

I've heard it suggested that we use <label> just like a form:

<ul>
    <label>Fruits I Like:</label>
    <li>Apples</li>
    <li>Bananas</li>
    <li>Oranges</li>
</ul>

but this is a little strange and will not validate anyway.

It's easy to see the semantical problems when trying to style my list headers, where I end up needing to put my <h3> tags within the first <li> and target them for styling with something like:

ul li:first-of-type {
    list-style: none;
    margin-left: -1em;
    /*some other header styles*/
}

horrors! But at least this way I can control the entire <ul>, heading and all, by styling the ul tag.

What is the correct way to do this? Any ideas?

回答1:

As Felipe Alsacreations has already said, the first option is fine.

If you want to ensure that nothing below the list is interpreted as belonging to the heading, that's exactly what the HTML5 sectioning content elements are for. So, for instance you could do

<h2>About Fruits</h2>
<section>
  <h3>Fruits I Like:</h3>
  <ul>
    <li>Apples</li>
    <li>Bananas</li>
    <li>Oranges</li>
  </ul>
</section>
<!-- anything here is part of the "About Fruits" section but does not 
     belong to the "Fruits I Like" section. -->

回答2:

In this case I would use a definition list as so:

<dl>
  <dt>Fruits I like:</dt>
  <dd>Apples</dd>
  <dd>Bananas</dd>
  <dd>Oranges</dd>
</dl>

回答3:

Your first option is the good one. It's the least problematic one and you've already found the correct reasons why you couldn't use the other options.

By the way, your heading IS explicitly associated with the <ul> : it's right before the list! ;)

edit: Steve Faulkner, one of the editors of W3C HTML5 and 5.1 has sketched out a definition of an lt element. That's an unofficial draft that he'll discuss for HTML 5.2, nothing more yet.

回答4:

a <div> is a logical division in your content, semantically this would be my first choice if I wanted to group the heading with the list:

<div class="mydiv">
    <h3>The heading</h3>
    <ul>
       <li>item</li>
       <li>item</li>
       <li>item</li>
    </ul>
</div>

then you can use the following css to style everything together as one unit

.mydiv{}
.mydiv h3{}
.mydiv ul{}
.mydiv ul li{}
etc...

回答5:

You could also use the <figure> element to link a heading to your list like this:

<figure>
    <figcaption>My favorite fruits</figcaption>    
       <ul>
          <li>Banana</li>
          <li>Orange</li>
          <li>Chocolate</li>
       </ul>
</figure>

Source: https://www.w3.org/TR/2017/WD-html53-20171214/single-page.html#the-li-element (Example 162)

回答6:

Try defining a new class, ulheader, in css. p.ulheader ~ ul selects all that immediately follows My Header

p.ulheader ~ ul {
   margin-top:0;
{
p.ulheader {
   margin-bottom;0;
}

回答7:

According to w3.org (note that this link is in the long-expired draft HTML 3.0 spec):

An unordered list typically is a bulleted list of items. HTML 3.0 gives you the ability to customise the bullets, to do without bullets and to wrap list items horizontally or vertically for multicolumn lists.

The opening list tag must be <UL>. It is followed by an optional list header (<LH>caption</LH>) and then by the first list item (<LI>). For example:

<UL>
  <LH>Table Fruit</LH>
  <LI>apples
  <LI>oranges
  <LI>bananas
</UL>

which could be rendered as:

Table Fruit

• apples
• oranges
• bananas

Note: Some legacy documents may include headers or plain text before the first LI element. Implementors of HTML 3.0 user agents are advised to cater for this possibility in order to handle badly formed legacy documents.

回答8:

I put the heading inside the ul. There's no rule that says UL must contain only LI elements.