Using the HTML 'label' tag with radio butt

问题:

Does the label tag work with radio buttons? If so, how do you use it? I have a form that displays like this:

First Name: (text field)
Hair Color: (color drop-down)
Description: (text area)
Salutation: (radio buttons for Mr., Mrs., Miss)

I'd like to use the label tag for each label in the left column to define its connection to the appropriate control in the right column. But If I use a radio button, the spec seems to indicate that suddenly the actual "Salutation" label for the form control no longer belongs in the label tag, but rather the options "Mr., Mrs., etc." go in the label tag.

I've always been a fan of accessibility and the semantic web, but this design doesn't make sense to me. The label tag explicitly declares labels. The option tag selection options. How do you declare a label on the actual label for a set of radio buttons?

UPDATE: Here is an example with code:

<tr><th><label for"sc">Status:</label></th>
    <td>&#160;</td>
    <td><select name="statusCode" id="sc">
            <option value="ON_TIME">On Time</option>
            <option value="LATE">Late</option>
        </select></td></tr>

This works great. But unlike other form controls, radio buttons have a separate field for each value:

<tr><th align="right"><label for="???">Activity:</label></th>
    <td>&#160;</td>
    <td align="left"><input type="radio" name="es" value="" id="es0" /> Active &#160;
        <input type="radio" name="es" value="ON_TIME" checked="checked" id="es1" /> Completed on Time &#160;
        <input type="radio" name="es" value="LATE" id="es2" /> Completed Late &#160;
        <input type="radio" name="es" value="CANCELED" id="es3" /> Canceled</td>
</tr>

What to do?

回答1:

Does the label tag work with radio buttons?

Yes

If so, how do you use it?

Same way as for any other form control.

You either give it a for attribute that matches the id of the control, or you put the control inside the label element.

I'd like to use the label tag for each label in the left column

A label is for a control, not a set of controls.

If you want to caption a set of controls, use a <fieldset> with a <legend> (and give a <label> to each control in the set).

<fieldset>
  <legend> Salutation </legend>
  <label> <input type="radio" name="salutation" value="Mr."> Mr. </label>
  <label> <input type="radio" name="salutation" value="Mrs."> Mrs. </label>
  <!-- etc -->
</fieldset>

回答2:

Ah yes. Here’s how it works.

<label> labels individual fields, hence each <input type="radio"> gets its own <label>.

To label a group of fields (e.g. several radio buttons that share the same name), you use a <fieldset> tag with a <legend> element.

<fieldset>
    <legend>Salutation</legend>

    <label for="salutation_mr">Mr <input id="salutation_mr" name="salutation" type="radio" value="mr"><label>

    <label for="salutation_mrs">Mrs <input id="salutation_mrs" name="salutation" type="radio" value="mrs"><label>

    <label for="salutation_miss">Miss <input id="salutation_miss" name="salutation" type="radio" value="miss"><label>

    <label for="salutation_ms">Ms <input id="salutation_miss" name="salutation" type="radio" value="ms"><label>
</fieldset>

回答3:

You can't declare a label for a set of buttons, but for each button. In this case, the labels are "Mr.", "Mrs." and "Miss", not "Salutation".

UPDATE
Maybe you should just use another tag for this "label" of yours - since it's not really a label.

<tr>
    <th align="right" scope="row"><span class="label">Activity:</span></th>
    <td>&#160;</td>
    <td align="left"><label><input type="radio" name="es" value="" id="es0" /> Active &#160;</label>
    [... and so on]
</tr>

回答4:

To answer your question: no, you can't connect Salutation to one of the radio buttons. It wouldn't make sense that if you'd click on Salutation, one of the options would be selected. Instead, you can give Mr, Mrs and Miss their own labels, so if someone clicks on one of those words, the corresponding radio button will be selected.

<input id="salutation_mr" type="radio" value="mr" name="salutation">
<label for="salutation_mr">Mr.</label>
<input id="salutation_mrs" type="radio" value="mrs" name="salutation">
<label for="salutation_mrs">Mrs.</label>
<input id="salutation_miss" type="radio" value="miss" name="salutation">
<label for="salutation_miss">Miss</label>

I do think that you could still wrap Salutation inside a <label> element, you just can't use the for attribute. I stand corrected, see the comments below. Although it's technically possible, it's not what <label> was meant for.

回答5:

You can use the aria-role="radiogroup" to associate the controls without using a <fieldset>. This is one of the techniques suggested by WCAG 2.0.

<div role="radiogroup" aria-labelledby="profession_label" aria-describedby="profession_help">
  <p id="profession_label">What is your profession?</p>
  <p id="profession_help">If dual-classed, selected your highest leveled class</p>
  <label><input name="profession" type="radio" value="fighter"> Fighter</label>
  <label><input name="profession" type="radio" value="mage"> Mage</label>
  <label><input name="profession" type="radio" value="cleric"> Cleric</label>
  <label><input name="profession" type="radio" value="theif"> Thief</label>
</div>

However, I noticed that using this technique the WebAim Wave tool to give a warning about a missing <fieldset>, so I'm not sure what AT support for this is like.

回答6:

my 2 cents to the topic, or rather a side node (it does not use implicit association to be able to be placed anywhere, but linking): grouping is done by the name attribute, and linking by the id attribute:

<ol>
    <li>
        <input type="radio" name="faqList" id="faqListItem1" checked />
        <div>
            <label for="faqListItem1">i 1</label>
        </div>
    </li>
    <li>
        <input type="radio" name="faqList" id="faqListItem2" />
        <div>
            <label for="faqListItem2">i 2</label>
        </div>
    </li>
    <li>
        <input type="radio" name="faqList" id="faqListItem3" />
        <div>
            <label for="faqListItem3">i 3</label>
        </div>
    </li>
</ol>

回答7:

The Label's 'for' attribute corresponds to the Radio buttons ID. So...

<label for="thisRad">Radio Button 1</label>
<input type="radio" id="thisRad" />

Hope it helps.

You'd want yours to look something like this...

Salutation<br />
<label for="radMr">Mr.</label><input type="radio" id="radMr" />
<label for="radMrs">Mrs.</label><input type="radio" id="radMrs" />
<label for="radMiss">Miss.</label><input type="radio" id="radMiss" />