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このWCAG 2.2 テクニック集の日本語訳は作業中となっています。WCAG 2.1 達成方法集の日本語訳をご利用いただけます。
[ WCAG 2.1 達成方法集 ]

Technique H36:Using alt attributes on images used as submit buttons

About this Technique

This technique relates to 1.1.1: Non-text Content (Sufficient).

This technique applies to content using image-based submit buttons.

Description

For input elements of type image, the alt attribute of the input element is used to provide a functional label. This label indicates the button's function, but does not attempt to describe the image. The label is especially important if there are multiple submit buttons on the page that each lead to different results.

Examples

Example 1: An input element with an alt attribute

<form action="/find" method="post" role="search">
  <label for="look-up">Find books<label>
  <input id="look-up" type="text">
  <input alt="Search" src="button.gif" type="image">
</form>

Related Resources

No endorsement implied.

Tests

Procedure

  1. For all input elements that have a type attribute value of image, check for the presence of an alt attribute.
  2. Check that the value of the alt attribute describes the button's function.

Expected Results

  • #1 and #2 are true
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