wai-aria - ARIA - 您是否需要将 ARIA-EXPANDED 与 ARIA-HIDDEN 一起使用？

Question

我是 ARIA 角色的新手。如果我有工具提示类型功能，即如果有人单击问号按钮，会显示更多文本详细说明如何填写表单字段，我应该使用 aria-expanded 属性、aria-hidden 属性还是两者都使用？

<div class="login-form-field tt-highlight">
    <div class="error-message error-style">
        <p>Sorry you have not entered anything in the field above.</p>
    </div>
    <div class="col-xs-10 col-sm-10 col-md-10"> 
        <label for="inputTxtCustomerPostcode" class="login" />Postcode:</label>
        <input id="inputTxtCustomerPostcode" type="text" />
    </div>
    <div class="col-xs-2 col-sm-2 col-md-2">
        <a title="Please enter a valid case reference tooltip" class="login-tooltip" data-toggle="collapse" data-parent="#accordion" href="#collapseTxtCustomerPostcode" role="button" aria-pressed="false"></a>
    </div>

    <div id="collapseTxtCustomerPostcode" class="panel-collapse collapse" role="tree tooltip">
        <div class="panel-body" role="treeitem" aria-expanded="false" aria-hidden="true">
            <p>some text goes here for the tooltip</p>
        </div>
    </div>
</div>

Answer 1

使用 RDF model帮助图:


aria-expanded为 treeitem 定义角色通过继承。
aria-hidden为所有角色定义，但有以下警告:

Note: Authors are advised to avoid using aria-hidden="false" with styles or attributes that have historically prevented rendering in all modalities, such as display:none or visibility:hidden in CSS, or the hidden attribute in HTML 5. At the time of this writing, aria-hidden="false" is known to work inconsistently when used in conjunction with such features. As future implementations improve, use caution and test thoroughly before relying on this approach.

结果， aria-expanded本身应该就足够了。

引用文献

WAI-ARIA Taxonomy

WAI-ARIA RDF Model

aria-expanded

aria-hidden