Question

我想在此菜单中创建OR条件：

<li class="#{facesContext.viewRoot.viewId == ('/company/team.xhtml' or '/company/partnerships.xhtml' ) ? 'active' : '' }"><a class="item" href="company/company.xhtml">Company</a>
    <ul>
        <li><a href="company/team.xhtml">Team</a></li>
        <li><a href="company/partnerships.xhtml">Partnerships</a></li>
    </ul>
</li>

如果用户选择了team.xthml或partnerships.xhtml页面，则会在<li>标记中设置“有效”值。

Answer 1

这是正确的语法：

<li class="#{facesContext.viewRoot.viewId == '/company/team.xhtml' or facesContext.viewRoot.viewId == '/company/partnerships.xhtml' ? 'active' : '' }">

为了缩短一点，您可以使用#{view}代替#{facesContext.viewRoot}：

<li class="#{view.viewId == '/company/team.xhtml' or view.viewId == '/company/partnerships.xhtml' ? 'active' : '' }">

为了缩短它，您可以使用<c:set>将#{view.viewId}设为别名：

<c:set var="viewId" value="#{view.viewId}" scope="request" />
...
<li class="#{viewId == '/company/team.xhtml' or viewId == '/company/partnerships.xhtml' ? 'active' : '' }">

EL表达式中的OR条件如何？

1 个答案: