如何在JSF< h：commandLink>之前执行Javascript？行动是什么？ [英] How can I execute Javascript before a JSF <h:commandLink> action is performed?

问题描述

如果你有一个JSF < h：commandLink> （它使用 onclick 一个<$的事件c $ c>< a> 提交当前表单），如何在执行操作之前执行JavaScript（例如请求删除确认）？

If you have a JSF <h:commandLink> (which uses the onclick event of an <a> to submit the current form), how do you execute JavaScript (such as asking for delete confirmation) prior to the action being performed?

推荐答案

<h:commandLink id="myCommandLink" action="#{myPageCode.doDelete}">
    <h:outputText value="#{msgs.deleteText}" />
</h:commandLink>
<script type="text/javascript">
if (document.getElementById) {
    var commandLink = document.getElementById('<c:out value="${myPageCode.myCommandLinkClientId}" />');
    if (commandLink && commandLink.onclick) {
        var commandLinkOnclick = commandLink.onclick;
        commandLink.onclick = function() {
            var result = confirm('Do you really want to <c:out value="${msgs.deleteText}" />?');
            if (result) {
                return commandLinkOnclick();
            }
            return false;
        }
    }
}
</script>

其他Javascript操作（如验证表单输入等）可以通过将调用替换为<$ c来执行$ c> confirm（）调用另一个函数。

Other Javascript actions (like validating form input etc) could be performed by replacing the call to confirm() with a call to another function.

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