您可以使用onclick
属性在调用动作之前执行一些JavaScript代码。
例如为:
<h:commandButton ... onclick="document.body.style.background='pink'">
这可是最好用的<f:ajax>
onevent
属性这一点,这样就可以恢复更改:
<h:commandButton ...>
<f:ajax ... onevent="handleDo" />
</h:commandButton>
<img id="progress" src="progress.gif" class="hidden" />
与例如这里面禁用/启用按钮,显示/隐藏形象进度:
function handleDo(data) {
var status = data.status; // Can be 'begin', 'complete' and 'success'.
var button = data.source; // The HTML element which triggered the ajax.
var image = document.getElementById("progress"); // Ajax loading gif?
switch (status) {
case 'begin': // This is called right before ajax request is been sent.
button.disabled = true;
image.style.display = "block";
break;
case 'complete': // This is called right after ajax response is received.
image.style.display = "none";
break;
case 'success': // This is called when ajax response is successfully processed.
button.disabled = false;
break;
}
}
如果我也想重新呈现按钮本身被禁用一次被点击(+,同时操作方法执行)? – membersound
查看更新的答案。 – BalusC
感谢Balus,这真的很棒。按钮的行为如预期。无论如何,progress.gif随时显示。如何在按钮被按下之前禁用它? – membersound