我该如何重写html元素的onkeydown？ [英] How can I rewrite onkeydown on the html element?
问题描述
我继承了一个应用程序，它在窗口弹出窗口中实现了禁用F5。
< body onkeydown =disableF5（）; >
然而，如果用户在窗口下方点击正文并按下F5，页面仍会刷新。 / p>
我将函数调用移动到
< html onkeydown = disableF5（）;>
现在F5被禁用，一切都按预期工作。
然而，这并不是获得代码的最佳地方，如果我可以在< script> 部分中做下面的事情，我更喜欢它，所以我可以添加注释，也可以将其移至外部文件。
$（html）。attr（onkeydown， disableF5（）;）;
这段jQuery没有按预期工作，所以我现在一直在坚持。 / p>
有没有一种方法可以设置< html> 元素的属性？
编辑：我想我会在这里抛出我的disableF5（）函数。
function disableF5（）{
if（window.event&& window.event.keyCode == 116）{
window.event.cancelBubble = true;
window.event.returnValue = false;
window.event.keyCode = 0;
window.status =所有弹出窗口都禁用F5;
返回false;
$ / code $ / pre
解决方案 <$ p $ （'keydown'，function（）{disableF5（）;}）;} $（'html'）。
请参阅 $ .bind（）的文档
编辑 - 中等详细解释：
HTML onstuff 属性在加载DOM时评估。在事后添加它们没有任何作用。因此，必须使用正确的JS事件绑定。
I inherited an application that implements disabling F5 in a window popup.
<body onkeydown="disableF5();">
However if the user clicks below the body in the window and presses F5 the page will still refresh.
I moved the function call to
<html onkeydown="disableF5();">
and now F5 is disabled and everything is working as expected.
However this is not the best place to have code and I would prefer it if I could do something like below in my <script> section so I can add comments and perhaps move it to an external file.
$("html").attr("onkeydown", "disableF5();");
This snippet of jQuery does not work as expected however so I'm currently stuck at the moment.
Is there a way I can set the attributes of the <html> element?
Edit: I thought I would throw my disableF5() function in here.
function disableF5() {
if (window.event && window.event.keyCode == 116) {
window.event.cancelBubble = true;
window.event.returnValue = false;
window.event.keyCode = 0;
window.status = "F5 is disabled on all popups";
return false;
}
}
$('html').bind('keydown', function(){ disableF5(); });
See the documentation for $.bind()
Edit – Moderately verbose explanation:
HTML onstuff attributes are evaluated as the DOM is loaded. Adding them post-factum doesn't have any effect. Thus, proper JS event binding must be used.
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