Javascript 就在卸载事件之前的 iframe
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iframe just before unload event
提问by Max
I need to capture an event which should be triggered just before the content of the iframe disappears.
我需要捕获一个应该在 iframe 的内容消失之前触发的事件。
I have been trying to accomplish something like this
我一直在努力完成这样的事情
$iframe = $('iframe');
$iframe.beforeunload(function () {
debugger;
});
OR
或者
$iframe = $('iframe');
$iframe.unload(function () {
debugger;
});
I have even tried binding it to the iframe window itself without any luck
我什至尝试将它绑定到 iframe 窗口本身而没有任何运气
$iframe = $('iframe');
$iframe[0].contentWindow.onunload = function () {
debugger;
};
None of these eventhandlers actually trigger for me
这些事件处理程序实际上都没有为我触发
and I am quite confused why. To reload the iframe I use .reload()from outside the iframe and from within, maybe I need to use a different method?
我很困惑为什么。要从 iframe.reload()外部和内部重新加载我使用的 iframe，也许我需要使用不同的方法？
回答by Max
Figured it out! I didn't know the contentWindowlooses its reference after a reload.
弄清楚了！我不知道contentWindow重新加载后会丢失其参考。
$iframe.load(function () {
$iframe[0].contentWindow.onbeforeunload = function () {
debugger;
};
});
