英文:
Can Tampermonkey force tab to close despite "Changes that you made may not be saved"
问题
在某些条件下，我的用户脚本允许用户通过按钮点击关闭页面，但当我使用 window.close() 时，会出现消息："Leave Site? Changes that you made might not be saved"。
我希望禁止显示此消息并简单关闭页面。
我尝试添加 beforeunload 和 unload 事件处理程序，如下所示：
document.querySelector('#mybutt').addEventListener('click', () => {
window.close();
});
window.addEventListener('beforeunload', (event) => {
console.log('This will suppress the Leave/Cancel prompt');
});
window.addEventListener('unload', (event) => {
console.log('This will suppress the Leave/Cancel prompt');
});
确实，Leave/Cancel提示不再出现，但在控制台中我现在有错误消息 Scripts may close only the windows that were opened by them.
是否有解决方法？
英文:
Under certain conditions my userscript allows users to close the page via button press, but when I issue window.close() I get the message: "Leave Site? Changes that you made might not be saved".
I wish to suppress this message and simply close the page.
I tried adding beforeunload and unload event handlers, as follows:
document.querySelector('#mybutt').addEventListener('click', () => {
window.close();
});
window.addEventListener('beforeunload', (event) => {
console.log('This will suppress the Leave/Cancel prompt');
});
window.addEventListener('unload', (event) => {
console.log('This will suppress the Leave/Cancel prompt');
});
and, sure enough, the Leave/Cancel prompt did not appear - but in the console I now have the error Scripts may close only the windows that were opened by them.
Is there a work-around?
答案1
得分: 1
是的，有的。看起来有点奇怪，但它有效。
假设你有一个触发显示消息并带有关闭页面按钮的代码。在代码的那一部分，你会显示消息，添加：
document.querySelector('#myMsgDiv').style.display = 'block';
location.href = "javascript:(" + function() {
window.onbeforeunload = null;
window.onunload = null;
console.log('load/unload hit');
} + ")()";
出于某种原因，我还必须将相同的代码添加到按钮点击处理程序中：
document.querySelector('#btnCloseWindow').addEventListener('click', () => {
location.href = "javascript:(" + function() {
window.onbeforeunload = null;
window.onunload = null;
console.log('load/unload hit');
} + ")()";
window.close();
});
页面将自动关闭。
参考链接：
https://forums.mozillazine.org/viewtopic.php?f=38&t=2083577
英文:
Yes there is. Looks odd, but it works.
Suppose you have code that triggers a message to displayed with a button to close the page. In that code, at the point where you would display the message, add:
document.querySelector('#myMsgDiv').style.display = 'block';
location.href = "javascript:(" + function() {
window.onbeforeunload = null;
window.onunload = null;
console.log('load/unload hit');
} + ")()";
For whatever reason, I had to also add the same code into the button-click handler:
document.querySelector('#btnCloseWindow').addEventListener('click', () => {
location.href = "javascript:(" + function() {
window.onbeforeunload = null;
window.onunload = null;
console.log('load/unload hit');
} + ")()";
window.close();
});
The page will automatically close.
References:
https://forums.mozillazine.org/viewtopic.php?f=38&t=2083577
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