Window.onbeforeunload not setting after page refresh
Question
I'm making an error reporter that captures errors, then just before the user refreshes/closes, it will send the errors to the server to be put in a log file. I have a window.onerror function that captures the errors and stores it in an array. Inside the window.onerror function, I also set window.onbeforeunload, which will send ask for the.network request data from the service worker (which keeps a record of the.network logs from that page load). When ctrl-f3 (on chromebook, equivalent to ctrl-f5 on windows), then try to reload it will ask confirmation to refresh the page. If I do, then try to refresh it again it won't show the popup. I did some debugging to see that window.onbeforeunload at that time is not there. In fact, the part of my code (posted below), doesn't execute! I put the error-reporting script as an external file and load it in the <head> tag of my HTML page. It is wrapped around an anonymous function, with no onload listener. Why isn't this working? I can't wrap my head around the solution, so I would gladly accept help. Thanks.
Oh, almost forgot: Here's my code (shortened to the points that are relevant to the question):
window.onerror = function(eventOrMessage, url, lineNumber, colNumber, error){
window.onbeforeunload = function(){
const channel = new BroadcastChannel("net-log");
channel.postMessage({requestLog:true});
channel.addEventListener("message",function(event){
if(event.data.encodedLogEntries){
console.log(event.data.encodedLogEntries);
}
});
return "Sending messages";
};
//works the first time, then doesn't set. Actually, the second time it doesn't execute this at all!
console.log(window.onbeforeunload);
}
1 answers
solution1
0 ACCPTED 2020-12-23 15:15:40
I found out the problem, it was an error in my service worker for some reason causing the dilemma.
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