Javascript event after Print [duplicate] - javascript

This question already has answers here:
How to detect the printed status or canceled status in web browser using javascript?
(1 answer)
Is there a way to track if a user prints a web page?
(8 answers)
Closed 3 years ago.
How the way get feedback from button click cancel and print.
For example, if I click cancel button, show 0, if click print show 1.

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How to access the webpage DOM/HTML from an extension popup or background script?
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How to determine which html page element has focus? [duplicate]
(5 answers)
Closed last month.
From the browser extension (running in the background) I would like to detect that user placed the mouse pointer in the password input box and trigger some event(s) e.g. pop-up an icon to prompt the user for action (autofill the box with the password, provide some options, etc) similarly as eg. 1password does in the screen capture below.
How this can be accomplished e.g. in JavaScript?

How to prevent the user from leaving my page [duplicate]

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Prevent a webpage from navigating away using JavaScript
(10 answers)
Prevent user to leave my page in javascript
(2 answers)
Closed 4 years ago.
I'm trying to make an online test using spring-mvc and html, css, jquery and I want to prevent the user that is doing the test from leave the test screen while doing the test. Does anybody know how I can do that?

browser reload and close issue idea [duplicate]

This question already has answers here:
Identifying Between Refresh And Close Browser Actions
(13 answers)
How can I detect browser tab refresh or close using javascript [duplicate]
(3 answers)
Closed 7 years ago.
How can I distinguish browser close and reload/refresh/f5 though jQuery/JS? I want to update database (via ajax) when close browser/tab and keep all as it is when reload.
What I am doing now is same action running when reload or close. But after reload again run a restore function (via ajax) to set back in previous state.
Tried How can I detect browser tab refresh or close using javascript not worked. Any Idea? cron job is not real time. I need real time action
Professionals help please how you handle this issue.

Automatiaclly crop website before printing the page [duplicate]

This question already has answers here:
remove url and print text from the printed page
(4 answers)
Closed 7 years ago.
I have a HTML file that triggers print() when you click a button. How do you crop the page so the site name and url does not show up?
You cant, including URL and/or title is up to the browsers print dialog.

Force page to refresh/reload if user clicks on back button in browser [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Cross-browser onload event and the Back button
How can I force a view/page to refresh when a user clicks browser back to that page?
use onunload
<body onunload="alert(unloading page')"></body>

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