How to listen the Alert box of WebPage clicked in Chrome extension

Question

I am now developing a Chrome extension that can record the webpage's alert or confirm box clicked. What I want is when the alert box was clicked, the extension can capture the event.

I can not find related document about it, so turn here for help.

Answer 1

There are two methods:

1. override those functions inside a page context script
2. use chrome.debugger API with Page.javascriptDialogClosed event listener