Determine the 'Overtype' mode using Javascript

Question

We are creating a web app to replace an old-school green-screen application. In the green-screen app, as the user presses the Insert key to switch between overtype and insert mo

Answer 1

The problem is that if the user presses the insert key after entering your page then you can track down it easily.

But when the user has already pressed the insert key before entering your page then it seems to be a difficult task.