On Tue, Jan 21, 2020 at 12:25 PM James H. H. Lampert <
jamesl@xxxxxxxxxxxxxxxxx> wrote:

So far, not just looking at emulation, but also at general JavaScript
code for processing function keys, Mr. Liisberg's product is the only
thing I've seen that can keep Chrome from throwing up (and my choice of
phrase is intentional) the Developer Tools sidebar when I hit F12
(certainly an important function key in a 5250 emulator).

You might want to inquire on the Web list. With JavaScript you register
event handlers (functions) that are invoked when keypress events occur.
Then within an event handler you can invoke stopPropagation() and
cancelBubble() methods, which prevent the browser's default behavior from
occurring when keys like F12 are pressed.



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