Can I make web interface for hardware events?

Hello everyone...
I am new to this forum, I hope I can add more value here.

I have a question regarding a project I am working on.
I am developing a remote controller using an ESP8266 and interfacing with some simple electronics to my hardware I want to control. I want to interface with the user using a webpage obviously.
In the beginning I started to do the development using the esplorer tool and lua scripting. But that was very not helpful and can't give me all the features I wanted. Then I found this amazing javascript interpreter that may give me what I need. So I have some questions for you guys.

I want to control a wall-mounted device that controls my AC. The device has some interfacing buttons (power, fan, tempUp and tempDown).
I want to make the device controlled by the web interface as well as the device interface itself.
developing the webpage is easy and I could follow the tutorials easily. But is it possible to update the content of the web interface when a button is clicked? I mean if someone turned on the AC, when I go to the webpage I can see the status as "ON" and if someone changed the temperature I can keep track of how many times he clicked the button and update the temp variable in the controller?

To sum up, I want to make the variables for the webpage controlled by the hardware as well as the user from the PC.

BTW I made all the interfacing hardware and I just need to program my 8266.

Thanks

P.S. I don't need to update the page while it is still open..

...check this parallel conversation..., that's where the Keypad stuff keeps coming... (btw, you can edit posted entries).

'Final', 'moduled' Keypad code is discussed (and available) in Keypad - bought or DIY - controlled directly by Espruino conversation.

Looks like the other thread has got all the posts in it. Shall I just kill this one?

I think 'Interfacing' is ok for what you're asking,