Progmem variable

Hi there!

I am using nodemcu with esp2866 for light control. I have stored html code in flash memory using progmem. I need to read a value of variable in html code to present it on the web pages. My question is how I declare a variable in flash memory in html code so i can read value from SRAM?

Thanks for any advice, I am really stuck on this. :(

https://tttapa.github.io/ESP8266/Chap01%20-%20ESP8266.html

Page 34+ explains how to store (compressed) web pages in ESP8266's SPIFFS memory. Leo..