IMPORTANT NOTE See below
My experiment in web-based teletext emulators. NETV (Non-Editing Teletext Viewer, pronounced Net-VEE) is designed to read in a 7-bit teletext page in the tti format and output it as an html page. I got the original html from "https://al.zerostem.io/~al/teletext/" I originally intended NETV to act as the back-end for some front-end controller page, but I never got round to making that bit. Maybe sombody here can? At the moment, NETV has support for pretty much all colours, contiguous graphics (not seperated, though it wouldn't be hard to add) and double height. However, more than one control code in succession is complicated because of the way the html works, and I haven't implemented this yet. If such a 'group' of codes appears in a page, the rest of the line is ignored and replaced with 'group'. I should have fixed this, but I haven't bothered because... reasons. The script is designed to be called on a web server. The page number and subpage number go in the URL.
As of 15/01/2019, I will no longer be working on Netv. It was a fun experiment, but ended up being too complicated for me to get to work properly. As a result, I have abandoned it in favour of viewer-tf, for which I have written some code to use it with .tti. It works a lot better and has better interactivity, etc. You're welcome to fiddle around with this code, but I won't be fixing any more issues.