Is there a code editor for the web that works on mobile?

Question

JavaScript

I need a simple web editor (i.e. embedded in a web page) that supports the following features:

• monospace font for all text by default;
  
• interception of pressing Tab;
  
• insert on Tab 4 spaces;
  
• highlighting non-printing characters (spaces, tabs and line breaks);
  
• display of line numbers;
  
• auto-completion (based on a custom function);
  
• work both on desktop and mobile browsers (support for Firefox for Android is especially important).
  

For everything else except the last one, the Ace and CodeMirror editors are perfect . Ace simply does not support mobile platforms, while CodeMirror does, but with some glitches, and is simply too heavy for them.
I would like something quite simple - in fact, I do not need a full-fledged code editor with highlighting.
In principle, writing a similar editor (with the listed features) is not so difficult on your own, but it is possible that one has already been written. I don't want to reinvent the wheel.

Answer 1

c9.io