You can use this custom bundle.
https://github.com/elixir-lang/elixir-tmbundle
How to add custom bundles to Textastic:
https://www.textasticapp.com/v6/manual/lessons/How_can_I_add_my_own_syntax_definitions__themes_and_templates.html
Customer support service by UserEcho
Ideas
You can use this custom bundle.
https://github.com/elixir-lang/elixir-tmbundle
How to add custom bundles to Textastic:
https://www.textasticapp.com/v6/manual/lessons/How_can_I_add_my_own_syntax_definitions__themes_and_templates.html