The missing content

This is definitely a well structured and friendly project, however, contents like "web worker", "canvas api", "message channel", etc are missing (or i missed). Is there a plan for additional articles in order to make this project even better ?
if so, I'd like to contribute to "web worker"(or other) section.

Start by reviewing the existing tutorial contents and the issue's proposed topics: web workers, the Canvas API, and message channels. The scope and target article are not decided; done would require an agreed topic and a completed article integrated into the tutorial.

Written by the indexing model from the issue text.