This is a meta issue for the work that needs to happen to adopt to an automated, formalized code style for MDN content. This overall approach was proposed in https://github.com/mdn/content/discussions/9901#discussioncomment-1576438 and wasn't objected to, so this is how we're doing it.

MDN has several guidelines for code style. See Code example guidelines. Instead of asking people to know and carry out a style, we ought to do the modern thing: directly format what we want.

Distinct slices of work are broken down in the following issues:

• [Prettier] Refer readers to Prettier style in the JavaScript guidelines #10403 - Refer readers to Prettier style in the guidelines and advise readers that we'll reject any style-only PRs
• [Prettier] Enforce Prettier in CI #10411 (blocked by descendants)
  • [Prettier] Create automation for reviewers to apply code format to PRs #10406
    • [Prettier] Add an initial Prettier config to the repo #10405