End-of-line comment inside object literal moved to next line

Prettier 1.19.1 Playground link

--parser babel

Input:

const x = {
  c: { // Very important key.
      a: 123
  }
};

Output:

const x = {
  c: {
    // Very important key.
    a: 123
  }
};

Expected behavior:

The comment should not be moved down.

Also affects TypeScript.

[thorn0]

It’s not impossible, just very questionable.

[bhison]

As someone who likes inline comments to concisely annotate the flow of my code, I’m still aware of Prettier’s stance as a somwhat opinionated formatter, this is fine and I see that the majority disagree with this as a good style, which I won’t argue against.

So, shelving the feature suggestion, I would argue that it is a bug to move an end of line comment below the line rather than above it. As @glen-84 mentioned, this is a real problem if you’re dealing with an existing codebase and is cause for potentially lots of manual labour in order to not leave your comments as actively misleading.