[feat] prefer shorthand properties

[loynoir]

Prettier 2.6.2
Playground link

# Options (if any):

Input:

import { xyz as xyz } from 'xyz'
var o = { a: a, b: b, c: c };
export { foo as foo }

Output:

import { xyz as xyz } from 'xyz'
var o = { a: a, b: b, c: c };
export { foo as foo }

Expected behavior:

import { xyz } from 'xyz'
var o = { a, b, c };
export { foo }

Situation

Given

• { X }

When

• <F2> twice to rename reference

Becomes

• { Y: Y } or { Y as Y }.

Why

Would be nice if prettier can make them shorthand again, as short-handify after rename-reference is not part of language server protocol.

Related Doc

https://babeljs.io/docs/en/babel-plugin-transform-shorthand-properties

[thorn0]

Prettier generally doesn't do things like this. See https://prettier.io/docs/en/rationale.html#what-prettier-is-_not_-concerned-about
I'd recommend using ESLint. See https://eslint.org/docs/latest/rules/object-shorthand