Feature candidate.

[HillLiu]

private-property-in-object

• https://babeljs.io/docs/en/babel-plugin-proposal-private-property-in-object
• @babel/plugin-proposal-private-property-in-object

[HillLiu]

Done

hasOwn

https://github.com/niksy/babel-plugin-transform-object-hasown#readme
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/hasOwn

It can also be used to test objects created using [Object.create(null)](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects /Object/create).

[HillLiu]

Done

nullish assignment

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_nullish_assignment
• https://babeljs.io/docs/en/babel-plugin-proposal-logical-assignment-operators