mobx-undecorate

Update MobX 4/5 code to be conformant to MobX 6.

To run this codemod:

- Go to your source files directory
- Run npx mobx-undecorate

The following MobX 4/5 APIs will be converted to their MobX 6 equivalents:

- @computed
- @action
- @observable
- @observer
- @inject
- decorate

$3

The following flags are accepted:

- --ignoreImports: normally the codemod will only convert decorators if they are imported from a MobX package, using import statements like import {observable} from "mobx". This flag ignores checking for imports statements and converts all @computed, @action, @observable, @observer and @inject calls.
- --keepDecorators: don't rewrite decorators but keep them as they are, and generate the required makeObservable calls. Use this option if you intend to keep using decorators after updating to MobX 6.
- --decoratorsAfterExport: set this flag only if you have decoratorsBeforeExport: false in your Babel configuration, otherwise you will get an error like: SyntaxError: Decorators must be placed before the 'export' keyword. You can set the 'decoratorsBeforeExport' option to false.
- --parseTsAsNonJsx: parse ts file as non-jsx, and other file as same as before. see more details -> mobxjs/mobx#issues2754