CODEWITHSUNDEEP
reactjsflowtype
deepak
deepak

Reputation: 8090

How to see the flowtype for a specific version of React

The React flow definitions seem to change between versions

eg. for React version 15.6.1, PureComponent has the definition

declare class React$PureComponent<DefaultProps, Props, State> extends React$Component<DefaultProps, Props, State> {
  // TODO: Due to bugs in Flow's handling of React.createClass, some fields
  // already declared in the base class need to be redeclared below. Ideally
  // they should simply be inherited.

  static defaultProps: $Abstract<DefaultProps>;
  props: Props;
  state: $Abstract<State>;
}

but the current definition is 

declare class React$PureComponent<Props, State = void>
  extends React$Component<Props, State> {
  // TODO: Due to bugs in Flow's handling of React.createClass, some fields
  // already declared in the base class need to be redeclared below. Ideally
  // they should simply be inherited.

  props: Props;
  state: State;
}

the change was in https://github.com/facebook/flow/releases/tag/v0.53.0

The question is how to get the flow definations for my version of React

flow-typed install [email protected]

does not work as well

another question is, my package.json has a dependency on flow-bin so where are these changes coming from ?

Upvotes: 0

Views: 325

Answers (1)

Adam
Adam

Reputation: 2287

The flow version is not specifically tied to a React version. The changes to the type of Component and PureComponent are improvements in the way Flow types them in Flow v0.53, regardless of what version of React you use.

If you want the old types, any React and Flow < 0.53 will work. If you want the new version, any React and Flow >= 0.53 will work.

There's a rundown of why this was changed and what you need to do in your code in this blog post on Flow 0.53: https://medium.com/flow-type/even-better-support-for-react-in-flow-25b0a3485627

Upvotes: 1

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