TypeScript errors when using Redux-Form with React-Redux connection

Question

I fell in love with TypeScript until I found very discouraging incompatibilities between Redux-Form and React-Redux.

My goal is to decorate the decorated component reduxFormwith the decor-redux decorator connect- this template always worked for me in the Babel configurations and, it seems, after the HOC . Here is an example:

import * as React from 'react';
import { Dispatch } from 'redux';
import { connect } from 'react-redux';
import { reduxForm, Field, InjectedFormProps } from 'redux-form';

interface SampleFormData {
  username: string;
}

interface SampleFormProps {
  saveData: (data: SampleFormData) => void;
}

type AllSampleFormProps = SampleFormProps & InjectedFormProps<SampleFormData>;

const SampleForm: React.SFC<AllSampleFormProps> = (props) => (
  <form onSubmit={props.handleSubmit(props.saveData)}>
    <Field name="username" component="input" />
  </form>
);

const DecoratedSampleForm = reduxForm<SampleFormData>({ form: "sampleForm" })(SampleForm);

export default connect(
  () => ({}),
  (dispatch) => ({
    saveData: (data: SampleFormData) => dispatch({ type: "SAVE_DATA", data })
  })
)(DecoratedSampleForm);

Here TypeScript errors throw:

> Argument of type 'DecoratedComponentClass<SampleFormData,
> Partial<ConfigProps<SampleFormData, {}>>>' is not assignable to
> parameter of type 'ComponentType<{ saveData: (data: SampleFormData) =>
> { type: string; data: SampleFormData; }; }>'.
> 
> Type 'DecoratedComponentClass<SampleFormData,
> Partial<ConfigProps<SampleFormData, {}>>>' is not assignable to type
> 'StatelessComponent<{ saveData: (data: SampleFormData) => { type:
> string; data: SampleFormData; };...'.
> 
> Type 'DecoratedComponentClass<SampleFormData,
> Partial<ConfigProps<SampleFormData, {}>>>' provides no match for the
> signature '(props: { saveData: (data: SampleFormData) => { type:
> string; data: SampleFormData; }; } & { children?: ReactNode; },
> context?: any): ReactElement<any>'.

Has anyone found a solution for make-redux to accept a type DecoratedComponentClass? I found a suggestion for using the "middle" component, but I was not able to get it to work with thunk actions. Plus, I found that this creates more problems than it solves the issue of a set of forms.

Answer 1

, , , , connect TStateProps TDispatchProps.

interface SampleFormData {
  username: string;
}

interface SampleFormProps {
  saveData: (data: SampleFormData) => void;
}

type AllSampleFormProps = SampleFormProps & InjectedFormProps<SampleFormData>;

const SampleForm: React.SFC<AllSampleFormProps> = (props) => (
  <form onSubmit={props.handleSubmit(props.saveData)}>
    <Field name="username" component="input" />
  </form>
);

const DecoratedSampleForm = reduxForm<SampleFormData>({ form: "sampleForm" })(SampleForm);

export default connect<{},{}>(
  () => ({}),
  (dispatch) => ({
    saveData: (data: SampleFormData) => dispatch({ type: "SAVE_DATA", data })
  })
)(DecoratedSampleForm);

, , , , @types.

, , ; , , DecoratedComponentClass.

export default connect<{}, SampleFormProps, InjectedFormProps<SampleFormData>>(
  () => ({}),
  (dispatch) => ({
    saveData: (data: SampleFormData) => dispatch({ type: "SAVE_DATA", data })
  })
)(DecoratedSampleForm);