CODEWITHSUNDEEP
reactjstypescriptreduxreact-redux
dliebeskind
dliebeskind

Reputation: 101

Typescript & Redux connect

I'm trying to connect redux to a component using Typescript and keep running into the same error.

Argument of type 'typeof BaseLayoutUnconnected' is not assignable to parameter of type 'Component < any, {}, any>'. Property 'setState' is missing in type 'typeof BaseLayoutUnconnected'.

import * as React from 'react';
import { IBaseLayoutProps, IBaseLayoutState } from './base-layout.types';
import { ChatContainer } from '../../components';
import { connect, DispatchProp } from 'react-redux';
import { bindActionCreators, Dispatch } from 'redux';
import { RouteComponentProps } from 'react-router';
import { ChatActions } from 'app/actions';
import { RootState } from 'app/reducers';
import { omit } from 'app/utils';

export const mapStateToProps = (state: RootState, ownProps) => {
    return {
        chatItems: state.chatItems
    };
};

export const mapDispatchToProps = (dispatch: Dispatch) => ({
    actions: bindActionCreators(omit(ChatActions, 'Type'), dispatch)
});

export class BaseLayoutUnconnected extends React.Component<IBaseLayoutProps, IBaseLayoutState> {
   constructor(props) {
        super(props);
        this.state = {};
    }

    render() {
        const { actions, chatItems } = this.props;
        return <ChatContainer actions={actions} chatItems={chatItems} />;
    }
}

export const BaseLayout = connect(
    mapStateToProps,
    mapDispatchToProps
)(BaseLayoutUnconnected);

This is being called in my app.tsx via

 <Route exact={true} path="/" component={BaseLayout} />

Here are the props and state

export interface IBaseLayoutProps {
    chatItems: RootState.ChatState;
    actions: ChatActions;
}

export interface IBaseLayoutState {}

ChatActions looks like

import { createAction } from 'redux-actions';
import { ChatItemModel } from 'app/models';

export namespace ChatActions {
    export enum Type {
        ADD_CHAT_ITEM = 'ADD_CHAT_ITEM'
    }

    export const addChatItem = createAction<PartialPick<ChatItemModel, 'text'>>(Type.ADD_CHAT_ITEM);
}

export type ChatActions = Omit<typeof ChatActions, 'Type'>;

Upvotes: 2

Views: 5891

Answers (1)

Sven Liebig
Sven Liebig

Reputation: 838

That's a problem i had too when i first started with Redux and TypeScript. There is a tricky solution. The connect methode takes alot of generics. I try to explain it with your example.

First of all you have to split the properties of your BaseLayoutUnconnected.

export interface IBaseLayoutStateProps {
    chatItems: RootState.ChatState;
}

export interface IBaseLayoutDispatchProps {
    actions: ChatActions;
}

export interface IBaseLayoutOwnProps {
    // put properties here you want to make available from the connected component
}

export type IBaseLayoutProps = IBaseLayoutOwnProps & IBaseLayoutDispatchProps & IBaseLayoutStateProps 

export interface IBaseLayoutState {}

Then you have to fill the generics of the different redux functions.

const mapStateToProps: MapStateToProps<IBaseLayoutStateProps, {}, RootState> = (state: RootState): IBaseLayoutStateProps => ({
    chatItems: state.chatItems
})

export const mapDispatchToProps: MapDispatchToPropsFunction<IBaseLayoutDispatchProps, IBaseLayoutOwnProps> = (dispatch: Dispatch, ownProps: IBaseLayoutDispatchProps): IBaseLayoutDispatchProps => ({
    actions: bindActionCreators(omit(ChatActions, 'Type'), dispatch)
});

export default connect<IBaseLayoutStateProps , IBaseLayoutDispatchProps, IBaseLayoutOwnProps , RootState>(
    mapStateToProps,
    mapDispatchToProps
)(BaseLayoutUnconnected as any)

a good source, where you can find all this stuff i wrote and more is this repository

Upvotes: 6

Related Questions