React Shared State

Very simple shared store for your react app.

0.1.x => 0.2.x migration guide

Important! 0.2 has changed connect's behavior.

1. mapStateToProps now accepts store instead of store.state as first argument
2. connect no longer passes store by it's name to a component
3. Preferable way to use connect is YourProvider.connect instead of building custom function
4. Changed Typescript's generics order from TOuterProps, TInnerProps to TInnerProps, TOuterProps (recompose format)

Usage

Extending State (WebpackBin)

import React, { Component } from "react";
import ReactDOM from "react-dom";
import { createProvider, SharedStore } from "react-shared-state";

class GithubIssuesStore extends SharedStore {
  state = {
    loading: false,
    issuesCount: 0
  };

  loadCountFromGithub = () => {
    this.setState({ loading: true });

    fetch("https://api.github.com/repos/vmg/redcarpet/issues?state=closed")
      .then(resp => resp.json())
      .then(data => {
        this.setState({
          issuesCount: data.length,
          loading: false
        });
      });
  };

  resetCount = () => this.setState({ issuesCount: 0 });
  incrementCount = () => this.setState({ issuesCount: this.state.issuesCount += 1 });
}

const GithubProvider = createProvider("github", GithubIssuesStore);

@GithubProvider.connect((store, props) => ({
  issuesCount: store.state.issuesCount,
  loading: store.state.loading
}))
class IssuesCount extends React.Component {
  render = () => {
    const { issuesCount, loading } = this.props;
    return <h1>Issues count: {loading ? "..." : issuesCount}</h1>;
  };
}

// We can use compose as a HOC call
const ControlButtonsComponent = props => (
  <div>
    <button onClick={() => props.loadCountFromGithub()}>
      Load From GitHub
    </button>
    <button onClick={() => props.resetCount()}>Reset</button>
    <button onClick={() => props.incrementCount()}>Increment</button>
  </div>
);
const ControlButtons = GithubProvider.connect(store => ({
  loadCountFromGithub: store.loadCountFromGithub,
  resetCount: store.resetCount,
  incrementCount: store.incrementCount
}))(ControlButtonsComponent);

export class App extends Component {
  render() {
    return (
      <div>
        <GithubProvider initialState={{ issuesCount: 0 }}>
          <IssuesCount />
          <ControlButtons />
        </GithubProvider>
      </div>
    );
  }
}
ReactDOM.render(<App />, document.getElementById("root"));

Logging

You can add logging for all stores

import { ProviderComponent} from 'react-shared-state'

ProviderComponent.DEBUG = true

or individually

<SimpleProvider ... debug={true}>
   ...
</SimpleProvider>