react-context-store-global

react-context-store-global

The EASIEST to integrate, global state management library for React based on Context API

Installation

npm install react-context-store-global

How To Setup:

Create a file to maintain the global state. For eg:

  export  const globalState = {
      state : {
              "id" : "0",
              "name" : "sample"
               }
        }

Do the following steps in the entry file. (Index.js if the app is created by create-react-app)

• Import the package

  import {ContextStoreProvider} from 'react-context-store-global'; 
  

• Import the global state .Create an instance by passing initial global state.

  import {globalState} from './globalState';
  new ContextStoreProvider(globalState.state);
  

• Wrap the component as follows;

  ReactDOM.render( <ContextStoreProvider><App/> </ContextStoreProvider>, document.getElementById('root'));
  

API:

• ContextStore.getContextStoreData(this) To get the current global state.Can be used in stateful component only. this refer the class instance.
• ContextStore.getContextStoreDataItem('id') To get a particular state value based on key.Only first level Keys should be passed.
• ContextStore.updateContextStore(instance,key,payload) To update the global state. Payload will be updated against the key.this refer the class instance.Only first level keys should be passed.Can be used only in stateful component.
• ContextStore.useContextStore(Class) For a stateful component,this is how component subscribe to the context object. This is necessary to access or update the global state. Class refer to the class name.

How to access or update the global state from components ? See the examples below.

-- Examples below are very stright forward, simple to grasp and self explnatory.Necessary comments are added in the snippets itself--

From a stateful component

import React from 'react';
import {ContextStore} from 'react-context-store-global';
class MyComp extends React.Component {

 handleInput =(event)=>{
  //Update the global state with the user input.
   ContextStore.updateContextStore(this,'id',event.target.value)
 }
 render(){
 // Get id from global state. Three different ways of doing it below.
     const {id} = this.context;  
  //OR const id   = ContextStore.getContextStoreDataItem('id');
  //OR const {id} = ContextStore.getContextStoreData(this);
  return(
   
       <div> 
         {id}
         <input type="text" onChange={this.handleInput} />
       </div>
     
  )
 }
 
}
ContextStore.useContextStore(MyComp);
export default MyComp;

From stateless component

import React from 'react';
import {ContextStore,useContext} from 'react-context-store-global';
const MyComp = (props) => {
//Get id from the global state.
const {id} = useContext(ContextStore);
const {updateStore} = useContext(ContextStore);
 const handleChange =(event)=>{
    //Update the global state with the user input
   updateStore("id",event.target.value);
  }
  return (
      <div>
      <input type="text" onChange={handleChange} />
      </div>
  );
}
export default MyComp;