easy-create-react-context

The tool just encapsulated React.createContext, but it's

more efficient,

more convenient when compared to Reducer + Context such a combination and

easier to manage the state of small modules. You can think of it as mini version of MobX, but with the same rendering efficiency.

You can also think of it as my personal black-tech small tool. Hope you enjoy it.

DEMO

Installation

• YARN

   yarn add easy-create-react-context

• NPM

   npm i easy-create-react-context

Quick Start

• Create context by invoking getConTexts, Use Provider to set contexts and value.
• Call updateAsync of contexts that we declared to run some asynchronous functions.

import { getConTexts, Provider } from 'easy-create-react-context';

type TExample = InstanceType<typeof Example>;

const contexts = getConTexts<TExample>();

class Example {
  a = 1;
  b(num: number) {
    this.a += num;
  }
  c(num: number) {
    contexts.updateAsync((update) => {
      setTimeout(() => {
        this.a += num;
        update();
      }, 500);
    });
  }
}

const Parent = () => {
  return (
    <Provider<TExample> contexts={contexts} value={new Example()}>
      <Child />
    </Provider>
  );
};

• Invoke useContext and use contexts.getContext as param.(if you prefer class component, use contexts.getContext('key').Consumer instead)
• Call context.dispatch to update data.

const Child = () => {
  const a = useContext(contexts.getContext('a'));
  return (
    <>
      <div>{a}</div>
      <button onClick={() => contexts.dispatch({ type: 'b', params: [1] })}>
        update
      </button>
      <button onClick={() => contexts.dispatch("c", 1)}>
        async update
      </button>
    </>
  );
};

API

getConTexts

const contexts = getConTexts() 

Used to create context, see also following which is related content of contexts.

---

Provider

<Provider contexts={contexts} value={value} >...</Provider> 

Provider data for children.

• contexts: object (required)
• value: object (required)

---

context.getContext

const value = React.useContext(context.getContext(key))

Obtain current value of the value in Provider.

• key: string (required)

---

context.dispatch

context.dispatch({type: key, params: argsArray})
// or for short
context.dispatch(key, arg1, arg2, ...argN)
// or used to return something that is return statement of the property of instance
return context.dispatch(key) 

Invoke function of value in Provider and render related components, you can also use it to return what is return statement of the property of instance.

• key: string (required)
• argsArray: Array (optional)
• argN: the NTH param

---

context.updateAsync

contexts.updateAsync(update=>{ update() })

Used to run asynchronous code.

• update: function (required)

---

Bug tracker

If you find a bug, please report it here on Github!