🦏 React Rhino

React Rhino is a simple yet powerful state management library for React

Installation

# If you use npm:
npm install react-rhino

# Or if you use Yarn:
yarn add react-rhino

Why choose Rhino?

🏋️‍♂️ Lightweight

Only ~770 bytes when Minified & Gzipped.

🚀 Syntax you already know

Offers a straightforward syntax similar to the built-in hooks of React.

👷‍♂️ Easy to Extend

Add a new global state with just a single line of code, it's that simple.

📐 Easy to Use

Get started with Rhino in a short amount of time.

Online Playground

Use the button below to play with a small demo project to help familiarize with state management using React Rhino.

Usage

Set up React Rhino in your project using these simple steps

Step 1

Wrap your app with RhinoProvider and pass the store object to it

Note: store is an object in which each entries will become a global state. In store, keys will be the identifiers for each state and their corresponding value will be the initial values of that particular state.

import { RhinoProvider } from 'react-rhino';

const store = {
 dark_mode: true
}

function App() {
  return (
    <RhinoProvider store={store}>
      <Counter />
    </RhinoProvider>
  );
}

Step 2

Consume global state in any of your components, by using the useRhinoState hook as in the below example

import { useRhinoState } from "react-rhino"

 const DarkModeButton = () => {

 /* "dark_mode" is the key given to this state in the store */
 const [isDarkMode, setDarkMode] = useRhinoState("dark_mode"); 

 const toggleDarkMode = () => {
   setDarkMode(currentMode => !currentMode);
 }

 return(
   <p>{ isDarkMode ? "Switch to Light" : "Switch to dark" }</p>
   <button onClick={toggleDarkMode}>Toggle</button>
 );
}

export default DarkModeButton;

Note : useRhinoState is similar to the useState hook of React. useRhinoState will also returns an array containing the state and it's updater function. The only difference is that unlike useState hook we pass the key of the global state to useRhinoState hook.

API / Documentation

RhinoProvider

Components that use Rhino state need RhinoProvider to appear somewhere in the parent tree. A good place to put this is in your root component.

RhinoProvider takes only a single prop, store. Each entries in store will be converted to a global state. Each key in store represents a global state and the values corresponding to them becomes the initial values of those states respectively.

import { RhinoProvider } from "react-rhino";

const store={
   name: "John Doe", // Will become a global state with initial value "John Doe"
   isDarkMode : true, // Will become another global state with initial value true
}

function App() {
  return (
    <RhinoProvider store={store}>
      <SearchBar />
    </RhinoProvider>
  );
}

useRhinoState

Takes key representing the state as argument and returns an array with the state value and the function to update the state.

This hook is pretty similar to useState hook in React.

const [darkMode, setDarkMode] = useRhinoState("isDarkMode");
/* Here "isDakMode" is the key representing the state */

useRhinoValue

Takes key representing the state as argument and returns only the the state value.

You can use this if your component only needs to read the state but perform no updates.

const darkMode = useRhinoValue("isDarkMode");
/* Here "isDakMode" is the key representing the state */

useSetRhinoState

Takes key representing the state as argument and returns the function to update the state.

You can use this if your component only needs the updater function and not the state itself. Having an updater function in the component will not trigger a re-render on the state change.

const setDarkMode = useSetRhinoState("isDarkMode");
/* Here "isDakMode" is the key representing the state */

Some Examples

A Component which only read the state and not the updater function

For Components that only read the state values, declare a constant inside the component and assign the constant to a call to useRhinoValue("key_to_identify_state_value") passing in key as an argument like:

menu_bar.js

import { useRhinoValue } from "react-rhino"

const Menu = () => {

 /* useRhinoValue only return state value */
 const isDarkMode = useRhinoValue("dark_mode"); 

 return(
   <nav>
    {/* Other nav contents */}
    <p>{`Currently it is ${isDarkMode ? "Dark" : "Light"}`}</p>
   </nav>
 );

 export default Menu;
}

A Component which only accesses the updater function

For a component that only updates the state, import useSetRhinoState in the component file that performs update to the global state.

Declare a constant inside the component and assign the constant to a call to useSetRhinoState("key_to_identify_state_value") passing in a key identifying a state value as an argument.

toggle.js

This component will not re-render if the state isDarkMode changes as it only uses the updater function and not the state itself.

import { useSetRhinoState } from "react-rhino"

const Toggle = () => {

 /* useSetRhinoState only return updater function */
 const setDarkMode = useSetRhinoState("dark_mode");

 const toggleDarkMode = () => {
   setDarkMode(currentMode => !currentMode);
 }

 return <button onClick={toggleDarkMode}>Toggle DarkMode</button>

 export default Toggle;
}

A Component accessing multiple global state values

Accessing multiple state values is pretty straight forward, declare constants to hold different state values and access state values by calling useRhinoValue("key") passing a key identifying with a state value as an argument.

details.js

import { useRhinoValue } from "react-rhino"

const Details= () => {
  /*  
      Separate calls to useSetRhinoState return separate state values
      based on keys that identify with state value.
  */
  const userName = useRhinoValue("name")
  const addressDetails = useRhinoValue("addressDetails")
  return(<div>
      <span>{userName}</span>
  </div>
  )

}

Author

Aromal Anil

License

MIT License

Copyright (c) 2021 Aromal Anil

Permission is hereby granted, free of charge, to any person obtaining a copy
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in the Software without restriction, including without limitation the rights
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copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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SOFTWARE.