tehc v1.2.3

tehc

Another state management library? - Yes, why not? Do we need this library? I think not but here you are anyway! 😁

Installation

npm install tehc

Usage

import { TehcProvider, useTehc } from 'tehc'

function Reader() {
  const [state] = useTehc()
  // state will be 'some-state' at first render
  // once clicking on the button in `Updater`
  // it will be updated to 'updated-state'
  return <p>{state}</p>
}

function Updater() {
  // first argument is the current state
  // it will change from 'some-state' to 'update-state' on the button click
  const [_, dispatch] = useTehc()
  return <button onClick={() => dispatch('updated-state')}>Update</button>
}

function App() {
  return (
    <TehcProvider store={{ state: 'some-state' }}>
      <Reader />
      <Updater />
    </TehcProvider>
  )
}

You have the possibility to read previous state much like useState callback function

function Comp() {
  const [state, dispatch] = useTehc()
  return (
    <button
      onClick={() => {
        // read previous state
        dispatch((prev) => prev + 1)
      }
    >
      Click me!
    </button>
  )
}

You can also pass a custom reducer to TehcProvider

import { TehcProvider, useTehc } from 'tehc'

// state.count will be 0 on first render
// clicking increment and decrement will update state.count to -1 or +1
function Counter() {
  const [state, dispatch] = useTehc()
  return (
    <div>
      <p>{state.count}</p>
      <button onClick={() => dispatch({ type: 'increment' })}>increment</button>
      <button onClick={() => dispatch({ type: 'decrement' })}>decrement</button>
    </div>
  )
}
function App() {
  function reducer(state, action) {
    switch (action.type) {
      case 'increment':
        return { count: state.count + 1 }
      case 'decrement':
        return { count: state.count - 1 }
      default:
        throw new Error('Noo!')
    }
  }
  return (
    <TehcProvider store={{ state: { count: 0 }, reducer }}>
      <Counter />
    </TehcProvider>
  )
}

If you prefer you can you the HOC

const ComponentHoc = TehcHoc(({ state, dispatch }) => {
  // use state and dispatch the same as show above
})

function App() {
  return (
    <TehcProvider store={{ state: 'some-state' }}>
      <ComponentHoc />
    </TehcProvider>
  )
}