use-immutable v0.3.0

use-immutable

A hook for creating the immutable state with mutations on React, it's based on immer.

Features

• Update state by mutating
• Snapshot
• Time traveling

Usage

• Installation

yarn add use-immutable

• Example: Demo

import React from 'react';
import { useImmutable } from 'use-immutable';

const TodoList = () => {
  const todo = useImmutable({
    text: '',
    list: [],
  });
  const updateText = (e) =>
    todo.set(() => {
      todo.state.text = e.target.value;
    });
  const addTodo = () =>
    todo.set(() => {
      todo.state.list.push(todo.state.text);
      todo.state.text = '';
    });
  return (
    <div>
      <input value={todo.state.text} onChange={updateText} />
      <button onClick={addTodo}>Add</button>
      <ul>
        {todo.state.list.map((item, index) => (
          <li key={index}>{item}</li>
        ))}
      </ul>
    </div>
  );
};

APIs

instance.state

Get the current component status.

instance.snapshot()

Take a snapshot of the current state

instance.pop()

Update the state from the snapshot

instance.clear()

Clear the snapshot

instance.length

Get the snapshot length

instance.index

Index of the current state in the snapshot

instance.set()

Set a new state value