npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

imook

v2.4.1

Published

基于[immer](https://immerjs.github.io/immer/docs/introduction)和[React Hooks](https://reactjs.org/docs/hooks-intro.html)的轻量的局部状态管理。

Downloads

7

Readme

imook

基于immerReact Hooks的轻量的局部状态管理。

✨特性

  • 局部Store,全局单一实例,精准定位store作用区间
  • 轻量,API简单化,类型提示友好
  • 无this, 状态不可变
  • 支持异步action,修改状态简单化
  • 支持读写分离和定制更新(衍生数据)
  • 支持中断更新
  • 同步逻辑批量更新

📦 安装

npm i imook
yarn add imook

⚡快速开始

1. 定义一个Store

import createLocalStore from "imook";

const initialState = 0;

const counterStore = createLocalStore(
  initialState,
  ({ commit, get }) => ({
    inc(step: number = 1) {
      commit((draftStore) => {
        draftStore.state += step;
      });
    }
  }),
  {
    uniqueKey:  "counterStore",
  }
);

export default counterStore;

2. 获取和修改状态

import counterStore from "./counterStore";

function Counter() {
  // 通过useState API获取状态
  const count = counterStore.useState();
  return (
    <div>
      count:{count}
      <button
        onClick={() => {
          // 通过actions修改状态
          counterStore.actions.inc();
        }}
      >
        +
      </button>
    </div>
  );
}

export default Counter;

💡API

createLocalStore(initialState, actionCreator, option)

createLocalStore接收初始状态initialState和actions的生成器actionCreator,还有标识全局单一实例的uniqueKey等option配置,返回一个Store对象。

actionCreator

action生成器函数,接收工具类对象ActionUtils作为参数,返回actions

const actionCreator = ({ commit, get }) => ({
  /**
   * get 用于获取当前的状态;
   * commit 用于修改状态, 接受一个函数updater作为参数,updater和immer中的produce的第二个参数保持一致,通过操作draftStore.state完成对state的修改
   */
  xxAction() {
    const {state} = get()
    commit((draftStore) => {
      // draftStore.state...
    });
  }
})

localStore.useState(...overloads)

调用Store对象返回的useState获取状态,通过重载支持多种形式获取,通过这种方式在状态变更会订阅更新,和React Hooks一样,该API必须在Function Component中使用。

  • const state = localStore.useState()

    • 不带参数,直接返回状态
    • 状态改变时直接更新
  • const state = localStore.useState(isDeepEqual)

    • 只有isDeepEqual(布尔值)一个参数,直接返回状态
    • isDeepEqual为false,状态改变时直接更新
    • isDeepEqual为true,状态改变时深比较前后两次状态,值不同时才更新
  • const derivedState = localStore.useState(mapStateFn)

    • 只有mapStateFn一个参数,mapStateFn以state作为参数,可自定义返回的状态
    • 状态改变时浅比较前后两次的衍生状态,值不同时才更新
  • const derivedState = localStore.useState(mapStateFn, isDeepEqual)

    • 第一个参数为mapStateFn,以state作为参数,可自定义返回的状态
    • 第二个参数为isDeepEqual,决定是否深比较前后两次的衍生状态,值不同时才更新

localStore.actions.xxx

调用Store对象返回的actions来修改状态,修改状态不限制使用方式。


/**
 * 直接在FC中使用
 */
function IncButton() {
  return (
      <button
        onClick={() => {
          counterStore.actions.inc();
        }}
      >
        +
      </button>
  );
}

/**
 * 基于actions自定义特定功能的actions
 */
const inc = counterStore.actions.inc

const inc10 = () => inc(10)

const dbInc = () => {
  inc()
  inc()
}

/**
 * 基于actions定义Custom Hooks
 */
const useVisibleTodos = () => {
  const todos = todosStore.useState()
  const filter = visibilityFilterStore.useState()
  const visibleTodos = getVisibleTodos(todos, filter)
    return {
    visibleTodos: visibleTodos as Todo[],
    toggleTodo: todosStore.actions.toggleTodo
  }
}

localStore.getState()

调用Store对象返回的getState获取当前的状态,值得注意的是这种方式不会订阅更新,它就像是一个内置的action,可在任何地方使用。


function IncButton() {
  return (
      <button
        onClick={() => {
          // 获取当前的状态
          const currState = counterStore.getState();
          if(currState...) ...
          counterStore.actions.inc();
        }}
      >
        +
      </button>
  );
}