React 状态管理 - Mobx 入门（下）接入实战

目录

Mobx接入实战

Mobx构造复杂应用需要注意的

Mobx5 Or Mobx4

Mobx5

Mobx4

@/package.json

@/src/routes/index.jsx

@/src/app.jsx

@/src/index.jsx

@/src/models/home/index.js

@/src/models/index.js

@/src/containers/home/index.jsx

Mobx VS Redux

---

Mobx接入实战

对状态变更更为细腻，Mobx更适合局部场景

Mobx构造复杂应用需要注意的

1. Store单例：Store状态全局管理是解决复杂应用的标配
2. 状态跨组件：跨组件传递可以通过Provider传递
3. 拆分局部状态：Mobx的特性可以使一些局部状态在当前组件完成
4. 清理autorun：componentWillUnmount中执行autorun返回的函数

Mobx5 Or Mobx4

Mobx5

---

• Mobx5内部实现对象observable的核心是基于ES6的proxy。
• 而目前proxy没有对应的polyfill。所以只能运行在现代浏览器（Edge可以）上。

Mobx4

---

• Mobx4内部实现对象observable的核心是基于Object.defineProperty。
• Observable数组并非真正的数组，其继承自对象。所以与普通的数组对象及某些行为不一样。

@/package.json

// package.json
{
  "name": "react-mobx-demo",
  "version": "1.0.0",
  "description": "react mobx feature",
  "main": "index.js",
  "scripts": {
    "start": "webpack-dev-server --hot --color --progress --host localhost --config webpack.config.js --env.dev",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/luzuoquan/react-mobx-demo.git"
  },
  "keywords": [
    "react",
    "mobx"
  ],
  "author": "luzuoquan",
  "license": "MIT",
  "bugs": {
    "url": "https://github.com/luzuoquan/react-mobx-demo/issues"
  },
  "homepage": "https://github.com/luzuoquan/react-mobx-demo#readme",
  "devDependencies": {
    "@babel/cli": "^7.8.4",
    "@babel/core": "^7.9.6",
    "@babel/plugin-proposal-class-properties": "^7.8.3",
    "@babel/plugin-proposal-decorators": "^7.8.3",
    "@babel/plugin-proposal-export-default-from": "^7.8.3",
    "@babel/plugin-transform-runtime": "^7.9.6",
    "@babel/preset-env": "^7.9.6",
    "@babel/preset-react": "^7.9.4",
    "babel-eslint": "^10.1.0",
    "babel-loader": "^8.1.0",
    "eslint": "6.8.0",
    "eslint-config-airbnb": "^18.1.0",
    "eslint-import-resolver-webpack": "^0.12.1",
    "eslint-plugin-import": "^2.20.2",
    "eslint-plugin-jsx-a11y": "^6.2.3",
    "eslint-plugin-react": "^7.20.0",
    "eslint-plugin-react-hooks": "3",
    "html-webpack-plugin": "^4.3.0",
    "webpack": "^4.43.0",
    "webpack-cli": "^3.3.11",
    "webpack-dev-server": "^3.11.0"
  },
  "dependencies": {
    "@babel/runtime": "^7.9.6",
    "core-js": "3",
    // mobx
    "mobx": "^5.15.4",
    "mobx-react": "^6.2.2",
    // 类型规划
    "prop-types": "^15.7.2",
    // react
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    // router
    "react-router": "^5.2.0",
    "react-router-dom": "^5.2.0",
    "regenerator-runtime": "^0.13.5",
    "whatwg-fetch": "^3.0.0"
  }
}

@/src/routes/index.jsx

import React from 'react';
import {
  BrowserRouter,
  Route,
  Switch,
} from 'react-router-dom';
import Home from '@/containers/home';
export default function () {
  return (
    <BrowserRouter>
      <Switch>
        <Route exact path="/" component={Home} />
      Switch>
    BrowserRouter>
  );
}

@/src/app.jsx

import React from 'react';
import Routes from '@/routes';
export default () => <Routes />;

@/src/index.jsx

import React from 'react';
import { render } from 'react-dom';
// 全局变量注入
import { Provider } from 'mobx-react';
// 全局store
import store from './models';
import App from './app';
render(
  <Provider {...store}>
    <App />
  Provider>,
  document.querySelector('#app')
);

@/src/models/home/index.js

import { observable, action } from 'mobx';
export class HomeInfo {
  @observable name = '云课堂';
  @action
  updateName = (params) => {
    // Mobx中可以直接修改
    this.name = params;
  };
}
export default new HomeInfo();

@/src/models/index.js

import homeInfo from './home';
export default {
  homeInfo,
};

@/src/containers/home/index.jsx

import { observer, inject } from 'mobx-react';
import React, { Component } from 'react';
import PropTypes from 'prop-types';
// 全局变量注入
@inject('homeInfo')
// 关联组件
@observer
export default class Home extends Component {
  static propTypes = {
    homeInfo: PropTypes.objectOf(PropTypes.object),
  };
  static defaultProps = {
    homeInfo: {},
  };
  handleClick = () => {
    const {
      homeInfo: { updateName },
    } = this.props;
    updateName('Mobx接入实战 - 云课堂');
  };
  render() {
    const {
      homeInfo: { name },
    } = this.props;
    return (
      <div className='mobx'>
        <p>{name}p>
        <button type='button' onClick={this.handleClick}>
          更改
        button>
      div>
    );
  }
}

Mobx VS Redux

Mobx:适合小而简单的工程

Redux：适合大型应用