反应本地

它是一个使用JavaScript构建本地应用程序的框架。 它编译为本地应用程序组件，这使它成为可能 构建原生移动应用程序。 不需要彻底检查你的旧应用程序。你所要做的就是添加React 将本地UI组件添加到现有应用程序代码中，而不必这样做 重写。

js的反应

它既支持前端web，也支持在服务器上运行 构建用户界面和web应用程序。 它还允许我们创建可重用的UI组件。 你可以在React JS中重用代码组件，节省大量时间。

简单的React Js是为web React Native是为跨平台移动应用程序!

React is a framework for building applications using JavaScript. React Native is an entire platform allowing you to build native, cross-platform mobile apps, and React.js is a JavaScript library you use for constructing a high performing UI layer. React.js is the heart of React Native, and it embodies all React’s principles and syntax, so the learning curve is easy. The platform is what gave rise to their technical differences. Like the browser code in React is rendered through Virtual DOM while React Native uses Native API’s to render components on mobile. React uses HTML and with React Native, you need to familiarize yourself with React Native syntax. React Native doesn’t use CSS either. This means you’ll have to use the animated API which comes with React Native to animate different components of your application.

最重要的是，React是为你的web界面构建动态，高性能，响应性UI的理想选择，而React Native是为了给你的移动应用程序一个真正的原生感觉。

雷夫:what-is-the-difference-between-react-js-and-react-native

反应:

React是一个声明性的、高效的、灵活的JavaScript库 构建用户界面。

本机反应:

React Native lets you build mobile apps using only JavaScript. It uses the same design as React, letting you compose a rich mobile UI from declarative components. With React Native, you don't build a “mobile web app”, an “HTML5 app”, or a “hybrid app”. You build a real mobile app that's indistinguishable from an app built using Objective-C or Java. React Native uses the same fundamental UI building blocks as regular iOS and Android apps. You just put those building blocks together using JavaScript and React. React Native lets you build your app faster. Instead of recompiling, you can reload your app instantly. With hot reloading, you can even run new code while retaining your application state. Give it a try - it's a magical experience. React Native combines smoothly with components written in Objective-C, Java, or Swift. It's simple to drop down to native code if you need to optimize a few aspects of your application. It's also easy to build part of your app in React Native, and part of your app using native code directly - that's how the Facebook app works.

基本上React是web应用视图的UI库，使用javascript和JSX, React native是React之上的一个额外库，用于iOS和Android设备的原生应用。

React代码示例:

import React, { Component } from 'react';
import ReactDOM from 'react-dom';

class Clock extends React.Component {
  constructor(props) {
    super(props);
    this.state = {date: new Date()};
  }

  componentDidMount() {
    this.timerID = setInterval(
      () => this.tick(),
      1000
    );
  }

  componentWillUnmount() {
    clearInterval(this.timerID);
  }

  tick() {
    this.setState({
      date: new Date()
    });
  }

  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>
      </div>
    );
  }
}

ReactDOM.render(
  <Clock />,
  document.getElementById('root')
);

React Native代码示例:

import React, { Component } from 'react';
import { Text, View } from 'react-native';

class WhyReactNativeIsSoGreat extends Component {
  render() {
    return (
      <View>
        <Text>
          If you like React on the web, you'll like React Native.
        </Text>
        <Text>
          You just use native components like 'View' and 'Text',
          instead of web components like 'div' and 'span'.
        </Text>
      </View>
    );
  }
}

有关React的更多信息，请访问facebook团队创建的官方网站:

https://reactjs.org/

有关React Native的更多信息，请访问下面的React Native网站:

https://reactnative.dev/

ReactJS是一个用于构建UI组件层次结构的框架。每个组件都有状态和道具。数据通过道具从顶层流向底层组件。在顶级组件中使用事件处理程序更新状态。

React native使用React框架为移动应用程序构建组件。React native为iOS和Android平台提供了一组基本的组件。React Native中的一些组件是Navigator, TabBar, Text, TextInput, View, ScrollView。这些组件内部使用原生iOS UIKit和Android UI组件。React native还允许使用NativeModules，其中用iOS的objective - c和Android的Java编写的代码可以在JavaScript中使用。

注意:React Native作为一个框架，允许以类似HTML和CSS的语法开发移动应用程序。原生组件在原生开发中有效地取代了HTML。

React是一个用于构建用户界面的JavaScript库。它用于重用UI组件。 React Native是一个JavaScript框架，用于为iOS和Android编写真实的原生渲染移动应用程序。 两者都是由facebook开发的，它们共享相同的生命周期方法。