React Js使用HTML Dom进行操作。 但是React native使用的是移动(iOS/android)原生ui组件。

React Js是一个前端javascript库，它是一个很大的库，而不是一个框架

它遵循有助于构建的基于组件的方法 可重用的UI组件 它用于开发复杂的交互式web和移动UI 尽管它在2015年才开源，但它拥有最大的社区之一支持它。

ReactNative是一个开源的移动应用程序框架。

这是一个混合工具的应用程序开发的操作系统和android。你不需要写两次代码。 它使用本地组件和react。 它还为您提供了访问服务器(firebase)的权限。 如需进一步帮助，请点击以下链接: https://reactnative.dev/ https://nativebase.io/

React和React-native之间的主要区别是React带有基于Web的UI组件，而React native则带有与移动相关的UI小部件，其余一切几乎相似。

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/

React用于在浏览器中工作的web应用程序。 React Native用于android和IOS应用程序，这些应用程序在移动应用程序中工作。