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/

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。

这里有一个很好的解释:

Reactjs是一个同时支持前端和服务器的JavaScript库。此外，它还可以用于为移动应用程序和网站创建用户界面。

React Native是一个跨平台的移动框架，使用Reactjs来构建应用程序和网站。React Native编译成本地应用程序组件，使程序员能够用JavaScript构建可以在不同平台(如Windows、Android、iOS)上运行的移动应用程序。

Reactjs can be described as a base derivative of React DOM, for the web platform while React Native is a base derivative in itself, which means that the syntax and workflow remain the same, but components alter. Reactjs, eventually, is a JavaScript library, which enables the programmer to create an engaging and high performing UI Layer while React Native is an entire framework for building cross-platform apps, be it web, iOS or Android. In Reactjs, virtual DOM is used to render browser code in Reactjs while in React Native, native APIs are used to render components in mobile. The apps developed with Reactjs renders HTML in UI while React Native uses JSX for rendering UI, which is nothing but javascript. CSS is used for creating styling in Reactjs while a stylesheet is used for styling in React Native. In Reactjs, the animation is possible, using CSS, just like web development while in React Native, an animated API is used for inducing animation across different components of the React Native application. If the need is to build a high performing, dynamic, and responsive UI for web interfaces, then Reactjs is the best option while if the need is to give mobile apps a truly native feeling, then React Native is the best option.

更多信息请点击:https://www.simform.com/reactjs-vs-reactnative/

React Js是一个Javascript库，你可以使用React开发和运行更快的web应用程序。

React Native让你只使用JavaScript构建移动应用程序，它用于移动应用程序开发。更多信息请点击这里https://facebook.github.io/react-native/docs/getting-started.html

在Reactjs中，虚拟DOM用于在Reactjs中渲染浏览器代码，而在React Native中，本地api用于渲染移动设备中的组件。

用Reactjs开发的应用程序在UI中渲染HTML，而React Native使用JSX来渲染UI，这只是javascript。