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。

ReactJS是一个javascript库，用于构建web界面。你需要一个像webpack这样的捆绑器，并尝试安装你建立网站所需的模块。

React Native是一个javascript框架，它包含了编写多平台应用程序(如iOS或Android)所需的一切。你需要安装xcode和android studio来构建和部署你的应用。

与ReactJS不同，React-Native不使用HTML，而是使用类似的组件，你可以跨ios和android来构建你的应用程序。这些组件使用真正的本地组件来构建ios和android应用程序。因此，React-Native应用程序感觉真实，不像其他混合开发平台。组件还增加了代码的可重用性，因为你不需要在ios和android上再次创建相同的用户界面。

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/

区别很简单。

我们使用React开发web应用程序，使用React Native开发移动应用程序。

React更专注于改进UI(用户界面)，而RN则为所有操作系统共享一个公共逻辑层。这为现在已经处理了很长一段时间的问题提供了解决方案，例如开发效率低、部署时间较慢和开发人员生产力较低。

需要注意的是，React是一个用于web开发的库，而React Native是一个平台。

另一件有趣的事情是，当您想要使用RN时，您拥有启动项目所需的一切。另一方面，用React创建一个新项目意味着你只选择了构建web应用程序所需的众多库中的一个。

你可以在那篇文章中找到更多有用的信息: https://pagepro.co/blog/react-native-faq-all-you-need-to-know

首先是相似之处:React和React Native (RN)都是为了创建灵活的用户界面而设计的。这些框架有很多好处，但最基本的一点是它们是为ui开发而设计的。Facebook在React之后几年开发了RN。

反应: Facebook设计的这个框架几乎就像在HTML/XML中编写JavaScript，这就是为什么标签被称为“JSX”(JavaScript XML)，类似于我们熟悉的类似HTML的标签，如<div>或<p>。React的一个标志是大写字母标记，它表示自定义组件，例如<MyFancyNavbar />，它也存在于RN中。然而，React使用DOM。DOM是为HTML而存在的，因此React是用于web开发的。

React Native: RN does not use HTML, and therefore is not used for web development. It is used for... virtually everything else! Mobile development (both iOS & Android), smart-devices (e.g. watches, TVs), augmented reality, etc. As RN has no DOM to interact with, instead of using the same sort of HTML tags used in React, it uses its own tags which are then compiled into other languages. For example, instead of <div> tags, RN developers use RN's built-in <View> tag, which compiles into other native code under the hood (e.g. android.view on Android; and UIView on iOS).

简而言之:它们非常相似(对于UI开发)，但用于不同的媒介。

我们无法准确地比较它们。用例中存在差异。

(2018更新)

反应

React的主要关注点是Web开发。

React’s virtual DOM is faster than the conventional full refresh model, since the virtual DOM refreshes only parts of the page. You can reuse code components in React, saving you a lot of time. (You can in React Native too.) As a business: The rendering of your pages completely, from the server to the browser will improve the SEO of your web app. It improves the debugging speed making your developer’s life easier. You can use hybrid mobile app development, like Cordova or Ionic, to build mobile apps with React, but is more efficiently building mobile apps with React Native from many points.

反应本地

React的扩展，针对移动开发。

Its main focus is all about Mobile User Interfaces. iOS & Android are covered. Reusable React Native UI components & modules allow hybrid apps to render natively. No need to overhaul your old app. All you have to do is add React Native UI components into your existing app’s code, without having to rewrite. Doesn't use HTML to render the app. Provides alternative components that work in a similar way, so it wouldn't be hard to understand them. Because your code doesn’t get rendered in an HTML page, this also means you won’t be able to reuse any libraries you previously used with React that renders any kind of HTML, SVG or Canvas. React Native is not made from web elements and can’t be styled in the same way. Goodbye CSS Animations!

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