作用相当于下面②和③这两句话 ②默认导入(default import):导入react模块(组件)中的默认组件,并且命名为React import React from 'react' ③成员导入(member import 、named import): 引入react文件中的成员组件Component,可以用{}形式引入多个成员组件 import {Component} from 'react' 其中③的意思是导入'react'...
importReact, {Component}from'react'; 在JavaScript 中,默认导入和命名导入是分开的,因此您不能像默认导入那样导入命名导入。下面,将名称Component设置为'react'包的默认导出(与React.Component: importComponentfrom'react';
Home.js子组件代码 importReact, {Component}from'react';import{Button}from'antd';exportclassHomeextendsComponent{constructor(props) {super(props);this.state= { }; }render() {return(<Buttontype='danger'>{this.props.name}</Button>); } } 配置@路径智能提示 在测试过程中,虽然应用了@引入组件的方...
import React, { Component }from'react';//路由依赖import { HashRouter, Route, Switch }from'react-router-dom';//异步组件import AsyncComponentfrom'./asyncComponent.jsx';//组件页面constHome = AsyncComponent(() => import(/*webpackChunkName: "Home"*/'./Home/index.jsx'));constCity = AsyncCo...
react-loadable 使用高阶组件动态import组件,实现代码分割(code-splitting), 使用后: importReact,{Component}from'react';importLoadablefrom'react-loadable';constLoadableBar=Loadable({loade
react import type 声明只能在typescript文件中使用 import react from react,因为,babel会将jsx代码转换转换前importReact,{Component}from'react';classProcessextendsComponent{render(){return(<div>哈哈哈</div>)}}转换后importReact,{Component}from're
Paste_Image.png 意思是不能按照上面那种将component和view放在一个大括号里,而应该是将react和react-native的组件分开引入,如下: importReact,{Component}from'react';import{StyleSheet,Text,View,TouchableOpacity,}from'react-native'; 重新刷新,报错消失运行正常。
根组件(root component)文件 在编写你的第一个组件章节,你创建了一个Profile组件和一个Gallerycomponent 组件,并渲染它们: App.js Fork These currently live in aroot component file,namedApp.jsin this example. InCreate React App, your app lives insrc/App.js. Depending on your setup, your root compo...
Exports the rootAppcomponent as adefault export. Note You may encounter files that leave off the.jsfile extension like so: import Gallery from './Gallery'; Either'./Gallery.js'or'./Gallery'will work with React, though the former is closer to hownative ES Moduleswork. ...
- 让我以一个简单的React Router例子开始。我们将有三条路由分别是: __/__,__/topics__,__/settings__。 ``` jsx import React, { Component } from 'react' import { BrowserRouter as Router, Route, Link, } from 'react-router-dom'