Reactjs 未找到模块:Can';t解析'/导航栏';在react中编译时出错
我正在完成一个应用程序的教程,在前端工作时,我为导航栏制作了一个单独的文件:Reactjs 未找到模块:Can';t解析'/导航栏';在react中编译时出错,reactjs,Reactjs,我正在完成一个应用程序的教程,在前端工作时,我为导航栏制作了一个单独的文件: import React, { Component } from 'react' class Navbar extends Component { render() { return ( <nav className="navbar navbar-dark fixed-top bg-dark flex-md-nowrap p-0 shadow">
import React, { Component } from 'react'
class Navbar extends Component {
render() {
return (
<nav className="navbar navbar-dark fixed-top bg-dark flex-md-nowrap p-0 shadow">
<a
className="navbar-brand col-sm-3 col-md-2 mr-0"
href="http://www.dappuniversity.com/bootcamp"
target="_blank"
rel="noopener noreferrer"
>
EthSwap
</a>
</nav>
);
}
}
export default Navbar;
保存并重新加载网页时,出现以下错误:
./src/components/App.js
未找到模块:无法解析“C:\Users\34632\eth\u swap1\src\components”中的“./Navbar”
我不确定问题是什么,因为我昨天已经顺利通过了这一点,现在问题依然存在。有人知道这里发生了什么吗
这是我的目录
这是App.js文件
import React, { Component } from 'react'
import Web3 from 'web3'
import from ' ./Navbar'
import './App.css'
class App extends Component {
async componentWillMount() {
await this.loadWeb3()
await this.loadBlockchainData()
}
async loadBlockchainData() {
const web3 = window.web3
const accounts = await web3.eth.getAccounts()
this.setState({ account: accounts[0] })
const ethBalance = await web3.eth.getBalance(this.state.account)
this.setState({ ethBalance })
console.log(this.state.ethBalance)
}
async loadWeb3() {
if (window.ethereum) {
window.web3 = new Web3(window.ethereum)
await window.ethereum.enable()
}
else if (window.web3) {
window.web3 = new Web3(window.web3.currentProvider)
}
else {
window.alert('Non-Ethereum browser detected. You should consider trying Metamask!')
}
}
constructor(props) {
super(props)
this.state = {
account: '',
ethBalance: '0'
}
}
render() {
console.log(this.state.account)
return (
<div>
<Navbar />
<div className="container-fluid mt-5">
<div className="row">
<main role="main" className="col-lg-12 d-flex text-center">
<div className="content mr-auto ml-auto">
<a
href="http://www.dappuniversity.com/bootcamp"
target="_blank"
rel="noopener noreferrer"
>
</a>
<h1>Hello World!</h1>
</div>
</main>
</div>
</div>
</div>
);
}
}
export default App;
import React,{Component}来自“React”
从“Web3”导入Web3
从“/Navbar”导入
导入“./App.css”
类应用程序扩展组件{
异步组件willmount(){
等待此消息。loadWeb3()
等待此消息。loadBlockchainData()
}
异步loadBlockchainData(){
const web3=window.web3
const accounts=wait web3.eth.getAccounts()
this.setState({account:accounts[0]})
const ethBalance=wait web3.eth.getBalance(this.state.account)
this.setState({ethBalance})
console.log(this.state.ethBalance)
}
异步加载web3(){
if(window.ethereum){
window.web3=新的web3(window.ethereum)
等待window.ethereum.enable()
}
else if(window.web3){
window.web3=新的web3(window.web3.currentProvider)
}
否则{
窗口。警报(“检测到非EnthUM浏览器。您应该考虑尝试元代码!”)
}
}
建造师(道具){
超级(道具)
此.state={
帐户:“”,
帐户余额:“0”
}
}
render(){
console.log(this.state.account)
返回(
你好,世界!
);
}
}
导出默认应用程序;
从导入中删除空格
发件人:
致:
你能更新你的目录结构吗?完成。这就是您想要的吗?我在尝试以下操作时遇到此错误:元素类型无效:需要字符串(对于内置组件)或类/函数(对于复合组件),但得到:对象。您可能忘记了从定义组件的文件中导出组件,或者您可能混淆了默认导入和命名导入。检查
App
的渲染方法。▶ 29个堆栈帧被折叠。您能给我们看一下您的应用程序组件吗?当然,您想让我给您看什么?我将发布整个应用程序。您缺少导入的名称,请将import from./Navbar'
更改为import Navbar from./Navbar'代码>在你的App.js中
import React, { Component } from 'react'
import Web3 from 'web3'
import from ' ./Navbar'
import './App.css'
class App extends Component {
async componentWillMount() {
await this.loadWeb3()
await this.loadBlockchainData()
}
async loadBlockchainData() {
const web3 = window.web3
const accounts = await web3.eth.getAccounts()
this.setState({ account: accounts[0] })
const ethBalance = await web3.eth.getBalance(this.state.account)
this.setState({ ethBalance })
console.log(this.state.ethBalance)
}
async loadWeb3() {
if (window.ethereum) {
window.web3 = new Web3(window.ethereum)
await window.ethereum.enable()
}
else if (window.web3) {
window.web3 = new Web3(window.web3.currentProvider)
}
else {
window.alert('Non-Ethereum browser detected. You should consider trying Metamask!')
}
}
constructor(props) {
super(props)
this.state = {
account: '',
ethBalance: '0'
}
}
render() {
console.log(this.state.account)
return (
<div>
<Navbar />
<div className="container-fluid mt-5">
<div className="row">
<main role="main" className="col-lg-12 d-flex text-center">
<div className="content mr-auto ml-auto">
<a
href="http://www.dappuniversity.com/bootcamp"
target="_blank"
rel="noopener noreferrer"
>
</a>
<h1>Hello World!</h1>
</div>
</main>
</div>
</div>
</div>
);
}
}
export default App;
import Navbar from ' ./Navbar'
import Navbar from './Navbar';