logo.svg图片存放在src目录下2、public目录下public目录不会被webpac_react移动端的公共样式">
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react脚手架搭建好后,在App.js中引入了logo
import logo from './logo.svg';
使用
<img src={logo} className="App-logo" alt="logo" />
logo.svg图片存放在src目录下
public目录不会被webpack打包。神奇的是,index.html文件也在此目录下,该文件里有个id为root的div,用来渲染src里的index.js。
在index.html里也有引入public下的图片,比如ico
<link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
我想组件中怎么用public下的静态文件
<img src={process.env.PUBLIC_URL + '/favicon.ico'} ></img>
process.env?
在src目录下新建assets文件夹,建立ant.css文件
h2{color: tomato;}
再在src/components/ant.js组件中引入
import React from 'react';
import '../assets/ant.css'
class ant extends React.Component{
render(h) {
return(
<div>
<h2>满堂花醉三千客</h2>
<img src={process.env.PUBLIC_URL + '/favicon.ico'} ></img>
</div>
)
}
}
export default ant
Vue中的公共方法:https://blog.csdn.net/m0_56262444/article/details/117807607?spm=1001.2014.3001.5501
在assets文件夹下新建ant.js文件
系统时间:
export function settime() { return function(value) { var date = new Date(value); var year = date.getFullYear(); var month = date.getMonth() + 1; month = month < 10 ? "0" + month : month; var day = date.getDate(); day = day < 10 ? "0" + day : day; var hour = date.getHours(); hour = hour < 10 ? "0" + hour : hour; var minute = date.getMinutes(); minute = minute < 10 ? "0" + minute : minute; var second = date.getSeconds(); second = second < 10 ? "0" + second : second; return year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second; } } const systime=settime() export{ systime }
在Ant.js组件中引入
import React from 'react'; import '../assets/ant.css' import {systime} from '../assets/ant' class ant extends React.Component{ constructor(){ super() this.state={ temp:'' } } render(h) { return( <div> <h2>满堂花醉三千客</h2> <img src={process.env.PUBLIC_URL + '/favicon.ico'} ></img> {this.state.temp} </div> ) } componentDidMount(){ this.timer=setInterval(() => { this.setState({temp:systime(new Date())}) }, 1000); } componentWillUnmount(){ if (this.timer) { clearInterval(this.timer) } } } export default ant
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