React 中引入 CSS 高阶用法的方案详解

import React from "react";
//驼峰命名法声明属性
const div1 = {
  width: "300px",
  margin: "30px auto",
  backgroundColor: "#44014C",  
  minHeight: "200px",
  boxSizing: "border-box"
};
export default const App = () => {
  constructor(props, context) {
    super(props);
  }
  render() {
    return (
     <div>
       <div style={div1}>123</div>
       <div style={{backgroundColor:"red"}}>
     </div>
    );
  }
}

.title {
  color: red;
  font-size: 20px;
}
.desc {
  color: green;
  text-decoration: underline;
}

import React, { PureComponent } from 'react';
import Home from './Home';
import './App.css';
export default const App = () => {
  render() {
    return (
      <div className="app">
        <h2 className="title">我是App的标题</h2>
        <p className="desc">我是App中的一段文字描述</p >
        <Home/>
      </div>
    )
  }
}

import React, { PureComponent } from 'react';
import Home from './Home';
// document.getElementById("root")
import styles from "./index.module.css";
export default const App = () => {
  render() {
    return (
      <div className={styles.root}>
        <h2 className="title">我是App的标题</h2>
        <p className="desc">我是App中的一段文字描述</p >
        <Home/>
      </div>
    )
  }
}

export const SelfLink = styled.div`
  height: 50px;
  border: 1px solid red;
  color: yellow;
`;
export const SelfButton = styled.div`
  height: 150px;
  width: 150px;
  color: ${props => props.color};
  background-image: url(${props => props.src});
  background-size: 150px 150px;
`;

import React from "react";
import { SelfLink, SelfButton } from "./style";
export default const App = () =>{
  constructor(props, context) {
    super(props);
  }  
  render() {
    return (
     <div>
       <SelfLink title="People's Republic of China">app.js</SelfLink>
       <SelfButton color="palevioletred" style={{ color: "pink" }} src={fist}>
          SelfButton
        </SelfButton>
     </div>
    );
  }
}