import { makeStyles } from "@material-ui/core/styles" ; const Footer = ( ) => { const classes = useStyles ( ) ; return ( < div className = { classes . container } > Copyright © 2021 阿里巴巴前端练习生计划 — — 拥抱变化 < /div>); } ; export default Footer ; const useStyles = makeStyles ( { container : { height : "50px" , color : "#d3d7da" , lineHeight : "50px" , textAlign : "center" , position : "relative" , top : '100%' , width : "100%" } , } ) ;