Failed to add animation to Animation Add-Ons

I tried to add animation using Animation Add-Ons, following the example in the official document, but the animation didn"t work at all. Why?

jsx

import React from "react"
import ReactCSSTransitionGroup from "react-addons-css-transition-group"
import "./login.css"

class login extends React.Component {
  render() {
    return (
      <div className="bg">
        <div className="rocket animated infinite bounce"></div>
        <div className="cloud"></div>
        <div className="cloud2"></div>
        <ReactCSSTransitionGroup
          transitionName="example"
          transitionEnterTimeout={1000}
          transitionLeaveTimeout={1000}>
          <div key="111">33333333333333</div>
        </ReactCSSTransitionGroup>
      </div>
    )
  }
}
export default login

css

.example-enter {
  color: -sharpfff;
}

.example-enter.example-enter-active {
  color: -sharp000;
  transition: color 1000ms ease-in;
}

.example-leave {
  opacity: 1;
}

.example-leave.example-leave-active {
  opacity: 0.01;
  transition: opacity 300ms ease-in;
}
Feb.28,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c28476-3305a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c28476-3305a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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