react使用CSS实现react动画功能示例

import React, { Component } from 'react';
 
class Boss extends Component {
  constructor(props) {
    super(props);
    this.state = {
      isShow:true
    }
    this.toTogger=this.toTogger.bind(this)
  }
  render() { 
    return ( 
      <div>
        <div className={this.state.isShow?'show':'hide'}>大BOSS--孙悟空</div>
        <div><button onClick={this.toTogger}>召唤</button></div>
      </div>
    );
  }
 
  toTogger() {
    this.setState({
      isShow:this.state.isShow?false:true
    })
  }
}
 
export default Boss;

.hide{opacity: 1;transition: all 1.5s ease-in;}
.show{opacity: 0;transition: all 1.5s ease-in;}

.hide{animation: hide-item 2s ease-in forwards;}
.show{animation: show-item 2s ease-in forwards;}
 
@keyframes hide-item{
  0%{
    opacity: 0;
    color: red;
  }
 
  50%{
    opacity: 0.5;
    color: saddlebrown;
  }
 
  100%{
    opacity: 1;
    color: yellow;
  }
}
 
@keyframes show-item{
  0%{
    opacity: 1;
    color:green;
  }
 
  50%{
    opacity: 0.5;
    color:greenyellow;
  }
 
  100%{
    opacity: 0;
    color: yellow;
  }
}

import {CSSTransition} from 'react-transition-group';  
 
render() { 
    return ( 
      <div>
        <CSSTransition
          in={this.state.isShow}
          timeout={2000}
          classNames="boss-text"
          unmountOnExit
        >
        {/ <div className={this.state.isShow?'show':'hide'}>大BOSS--孙悟空</div>