传参-子传父

 

 

 效果：

 

 

const App = props => {
  let alerts = () => {
    props.alertSs(props.time)
  }
  let is = {color:props.color? "red" : "blue"}
  return <div onClick={alerts} style={is}>{props.time},</div>;
}
let Apps = ()=>{
  let alertSs = (time) => {
    alert(time)
  }
  return <div>
    {arrTime.map(item => <App alertSs={alertSs} key={item.time} time={item.time} color={item.color} />)}
  </div>
}