vue 中移入移出 切换背景色

  <button class="btn1" @mouseover="addActive($event)" @mouseout="removeActive($event)">

注意：要写两套样式 btn1 和 btn11

methods:{
    
    
      addActive($event) {
    
    
      $event.currentTarget.className = 'btn1'
    },
      removeActive($event) {
    
    
      $event.currentTarget.className = 'btn11'
    },
}