vue2.0 transition规范写法

html

 

  
    Toggle
  
  
    
hello
  

js

new Vue({
  el: '#demo',
  data: {
    show: true
  }
}) 

css

.fade-enter-active, .fade-leave-active {
  transition: opacity .5s
}
.fade-enter, .fade-leave-active {
  opacity: 0
}