vue 路由过渡效果(1)

1.html界面

<transition name="slide">
      <router-view></router-view>
</transition>

2.css

.slide-enter-active, .slide-leave-active {
  transition: opacity .8s;
}
.slide-enter, .slide-leave-to /* .fade-leave-active below version 2.1.8 */ {
  opacity: ;
}

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vue的组件props传参可以是空值，不传。只要在props里面写

 props: {

        ***变量 : {

            type: Boolean,

            default: false

        }

    },

即使引用它的父组件不传值，也能获取default值，不报错