孙title this.$emit(‘事件名’，要传递的值)

// titlemethods: {change(e) {console.log(e, 'e');this.$emit("sValue", this.sValue, this.options[0].label)}}

父 box v-bind=“$attrs"v-on="$listeners”

<div class="box-wrap"><Title v-bind="$attrs" v-on="$listeners"></Title><div class="box"><slot></slot></div></div>

爷 index

<Box @sValue="sValue"></Box>

   sValue(e, e1) {console.log(e, e1, 'eee');}