vue中自定义事件如何传递参数？

Question

如代码所示，在子组件中定义和触发了select方法并将type参数传入，在父组件中引入子组件，并监听select事件结果报错：“Property or method "type" is not defined on the instance but referenced during render.” 是我传递参数的方法不对吗？//子组件<button type="button" name="button" class="all" v-bind:class="{'active':selectType===2}" v-on:click="select(2,$event)">      {{desc.all}}      <span class="count">{{ratings.length}}</span></button><script type="text/ecmascript-6">    methods:{      select:function (type,event) {        if (!event._constructed){          return;        }        this.$emit('select',type)      }</script>//父组件<rating-select v-bind="{ratings:food.ratings,selectType:selectType,onlyContent:onlyContent}"  v-on:select="updSelect(type)" v-on:toggleContent="toggleContent"  class="rating-select"></rating-select><script>    updSelect:function (type) {        this.selectType = type      }</script>

Answer 1

v-on:select="updSelect"