vue.js - Event from a child component isn't detected -


based on tree view sample (https://vuejs.org/v2/examples/tree-view.html) on vue , reorganize code followings: in parent component

<ul>       <item class="item" :model="treedata" v-on:changetype="changetypeevent"></item> </ul> ... <script>   ...     methods: {        changetypeevent: function () {        console.log('incoming event ' )     }  ... </script>

in child component,

<li>   <div :class="{bold: isfolder}" @click="toggle" @dblclick.once="changetype">         {{model.name}}     <span v-if="isfolder">[{{open ? '-' : '+'}}]</span>   </div>   <ul v-show="open" v-if="isfolder">     <item class="item" v-for="model in model.children" v-bind:key="model.name" :model="model">         </item>     <li class="add" @click="addchild">+</li>   </ul>   </li>   ... <script> export default {   name: 'item',   props: {     model: object   },   data: function () {     return {       open: false     }   },   computed: {     isfolder: function () {       return this.model.children &&        this.model.children.length     }   },   methods: {     toggle: function () {       if (this.isfolder) {         this.open = !this.open       }     },    changetype: function () {     if (!this.isfolder) {       console.log('double click ' + this.model.name)       this.$emit('changetype')     }   },  } } </script>

for reason, event not detected in parent component. have working code same structure. why doesn't work in case?

html attribute names case insensitive (https://www.w3.org/tr/2012/wd-html-markup-20120315/documents.html#case-insensitivity), therefore vue transforms event listener on parent pascal-case changetype kebab-case change-type template:

<ul>       <item class="item" :model="treedata" v-on:change-type="changetypeevent"></item> </ul>

vue documentation: https://vuejs.org/v2/guide/components.html#camelcase-vs-kebab-case


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