vue实现可视化可拖放的自定义表单的示例代码

export default Vue.component('CustomTemplate', {
  props: {
    html: String
  },
  render (h) {
   return h(Vue.extend({ // 关键点
     template: `<div class="root-custom-template">${this.html}</div>`,
     data () {
      return {
       current: ''
      }
     },
     methods: {
      doclick (uuid, id) {
       this.current = uuid
       this.$store.commit('EditPanel/changeId', uuid)
      },
      dodragstart (ev) {
       ev.dropEffect = 'move'
      }
     }
  }))
 },
})

computed: {
  myList: {
    get() {
      return this.$store.state.myList
    },
    set(value) {
      this.$store.commit('updateList', value)
    }
  }
}

var a = { k: 1 }
var b = a
b.k = 2
console.log(a) // { k: 2 }

function deepFreeze(obj) {

 // 取回定义在obj上的属性名
 var propNames = Object.getOwnPropertyNames(obj);

 // 在冻结自身之前冻结属性
 propNames.forEach(function(name) {
  var prop = obj[name];

  // 如果prop是个对象，冻结它
  if (typeof prop == 'object' && prop !== null)
   deepFreeze(prop);
 });

 // 冻结自身(no-op if already frozen)
 return Object.freeze(obj);
}