vue组件开发原理与实现方法详解

<template>
 <div >
   <div v-if="right=='r'" class="readOnlyBgColor">{{value}}</div>
   <div class="box-custom-component" v-else-if="right=='w'">
       <input 
         type="text"  
         @blur="blurHandler" 
         @focus="focusHandler" 
         :required="required" 
         v-model="currentValue" 
         :placeholder="placeholder"
       ></input>
        <a href="javascript:;" rel="external nofollow" class="yd-input-clear" tabindex="-1" @click="clearInput" v-show="showClear && !isempty"></a>
   </div>
 </div>
</template>
<script type="text/ecmascript-6">
import { calcRight } from "@/assets/app.js";
import {VTypes,RxUtil} from "@/assets/util.js";
export default{
  name : "rx-input",
  props: {
    value:[String,Number],
    permission:Object,
    permissionkey:String,
    showClear:{
      type: Boolean,
    default: true
    },
    readonly: {
    type: Boolean,
    default: false
   },
   placeholder:{
    type: String,
    default: ""
   },
      required: {
    type: Boolean,
    default: false
    },
    /**
     * 验证表达式
     */
    vtype:{
      type: String,
    default: ""
    },
    onblur:Function,
    onfocus:Function,
    conf:Object
  },
  data(){
    return {
      currentValue: this.value,
      iserror:false,
      isempty:true,
      checkReq:true
    }
  },
  computed: {
    right :function () {
        return calcRight(this);  
    }
  },
  mounted(){
      this.valid(this.required);
  },
  methods: {
      valid(chkReq_) {
        var val=this.currentValue;
        if(chkReq_ && this.required){
          if(RxUtil.isEmpty(val)){
//            this.iserror=true;
            return false;
          }
        }
        if(!this.vtype) {
//          this.iserror=false;
          return true;
        } 
        var validFunc=VTypes[this.vtype];
        if(typeof validFunc=="undefined") {
//          this.iserror=false;
          return true;
        }
        //验证
        var rtn= validFunc.valid(val);
//        this.iserror=!rtn;
        return rtn; 
      },
      blurHandler(e) {
//        this.iserror=!this.valid(this.checkReq);
        this.onblur && this.onblur(e);
      },
      focusHandler(e) {
    this.showClear = true;
    this.onfocus && this.onfocus(e);
    },
    clearInput(){
      this.currentValue = '';
      if(this.required){
//       this.iserror=true; 
      }
    }
    },
  watch: {
    currentValue: function (val, oldVal){
        this.$emit('input', this.currentValue);
        //是否为空
        this.isempty=RxUtil.isEmpty(val);
      },
      value :function(val,oldVal){
        if(val!=oldVal){
          this.currentValue=this.value;
        }
      }
  }
}
</script>
<style scoped>
.box-custom-component::after{
  content: '';
  display: block;
  clear: both;
}
.box-custom-component input{
  float: left;
  width:calc(100% - .65rem);
}
.box-custom-component a{
  float: left;
  width: .65rem;
}
</style>

import RxInput from '@/components/common/form/RxInput';

Vue.component(RxInput.name, RxInput);

<rx-input v-model="data.email" permissionkey="email" :required="true" vtype="email" :readonly="false" :permission="" ></rx-input>

<div v-if="right=='r'" class="readOnlyBgColor">{{value}}</div>

this.$emit('input', this.currentValue);