import Vue from 'vue'
export default {
 install: (Vue, options) => {
 Vue.directive('validateParams', {
  inserted: function (el, binding, vNode) {
  /*
  * 解決辦法只需添加下面這一行代碼即可
  * el即為當(dāng)前指令綁定的元素，classList.add可以給元素添加類名
  */
  el.classList.add('v-check');
  el.addEventListener('blur', function (event) {
   // ...
  })
  }
 });
 }
}

// mixin.ts
import { Component, Vue } from 'vue-property-decorator';
@Component({})
export class Demo extends Vue {
 public A: string = 'A';
 public doSomething () {
 }
}
// component
<template>
</template>
<script lang="ts">
import { Component, Vue, Mixins } from 'vue-property-decorator';
import { Demo } from 'mixin.ts';
@Component({})
export class App extends Mixins(Demo) {
 private created() {
 console.log(this.A); // 會(huì)打印出A
 }
}
</script>

@Component({})
export class ValidatorMixin extends Vue {
 /*
 * 定義一個(gè)GValidate方法，可以接受一個(gè)元素節(jié)點(diǎn)參數(shù)
 * 參數(shù)定義了表單函數(shù)校驗(yàn)的范圍
 */
 public GValidate(validateEl?: HTMLElement) {
 // 默認(rèn)是查找當(dāng)前組件實(shí)例內(nèi)的.v-check元素，this.$el表示當(dāng)前組件
 let elements = this.$el.querySelectorAll('.v-check');
 if ( validateEl ) {
  // 有參數(shù)時(shí)，規(guī)定了校驗(yàn)的范圍
  elements = validateEl.querySelectorAll('.v-check');
 }
 const evObj = document.createEvent('Event');
 evObj.initEvent('blur', true, true);
 if (elements) {
  for (const element of elements) {
  element.dispatchEvent(evObj);
  }
 }
 // 還是查找.input-error元素，以此來(lái)判斷檢驗(yàn)結(jié)果
 let errorInputs = this.$el.querySelectorAll('.input-error');
 if (validateEl) {
  errorInputs = validateEl.querySelectorAll('.input-error');
 }
 // 將校驗(yàn)的結(jié)果返回
 if (errorInputs.length !== 0) {
  return false;
 } else {
  return true;
 }
 }
}

// rules.ts
export const required = (message) => ({
 message,
 required: true
});
export const min = (message, length=3) => ({
 message,
 min: length
})
export const max = (message, length=15) => ({
 message,
 max: length
})
export const pattern = (message, reg) => ({
 message,
 pattern: reg
})
// form.vue
<template>
 <div>
 <div class="form-item" ref="userName">
  <label for="userEmail">用戶名：</label>
  <input id="userEmail" type="text" v-model="userName"
  v-validateParams="[inputNameRequired, inputNameMin, inputNameMax, inputNamePattern]">
 </div>
 <button class="btn" type="success" @click="submit">確認(rèn)</button>
 </div>
</template>
<script lang='ts'>
import { Component, Vue, Prop, Mixins } from 'vue-property-decorator';
import { max, min, required, name, pattern} from 'rules';
import { yourMixin } from 'yourMixin.ts';
@Component({})
export default class Auth Mixins(youMixin) {
 private userName: string = '';
 private inputNameMax = max('請(qǐng)不要超過(guò)20個(gè)字符');
 private inputNameMin = min('請(qǐng)不要小于3個(gè)字符');
 private inputNameRequired = required('請(qǐng)輸入用戶名');
 private inputNamePattern = pattern('請(qǐng)輸入符合要求的用戶名', /^[a-zA-Z0-9_-]{4,16}$/);
 private submit() {
 const validRes = this.GValidate(); // 全局校驗(yàn)
 const userNameValidRes = this.GValidate(this.$refs.userName); // 單獨(dú)校驗(yàn)?zāi)硞€(gè)表單
 if (validRes && userNameValidRes) {
  alert('通過(guò)校驗(yàn)');
 } else {
  alert('校驗(yàn)失敗');
 }
 }
}
</script>