Vue中mintui的field实现blur和focus事件的方法

<mt-field label="卡号" v-model="card.cardNo" @blur.native.capture="checkCard"></mt-field>

methods: {
 checkCard() {
 console.log('1111');
 }
} 

<mt-field label="卡号" v-model="card.cardNo" v-mintblur></mt-field>

Vue.directive('mintblur', { // 暂不使用directive实现blur事件了，使用@blur.native.capture="cardNoBlur"即可。
 inserted: function(el, pra, a) {
 let oInput = el.querySelector('input');
 console.log('oInput', oInput);
 oInput.onfocus = function() {
  // 创建focus的事件
 };
 oInput.onblur = function() {
  console.log('blu1r');
  this.$emit(pra.expression);
 };
 }
});

<mt-field label="卡号" v-model="card.cardNo" v-mintblur="myfunction"></mt-field>