vue中使用@blur获取input val值

@blur="validScore($event)"

validScore(event){
    alert(event.target.value)
}

  <el-form-item label="身份证号码：" prop="idNumber">
       <el-input  @blur="onBsp($event)" v-model="laApplicationDetail.idNumber" placeholder="身份证号码"  maxlength="18" show-word-limit
                            style="width: 240px;" ></el-input >
  </el-form-item>

onBsp(event) {
        let queryParam = {
          name:event.target.form[0].value,
          idcard: event.target.value
        }
        getinformation(queryParam).then(res => {
          let list = res.data;
          this.laApplicationDetail.migrantworker = list.migrantworker;
          this.laApplicationDetail.phone = list.phone;
        }).catch(error => {
          this.$message({
            message: error.response.data.message ? error.response.data.message : '网络异常',
            type: 'warning'
          })
        });
      },