1、前端页面

<el-row :gutter="20">
  <el-col :span="20">
    <el-form-item label="数量" prop="quantity">
      <el-input
            class="entity"
            placeholder="请输入数量"
            v-model="ruleForm.quantity"
            size="mini"
            clearable>
        <span slot="suffix" style="padding: 0 5px">个</span>
      </el-input>
    </el-form-item>
  </el-col>
</el-row>

2、规则验证

export default {
  data() {
    return {
      ruleForm: {
        quantity: "",
      },
      rules: {
        quantity: [{
          pattern: /^(([1-9]{1}\d*)|(0{1}))(\.\d{1,2})?$/,
          required: true,
          message: '请输入数量，且为正整数类型',
          trigger: 'blur'
        }, ],
      },
    };
  },

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