vue中elementUI价格校验及正则

<el-form
            ref="add"
            :rules="rules"
            :model="add"
            label-width="110px"
        >
         <el-form-item label="价格：" v-if="add.serviceType!=3" prop="amount">
                <input type="text" style="width: 50%" autocomplete="off" placeholder="请输入" v-model="add.amount" class="el-input__inner m_r_20">元
            </el-form-item>
</el-form>

 rules: {
          amount: [
            {required: true, message: "请输入", trigger: "blur,change"},
            { min: 1, max: 6, message: '长度在 1 到 6 个字符', trigger: 'blur,change' },
            { validator: twoPoint, message: '最多包含两位小数的正数且不能为以0开头的正整数', trigger: 'blur' }
          ],
         
        },








const twoPoint = (rule, value, callback) => {
         if(/^\d+\.?\d{0,2}$/.test(value)){
            if(value.indexOf('.')=='-1'&&value.length>1&&value.slice(0,1)=='0'){
              callback(new Error("最多包含两位小数的正数且不能为以0开头的正整数"));
            }
          }else{
            callback(new Error("最多包含两位小数的正数且不能为以0开头的正整数"));
          }


        // if (/^(?!0+(?:\.0+)?$)(?:[1-9]\d*|0)(?:\.\d{1,2})?$/.test(value)) {
        //     callback()
        // } else {
        //     callback(new Error('最多包含两位小数的正数'))
        // }
      }