关于前端:正则校验金额-02位

 <el-form :rules="rules" :model="balanceRecharge" ref="form">        <el-form-item label="充值金额" prop="rechargeAmount">              <el-input placeholder="请输出金额" v-model="balanceRecharge.rechargeAmount">                   <template slot="append">元</template>               </el-input>         </el-form-item> </el-form>   export default {    data () {        // 金额验证        let validateAmount = (rule, value, callback) => {            if (value) {                // let reg = /^[1-9]*[1-9][0-9]*$/;                let reg = /^(([1-9]{1}\d*)|(0{1}))(\.\d{0,2})$/;                if (!reg.test(value)) {                    callback(new Error('请输出正确的金额!'));                } else {                    callback();                }            } else {                callback(new Error('请输出正确的金额!'));            }        };        return {            balanceRecharge: {                rechargeAmount: 0,            },            rules: {                rechargeAmount: [                    { validator: validateAmount, trigger: ['blur', 'change'], required: true }                ]            }        };    },