正则匹配输入框保留两位小数限制最多位数

<template>
  <div class="hello">

    <el-form :model="ruleForm" :rules="ruleValidate">

      <el-form-item prop="number">
          <el-input labe="输入数字" v-model="ruleForm.number" placeholder="请输入数字" ></el-input>
      </el-form-item>

    </el-form>

    <h1>{{ msg }}</h1>
    
  </div>
</template>

<script>
export default {
  name: 'HelloWorld',
  data () {
    let checkPrice = (rule,value,callback)=>{
        if(value){
          // let rgx = /^\d+(\.\d{1,2})?$/;
          let rgx = /^[1-9]{1}\d{0,16}(\.\d{1,2})?$|^0(\.\d{1,2})?$/;
          if(value.match(rgx)==null){
            return callback(new Error('请检查输入格式，不能为空，且最多2位小数'))
          }else{
            callback();
          }
        }
      };
    return {
      msg: 'Welcome to Your Vue.js App',
      ruleForm:{
        number:''
      },
      ruleValidate:{
        number:[
          { required: true, message: '请输入数字', trigger: 'change' },
          { validator:checkPrice,trigger:'change'}
        ]
      }
    }
  }
}
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
h1, h2 {
  font-weight: normal;
}
ul {
  list-style-type: none;
  padding: 0;
}
li {
  display: inline-block;
  margin: 0 10px;
}
a {
  color: #42b983;
}
</style>