vue限制输入框最多只能输入小数点后两位

---

<el-input v-model="amMerchant.rate"  type="number"  @input.native="changeRate($event,amMerchant.rate)"> </el-input>

methods:{
    
    
       changeRate(e,input){
    
    
                e.target.value=(e.target.value.match(/^\d*(\.?\d{0,2})/g)[0]) || null
                this.input=e.target.value
                this.amMerchant.rate=this.input
            },
}