vue 自定义指令 input限制输入金额

html 部分

<el-input v-enter-money v-model="money"></el-input>

js 部分

import Vue from "vue";Vue.directive("enterMoney", {// 自定义指令名字 v-enter-moneybind: function(el, {value = 2 }) {el = el.nodeName == "INPUT" ? el : el.children[0];let RegStr =value == 0? `^[\\+\\-]?\\d+\\d{0,0}`: `^[\\+\\-]?\\d+\\.?\\d{0,${value}}`;el.addEventListener("keyup", function() {el.value = el.value.match(new RegExp(RegStr, "g"));el.dispatchEvent(new Event("input"));});}});