自定义指令文件

moneyFormat.js

 /*** v-money 金额千分位转换*/export default {inserted: inputFormatter({// 格式化函数formatter(num, util) {if(num == null || num == '' || num == 'undefined' || typeof(num) == 'undefined'){return ''}if(util == '万元' || util == '万'){return formatMoney(num,'wan');}else if(util == '元'){return formatMoney(num);}// num = num.toString()// let num1 = num.split(".")[0], num2 = num.split(".")[1];// let c = num1.toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,');// return num.toString().indexOf(".") !== -1 ? c + "." + num2 : c;},// 解析函数parser(val) {val = val.toString().replace(/,/g, "")console.log(val,'val')return parseFloat(val) //.replace(/0+$/,"");},isNumber: true})
}/*** 监听输入框 数值千位符* @param {*} param0 * @returns */
function inputFormatter({ formatter = (e) => e, parser = (e) => e, limit = (e) => e, watchInput = true, isNumber = false }){return (el, binding, vnode) => {console.log(vnode.elm.innerText,'vnode.elm.innerText')if(vnode.elm.innerText != '元' && vnode.elm.innerText != '万元' && vnode.elm.innerText != '万'){return}let watchVal = trueconst input = el.getElementsByClassName("el-input__inner")[0] //$(el).find(".el-input__inner")[0]// 获取记录光标位置let selectionSitelet getSelectionSite = (event) => {let oldVal = event.target.value || ''let selectionStart = event.target.selectionStartselectionSite = oldVal.length - selectionStart}// 点击、键盘事件更新光标位置el.addEventListener("click", getSelectionSite)el.addEventListener("keyup", getSelectionSite)//为input绑定值赋值const assignment = (val) => {vnode.componentInstance.$emit('input', parser(val))}// 更改显示的值const upShow = (val) => {console.log(val,'valvalval')vnode.context.$nextTick(() => {input.value = val})}// 监听绑定值变化vnode.componentInstance.$watch('value', val => {if (watchVal) { upShow(formatter(val, vnode.elm.innerText)) }}, { deep: true, immediate: true })// 数字格式化let toNumber = (val) => {val = val.toString().replace(/[^\d^\.^\-]+/g, "") // 第二步：把不是数字，不是小数点、-的过滤掉.replace(/^0+(\d)/, "$1") // 第三步：第一位0开头，0后面为数字，则过滤掉，取后面的数字.replace(/^\./, "0.") // 第四步：如果输入的第一位为小数点，则替换成 0. 实现自动补全.replace(".", "$#$").replace(/\./g, "").replace("$#$", ".") // 只保留第一个".", 清除多余的"."// .match(/^\d*(\.?\d{0,9})/g)[0] || ""; // 第五步：最终匹配得到结果 以数字开头，只有一个小数点，而且小数点后面只能有1到9位小数return val}// 处理最后一位非法字符const handlerIllegalStr = (str) => {while (!(/^[0-9]+.?[0-9]*/.test(str.charAt(str.length - 1))) && str) {str = str.substr(0, str.length - 1)}return str || ''}// 监听input事件，可添加操作el.addEventListener("input", (event) => {let selectionStart = input.selectionStartlet val = event.target.valueif (binding.modifiers.number || isNumber) {val = toNumber(val)}let inp = limit(val)console.log(inp,'inp')event.target.value = inp// if (binding.modifiers.watchInput || watchInput) {//     assignment(inp)//     upShow(formatter(parser(val)))// }// setTimeout(() => {//     if (selectionSite && input.value.length != selectionStart) {//         input.selectionStart = input.selectionEnd = input.value.length - selectionSite//     }// }, 0)})if (input) {// 失去焦点input.addEventListener("blur", (event) => {watchVal = truelet val = event.target.value;console.log(val,'失去焦点111')if(val == null || val == '' || val == 'undefined' || typeof(val) == 'undefined'){return ''}if (binding.modifiers.number || isNumber) {val = handlerIllegalStr(val)}// assignment(val)upShow(formatter(val, vnode.elm.innerText)) console.log(val,'失去焦点22')})// 获取焦点input.addEventListener("focus", (event) => {watchVal = falselet val = event.target.value;if(val == null || val == '' || val == 'undefined' || typeof(val) == 'undefined'){return ''}// val = delcommafy(val);// assignment(val)upShow(parser(val))console.log(parser(val),'获取焦点')})}}
} //去除千分位中的‘，’
function delcommafy(num){if (num) {num = num.toString()num = num.replace(/,/gi, '')num = num.replace(/[ ]/g, '') //去除空格return num}return num 
}/*** 金额千位符转换* @param {*}} val //金额* @param {*}} util //单位* @returns*/
function formatMoney(val, util) {if(!val) return val;// 保留小时位数var count = util=='wan' ? 6 : 2;let str = val.toString().split('.');let re = /\d{1,3}(?=(\d{3})+$)/g;let n1 = str[0].replace(re, "$&,");var zeroCount = str.length > 1 && str[1] ? str[1] : ''// 小数点后面金额位置var strLength = str.length > 1 && str[1] ? str[1].length : 0for (let i = 0; i < (count-strLength); i++) {zeroCount += '0'}return str.length > 1 && str[1] ? `${n1}.${zeroCount}` : `${n1}.${zeroCount}`;
}

暴露指令index文件

directiveIndex.vue

import money from './moneyFormat'const install = function(Vue) {Vue.directive('money', money)
}export default install

引入自定义指令

main.js

import directive from './directiveIndex'Vue.use(directive)

使用方式

<el-input v-model="money" placeholder="请输入金额" v-money><template slot="append" >元</template>
</el-input>

预览效果