芜湖网站建设兼职如何做市场调研和分析

问题

开发的时候经常会遇到需要在输入框中输入数字转为千分位，点击填写时又转为数字的情况

解决

因此直接在vue中注入自定义指令，通过使用自定义指令达到效果；限制input输入框只能输入数字和一位小鼠带你

自定义指令-千分位

// 自定义指令-千分位
Vue.directive("thousand", {inserted(el, binding, vnode) {// console.log("el", el, binding, vnode);// 获取input节点if (el.tagName.toLocaleUpperCase() !== "INPUT") {el = el.getElementsByTagName("input")[0];}if (!el || !el.value) return;// 初始化时，格式化值为千分位const numberValue = parseFloat(el.value.replace(/,/g, ""));if (!isNaN(numberValue)) {el.value = numberValue.toLocaleString("zh", {minimumFractionDigits: 2,maximumFractionDigits: 2,});}// 聚焦时转化为数字格式（去除千分位）el.onfocus = () => {el.value = parseFloat(el.value.replace(/,/g, "")).toFixed(2);};// 失去焦点时转化为千分位el.onblur = () => {console.log('aaa',el.value)const onBlurValue = parseFloat(el.value.replace(/,/g, ""));if (!isNaN(onBlurValue)) {el.value = onBlurValue.toLocaleString("zh", {minimumFractionDigits: 2,maximumFractionDigits: 2,});}};},
});

限制el-input只能输入，并且加上千分位指令

   <el-inputv-thousandv-model="daily_limit"maxlength="10"type="text"@keypress="restrictInput"@blur="formatOnBlur"></el-input><script>
export default {data(){retrun {daily_limit:''}},
methods：{restrictInput(event) {const key = event.key;const value = String(this.daily_limit || "");if (event.ctrlKey || event.altKey || key.length > 1) return;// 只允许数字和小数点，限制多个小数点const isValidKey = /[0-9.]/.test(key);const hasDecimal = value.includes(".");if (!isValidKey || (key === "." && hasDecimal)) {event.preventDefault();return;}},formatOnBlur(formKey) {const strValue = String(this.formVal[formKey] || "");if (strValue && !isNaN(Number(strValue))) {this.formVal[formKey] = Number(strValue).toFixed(2);}},}
}
</script>