方法一、input 事件 + 数字正则表达式
<template><a-input v-model:value="num" @input="handInput" /></template><script lang="ts">import { defineComponent, ref } from "vue";export default defineComponent({name: "OnlyNum",props: {},emits: [],setup() {const num = ref("");function handInput(e) {num.value = e.target.value.replace(/[^0-9]/g, "");}return { num, handInput };},});</script><style scoped></style>
方法二、键盘按键事件 keydown
<template><a-input v-model:value="num" @keydown="handKeydown" /></template><script lang="ts">import { defineComponent, ref } from "vue";export default defineComponent({name: "OnlyNum",props: {},emits: [],setup() {const num = ref("");function handKeydown(e) {let _code = e.keyCode;// 只允许数字键和删除键if ((_code >= 48 && _code <= 57) || _code === 8) {} else {e.preventDefault();}}return { num, handKeydown };},});</script><style scoped></style>
