入口页 index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>数字输入框组件</title> </head> <body> <div> <input-number v-model="value" :max="10" :min="0"></input-number> </div> <script src="https://unpkg.com/vue/dist/vue.js"></script> <script src="https://www.jb51.net/input-number.js"></script> <script src="https://www.jb51.net/index.js"></script> </body> </html>
数字输入框组件 input-number.js
function isValueNumber(value) { return (/(^-?[0-9]+\.{1}\d+$) | (^-?[1-9][0-9]*$) | (^-?0{1}$)/).test(value + ''); } Vue.component('input-number',{ template: '\ <div>\ <input \ type="text"\ :value="currentValue"\ @change="handleChange">\ <button \ @click="handleDown"\ :disabled="currentValue <= min">-</button>\ <button \ @click="handleUp"\ :disabled="currentValue >= max">+</button>\ </div>', props: { max: { type: Number, default: Infinity }, min: { type: Number, default: -Infinity }, value: { type: Number, default: 0 } }, data: function () { return { currentValue: this.value } }, watch: { currentValue: function (val) { this.$emit('input', val); this.$emit('on-change',val); }, value: function (val) { this.updateValue(val); } }, methods: { updateValue: function (val) { if(val > this.max) val = this.max; if(val < this.min) val = this.min; this.currentValue = val; }, handleDown: function () { if(this.currentVaule <= this.min) return; this.currentValue -= 1; }, handleUp: function () { if(this.currentVaule >= this.max) return; this.currentValue += 1; }, handleChange: function (event) { var val = event.target.value.trim(); var max = this.max; var min = this.min; if(isValueNumber(val)){ val = Number(val); this.currentValue = val; if(val > max){ this.currentValue = max; }else if(val < min){ this.currentValue = min; } }else{ event.target.value = this.currentValue; } } }, mounted: function () { this.updateValue(this.value); } });
根实例
var app = new Vue({ el: '#app', data: { value: 5 } });