前几天想了解vue如何写弹窗组件
有以下两种可取的写法:
1.状态管理 如果弹窗组件放在根组件,使用vuex来管理组件的show和hide。放在组件内,通过增加v-show或v-if来控制,可结合slot,定义不同需求的弹窗
2.事件管理 注册一个全局事件来打开弹窗,传入需展示的文字和相关的逻辑控制,可结合promise,实现异步
觉得对用像confirme和propmt这类弹窗,还是事件驱动的好。最好就是能使用promise回调。
于是手痒就写了一个。下面是代码。
propmt.js
import Vue from 'vue' import promptComponent from './prompt.vue' // 引入弹窗的vue文件 const promptConstructor = Vue.extend(promptComponent); // 注册组件 let instance = new promptConstructor().$mount(''); // 获得组件的实例 document.body.appendChild(instance.$el); // 将组件的element插入到body中 const Alert = (text,okText)=>{ if(instance.show === true) { //防止多次触发 return; } // 为弹窗数据赋值 instance.show = true; instance.isAlert = true; instance.okText = okText||'确定'; instance.message = text; //返回一个promise对象,并为按钮添加事件监听 return new Promise(function(resolve,reject) { instance.$refs.okBtn.addEventListener('click',function() { instance.show = false; resolve(true); }) }) }; const Confirm = (text,okText,cancelText)=>{ if(instance.show === true) { return; } instance.show = true; instance.okText = okText||'确定'; instance.cancelText = cancelText||'取消'; instance.message = text; return new Promise(function(resolve,reject) { instance.$refs.cancelBtn.addEventListener('click',function() { instance.show = false; resolve(false); }); instance.$refs.okBtn.addEventListener('click',function() { instance.show = false; resolve(true); }) }) }; const Prompt = (text,okText,inputType, defaultValue)=>{ if(instance.show === true) { return; } instance.show = true; instance.isPrompt = true; instance.okText = okText||'确定'; instance.message = text; instance.inputType = inputType || 'text'; instance.inputValue = defaultValue || ''; return new Promise(function(resolve,reject) { instance.$refs.okBtn.addEventListener('click',function() { instance.show = false; resolve(instance.inputValue); }) }) }; export {Alert,Confirm,Prompt}
prompt.vue
<style lang="less" scoped> .confirm-enter-active { transition: all .2s; } .confirm-leave-active { transition: opacity .2s; } .confirm-leave-to { opacity: 0; } .confirm-enter { opacity: 0; } .confirm { position: relative; font-family: PingFangSC-Regular; font-size: 17px; -webkit-user-select: none; user-select: none; // 遮罩层样式 .masker { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, .4); -webkit-transition: opacity .1s linear; transition: opacity .1s linear; z-index: 100; } // 入库数据错误样式 .box { position: absolute; top: 50%; left: 50%; width: 72%; -webkit-transform: translate(-50%, -50%); transform: translate(-50%, -50%); text-align: center; border-radius: 12px; background-color: #fff; .message { height: 97px; line-height: 24px; font-family: PingFangSC-Regular; font-size: 17px; vertical-align: middle; color: #999; letter-spacing: -0.41px; p { margin: 20px auto 0 auto; vertical-align: middle; } &::after { content: ''; height: 100%; } } .prompt { margin: 20px 0; width: 100%; p { margin: 5px auto; font-size: 17px; line-height: 24px; } input { margin: 5px auto; border: 1px solid #333; border-radius: 6px; width: 100px; height: 30px; font-size: 14px; line-height: 20px; text-align: center; } } .button-group { a { width: calc(50% - 0.5px); text-align: center; font-size: 17px; line-height: 43px; color: blue; } .max-width { width: 100% !important;; } } } } </style> <template> <transition name="confirm"> <div class="confirm" v-show="show"> <div class="masker" @touchmove.prevent> <div class="box"> <div class="message" v-if="!isPrompt"> <p>{{message}}</p> </div> <div class="prompt" v-if="isPrompt"> <p>{{message}}</p> <input type="text" v-model="inputValue" v-if="inputType === 'text'" ref="inputEl"> <input type="tel" v-model.number="inputValue" @keydown="enterCheck" v-if="inputType === 'tel'" ref="inputEl"> </div> <div class="button-group clearfix bd-top"> <a class="bd-right fl" ref="cancelBtn" v-show="!isAlert && !isPrompt">{{cancelText}}</a> <a class="fr" ref="okBtn" :class="{'max-width': isAlert || isPrompt}">{{okText}}</a> </div> </div> </div> </div> </transition> </template> <script type="text/ecmascript-6"> import {mapState} from 'vuex' export default{ data() { return { show: false, message: '请输入提示语', okText: '确定', cancelText: '取消', isAlert: false, isPrompt: false, inputValue: '', inputType: '' } }, methods: { // 金额输入框校验 enterCheck(event) { // 只允许输入数字,删除键,11位数字 if (event.keyCode === 46 || event.keyCode === 8) { return; } if (event.keyCode < 47 || event.keyCode > 58 || event.keyCode === 190) { event.returnValue = false; } }, }, watch: { show(){ if (this.show) { this.$nextTick(() => { console.log(this.$refs.inputEl); console.log(this.inputType); this.$refs.inputEl.focus(); }); } } } } </script>
main.js
import {Alert,Prompt,Confirm} from '../lib/components/prompt/prompt.js' Vue.prototype.Alert = function(text,okText) { return Alert(text,okText) }; Vue.prototype.Confirm = function(text,okText,cancelText) { return Confirm(text,okText,cancelText) }; Vue.prototype.Prompt = function(text,okText,inputType, defaultValue) { return Prompt(text,okText,inputType, defaultValue) }; component.vue: inputName() { this.Prompt('请输入名称','确认','text').then(res =>{ // do something use res }); },
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