二次封装 el-dialog 组件：打造更灵活的对话框解决方案

文章目录

引言
- 为什么需要二次封装？
- 封装思路
- 代码实现
- - 1. 基础封装组件 (Dialog.vue)
  - 2. Vue中引入使用示例
- 封装后的优势
- 进阶优化建议
总结

引言

在 Vue 项目中，Element UI 的 el-dialog 是一个非常实用的对话框组件。但在实际开发中，我们经常会遇到需要重复设置对话框属性、处理相同逻辑的情况。通过二次封装，我们可以创建一个更灵活、更易用的对话框组件，提高开发效率并保持代码一致性。

为什么需要二次封装？

减少重复代码：多个对话框可能需要相同的逻辑（如关闭确认、表单重置等）
统一风格：确保所有对话框的视觉和交互行为一致
简化使用：通过默认值和封装方法，减少每次使用时需要编写的代码
增强功能：添加常用功能如加载状态、国际化支持等

封装思路

我们将创建一个 Dialog 组件，它封装了那些扩展？：

封装了 el-dialog 的常用属性和事件
动态按钮大小，按钮标题动态展示，按钮的type类型
弹窗的动态宽度
是否显示关闭，取消按钮
添加了确认关闭逻辑
支持插槽内容（内容根据项目随意调整）
提供统一的关闭方法
批量按钮的动态添加
窗口的响应式

代码实现

1. 基础封装组件 (Dialog.vue)

<template><div><el-dialogclass="cust-dialog":model-value="show":title="title":width="dialogWidth":top="top + 'px'"@close="close":draggable="true":show-close="showClose":modal-class="'dialog-fade'"><divclass="dialog-body"><slot></slot></div><template #footer><span class="dialog-footer"><slot name="footer"><!-- 默认footer内容 --><el-button type="danger" @click="close" v-if="showCancel">取消</el-button><el-buttonv-for="item in buttons"@click="item.click":type="item.type || primary":size="item.size">{{ item.text }}</el-button></slot></span></template></el-dialog></div>
</template><script setup lang="ts">
import { computed, watch, onMounted, onUnmounted, ref } from "vue";
const props = defineProps<{show: { type: Boolean; default: false };title: { type: String; default: "提示" };width: { type: String; default: "30%" };top: { type: Number; default: 50 };padding: { type: Number; default: 15 };showClose: { type: Boolean; default: true };showCancel: { type: Boolean; default: true };buttons: {type: Array<{text: string;click: () => void;type?: "primary" | "success" | "warning" | "danger" | "info";size?: "large" | "small" | "default";}>;default: () => [];};
}>();const dialogWidth = ref(props.width);
// 监听窗口大小变化，根据窗口宽度动态设置dialog宽度
onMounted(() => {const handleResize = () => {if (window.innerWidth <= 768) {dialogWidth.value = "50%";} else {dialogWidth.value = props.width;}};window.addEventListener("resize", handleResize);
});onUnmounted(() => {window.removeEventListener("resize", handleResize);
});const emit = defineEmits(["close"]);
const close = () => {emit("close");
};
</script><style lang="scss">
@keyframes fade {from {opacity: 0;}to {opacity: 1;}
}.dialog-fade {animation: fade 0.3s;
}.cust-dialog {margin: 30px auto 10px !important;.el-dialog__body {padding: 0px;}.dialog-body {border-top: 1px solid #ddd;border-bottom: 1px solid #ddd;min-height: 80px;overflow: auto;/* 自定义滚动条 */&::-webkit-scrollbar {width: 3px;height: 8px;}&::-webkit-scrollbar-track {background: #f1f1f1;border-radius: 4px;}&::-webkit-scrollbar-thumb {background: #c1c1c1;border-radius: 4px;transition: background 0.3s;&:hover {background: #a8a8a8;}}}.dialog-footer {text-align: right;padding: 5px 20px;}
}
</style>

2. Vue中引入使用示例

<template><div><Dialog:show="dialogConfig.show":title="dialogConfig.title":width="dialogConfig.width":top="dialogConfig.top":padding="dialogConfig.padding":showClose="dialogConfig.showClose":showCancel="dialogConfig.showCancel":buttons="dialogConfig.buttons"@close="dialogConfig.show = false"><el-form :model="form" label-width="auto" style="max-width: 600px"><el-form-item label="Activity name"><el-input v-model="form.name" /></el-form-item><el-form-item label="Activity zone"><el-selectv-model="form.region"placeholder="please select your zone"><el-option label="Zone one" value="shanghai" /><el-option label="Zone two" value="beijing" /></el-select></el-form-item><el-form-item label="Activity time"><el-col :span="11"><el-date-pickerv-model="form.date1"type="date"placeholder="Pick a date"style="width: 100%"/></el-col><el-col :span="2" class="text-center"><span class="text-gray-500">-</span></el-col><el-col :span="11"><el-time-pickerv-model="form.date2"placeholder="Pick a time"style="width: 100%"/></el-col></el-form-item><el-form-item label="Instant delivery"><el-switch v-model="form.delivery" /></el-form-item><el-form-item label="Activity type"><el-checkbox-group v-model="form.type"><el-checkbox value="Online activities" name="type">Online activities</el-checkbox><el-checkbox value="Promotion activities" name="type">Promotion activities</el-checkbox><el-checkbox value="Offline activities" name="type">Offline activities</el-checkbox><el-checkbox value="Simple brand exposure" name="type">Simple brand exposure</el-checkbox></el-checkbox-group></el-form-item><el-form-item label="Resources"><el-radio-group v-model="form.resource"><el-radio value="Sponsor">Sponsor</el-radio><el-radio value="Venue">Venue</el-radio></el-radio-group></el-form-item><el-form-item label="Activity form"><el-input v-model="form.desc" type="textarea" /></el-form-item><el-form-item><el-button type="primary" @click="onSubmit">Create</el-button><el-button>Cancel</el-button></el-form-item></el-form></Dialog><el-button type="primary" @click="showDialog">点击</el-button></div>
</template><script setup lang="ts">
import Dialog from "@/components/Dialog.vue";
import { ref, reactive } from "vue";
const dialogConfig = ref({show: false, // 控制弹窗显示title: "测试弹窗", // 标题width: "80%", // 宽度top: 50, // 距离顶部高度padding: 15, // 内容内边距showClose: true, // 是否显示关闭按钮showCancel: true, // 是否显示取消按钮buttons: [{text: "确定",click: () => console.log("确定"),type: "success",size: "default",},],
});const showDialog = () => {dialogConfig.value.show = true;
};const form = reactive({name: "",region: "",date1: "",date2: "",delivery: false,type: [],resource: "",desc: "",
});const onSubmit = () => {console.log("submit!");
};
</script><style lang="scss" scoped></style>