前言
在平时开发中,弹出层算是一个最罕用的组件了,尤其是后盾的表单页,详情页,用户端的各种确认都很适宜应用弹出层组件展现,然而个别组件库提供给咱们的个别还是组件的模式,或者是一个简略的服务。
组件模式的弹出层,在我看来应该是组件库提供给咱们二次封装用的,如果间接其实很不合乎直觉
- 写在页面构造里,然而却不是在页面构造中展现,放在那个地位都不适合只能放在最下边
- 一个页面如果只有一个弹出层还好保护,多几个先不说放在那里,光保护弹出层的展现暗藏变量都是件头大的事件
- 弹出层两头展现的如果是一个表单或者一个业务很重的页面,逻辑就会跟页面混在一起不好保护,如果抽离成组件,在后盾这种全是表格表单的时候,都抽离成组件太过麻烦
那么有没有更合乎思维的形式应用弹窗呢,嘿嘿还真有,那就是服务创立弹出层
服务式弹出层
等等!如果是服务创立弹出层每个ui组件库根本都提供了,为什么还要封装呢?因为组件库提供的服务个别都是用于简略的确认弹窗,如果是更重的表单弹窗就难以用组件库提供的服务创立了,咱们以ant-design-vue
的modal为例子看看。
<template>
<a-button @click="showConfirm">Confirm</a-button>
</template>
<script lang="ts">
import { ExclamationCircleOutlined } from '@ant-design/icons-vue';
import { createVNode, defineComponent } from 'vue';
import { Modal } from 'ant-design-vue';
export default defineComponent({
setup() {
const showConfirm = () => {
Modal.confirm({
title: 'Do you want to delete these items?',
icon: createVNode(ExclamationCircleOutlined),
content: 'When clicked the OK button, this dialog will be closed after 1 second',
onOk() {
return new Promise((resolve, reject) => {
setTimeout(Math.random() > 0.5 ? resolve : reject, 1000);
}).catch(() => console.log('Oops errors!')); },
// eslint-disable-next-line @typescript-eslint/no-empty-function
onCancel() {},
});
};
return { showConfirm, };
},
});
</script>
能够看到modal提供了属性content
,在文档里咱们能够看到他的类型是能够传vue组件,然而这样写是有弊病的,咱们无奈在content
中的组件敞开modal,想要在子组件敞开Modal须要把Modal自身传递给子组件,而后触发destroy();
。
显然modal中是一个表单和重业务的组件时,是很难反对咱们的工作的,一是没法简略间接的在子组件敞开弹出层,二是content
中的组件传递值给父组件应用也比拟麻烦。
用Promise来创立吧!
用promise
来创立,咱们通过在close时触发resolve,还能够通过resolve传值,来触发then,这样十分合乎逻辑和语意。
事不宜迟咱们以element-plus
的dialog
为例子,来看看如何用Promise
封装弹出层。
// useDialog.ts
import {
createApp,
createVNode,
defineComponent,
h,
ref,
onUnmounted,
} from "vue";
import { ElDialog } from "element-plus";
import type { App, Component, ComputedOptions, MethodOptions } from "vue";
//引入dialog的类型
import type { DialogProps } from "element-plus";
export type OverlayType = {
component: Component<any, any, any, ComputedOptions, MethodOptions>;
options?: Partial<DialogProps>;
params?: any;
};
export class OverlayService {
//overlay的vue实例
private OverlayInstance!: App;
// ui库的组件个别都带有动画成果,所以须要保护一个布尔值,来做展现暗藏
public show = ref<boolean>(false);
// 组件库的options
private options: Partial<DialogProps> = {};
//在open中传递给子组件的参数
private params: any = {};
//挂载的dom
public overlayElement!: Element | null;
//子组件
private childrenComponent!: Component<
any,
any,
any,
ComputedOptions,
MethodOptions
>;
//close触发的resolve,先由open创立赋予
private _resolve: (value?: unknown) => void = () => {};
private _reject: (reason?: any) => void = () => {};
constructor() {
this.overlayElement = document.createElement("div");
document.body.appendChild(this.overlayElement);
onUnmounted(() => {
//来到页面时卸载overlay vue实例
this.OverlayInstance?.unmount();
if (this.overlayElement?.parentNode) {
this.overlayElement.parentNode.removeChild(this.overlayElement);
}
this.overlayElement = null;
});
}
private createdOverlay() {
const vm = defineComponent(() => {
return () =>
h(
ElDialog,
{
//默认在弹窗敞开时销毁子组件
destroyOnClose: true,
...this.options,
modelValue: this.show.value,
onClose: this.close.bind(this),
},
{
default: () =>
createVNode(this.childrenComponent, {
close: this.close.bind(this),
params: this.params,
}),
}
);
});
if (this.overlayElement) {
this.OverlayInstance = createApp(vm);
this.OverlayInstance.mount(this.overlayElement);
}
}
//关上弹窗的办法 返回promsie
public open(overlay: OverlayType) {
const { component, params, options } = overlay;
this.childrenComponent = component;
this.params = params;
if (options) {
this.options = options;
}
return new Promise((resolve, reject) => {
this._resolve = resolve;
this._reject = reject;
//判断是否有overlay 实例
if (!this.OverlayInstance) {
this.createdOverlay();
}
this.show.value = true;
});
}
//弹窗的敞开办法,能够传参触发open的promise下一步
public close(msg?: any) {
if (!this.overlayElement) return;
this.show.value = false;
if (msg) {
this._resolve(msg);
} else {
this._resolve();
}
}
}
//创立一个hooks 好在setup中应用
export const useDialog = () => {
const overlayService = new OverlayService();
return {
open: overlayService.open.bind(overlayService),
close: overlayService.close.bind(overlayService),
};
};
封装好dialog服务之后,当初咱们先创立一个子组件,传递给open的子组件会承受到close,params两个props
<!--ChildDemo.vue -->
<template>
<div>
{{params}}
<button @click="close('敞开了弹窗')" >敞开弹窗</button>
</div>
</template>
<script lang="ts" setup>
const props = defineProps<{
close: (msg?: any) => void;
params: any;
}>();
</script>
而后咱们在页面应用open
<template>
<div>
<button @click="openDemo" >关上弹窗</button>
</div>
</template>
<script lang="ts" setup>
import ChildDemo from './ChildDemo.vue'
import { useDialog } from "./useDialog";
const { open } = useDialog();
const openDemo = () => {
open({
component: ChildDemo,
options: { title: "弹窗demo" },
params:{abc:'1'}
}).then((msg)=>{
console.log('敞开弹窗触发',msg)
});
};
</script>
好了到此咱们就封装了一个简略实用的弹窗服务。
写在后头
其实这样封装的还是有一个小问题,那就是没法拿到vue实例,只能拿到overlay的实例,因为overlay是从新创立的vue实例,所以不要应用全局注册的组件,在子组件上独自引入,pinia
,vuex
,router
这些当params
做传入子组件。
如果不想本人封装,能够用我写的库vdi useOverlay hook搭配任意的ui组件库,vdi还提供了更好的依赖注入
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