react 页签(自行封装)

思路：封装一个页签组件，包裹页面组件，页面渲染之后把数据缓存到全局状态实现页面缓存。

浏览本博客之前先看一下我的博客实现的功能是否满足需求，实现功能：

- 页面缓存
- 关闭当前页
- 鼠标右键>关闭当前
- 鼠标右键>关闭其他
- 鼠标右键>关闭左侧
- 鼠标右键>关闭右侧
- 鼠标右键>全部关闭(默认跳转到首页)

如果您需要实现刷新页签功能，建议react umi/max 页签(react-activation)-CSDN博客

1. models/tabs

// 全局共享数据示例
import { useState } from 'react';const useUser = () => {const [items, setItems] = useState<any[]>([]);  // 页签的全局Item数据const [key, setKey] = useState<string>('/home');  // 页签的高亮Keyreturn {items,setItems,key,setKey,};
};export default useUser;

2. components/PageHeadTabs

import { Home } from '@/pages/Home';
import { useLocation, useModel, useRouteProps } from '@umijs/max';
import { Dropdown, Tabs } from 'antd';
import { useEffect } from 'react';type PageHeadTabsProps = {children: any;
};const PageHeadTabs = (props: PageHeadTabsProps) => {const { name } = useRouteProps(); //获取当前路由名称const { children } = props; // Props获取元素、页面名称const { items, setItems, key, setKey } = useModel('tabs'); // 获取全局Item和Keyconst { pathname } = useLocation(); // 获取当前页的Pathname// 页签点击事件const onTabClick = (value: any) => {setKey(value); // 设置高亮的Keyhistory.replaceState(null, '', value); // 拼接URL路径、但不执行跳转};// 关闭页签const onEdit = (targetKey: any, action: 'add' | 'remove') => {if (action === 'remove') {let newActiveKey = key;const lastIndex = items.findIndex((item) => item.key === targetKey);const newPanes = items.filter((item) => item.key !== targetKey);if (newPanes.length && newActiveKey === targetKey) {if (lastIndex - 1 >= 0) {newActiveKey = newPanes[lastIndex - 1].key;} else {newActiveKey = newPanes[0].key;}}setItems(newPanes);setKey(newActiveKey);history.replaceState(null, '', newActiveKey);}};// 关闭当前页const onCurrent = (e: any) => {e.domEvent.stopPropagation();let targetKey = JSON.parse(e?.key).name;let newActiveKey = key;const lastIndex = items.findIndex((item) => item.key === targetKey);const newPanes = items.filter((item) => item.key !== targetKey);if (newPanes.length && newActiveKey === targetKey) {if (lastIndex - 1 >= 0) {newActiveKey = newPanes[lastIndex - 1].key;} else {newActiveKey = newPanes[0].key;}}setItems(newPanes);setKey(newActiveKey);history.replaceState(null, '', newActiveKey);};// 关闭其他const onOther = (e: any) => {e.domEvent.stopPropagation();let targetKey = JSON.parse(e?.key).name;const newPanes = items.filter((item) => item.key === targetKey || item.key === '/home',);setItems(newPanes);setKey(targetKey);history.replaceState(null, '', targetKey);};//关闭左侧const onLeft = (e: any) => {e.domEvent.stopPropagation();let targetKey = JSON.parse(e?.key).name;const lastIndex = items.findIndex((item) => item.key === targetKey);const newPanes = items.splice(0, lastIndex + 1).filter((item) => item.key === targetKey || item.key === '/home');const oldIndex = newPanes.findIndex((item) => item.key === key);setItems(newPanes);if (oldIndex) {setKey(targetKey);history.replaceState(null, '', targetKey);}};// 关闭右侧const onRight = (e: any) => {e.domEvent.stopPropagation();let targetKey = JSON.parse(e?.key).name;const lastIndex = items.findIndex((item) => item.key === targetKey);const newPanes = items.splice(0, lastIndex + 1);const oldIndex = newPanes.findIndex((item) => item.key === key);setItems(newPanes);if (oldIndex) {setKey(targetKey);history.replaceState(null, '', targetKey);}};// 关闭全部const onAll = (e: any) => {e.domEvent.stopPropagation();const newPanes = items.splice(0, 1);setItems(newPanes);setKey('/home');history.replaceState(null, '', '/home');};const labelDropdown = (name: string, label: string) => {const lastIndex = items.findIndex((item) => item.key === name);return (<Dropdownmenu={{items: [{label: '关闭当前',key: JSON.stringify({ name, key: 'current' }),disabled: name === '/home',onClick: onCurrent,},{label: '关闭其他',key: JSON.stringify({ name, key: 'other' }),disabled:(name === '/home' && items.length <= 1) ||(name !== '/home' && items.length <= 2),onClick: onOther,},{label: '关闭左侧',key: JSON.stringify({ name, key: 'left' }),disabled: lastIndex < 2,onClick: onLeft,},{label: '关闭右侧',key: JSON.stringify({ name, key: 'right' }),disabled:(name === '/home' && items.length <= 1) ||(name !== '/home' && items.length - lastIndex < 2),onClick: onRight,},{label: '全部关闭',key: JSON.stringify({ name, key: 'all' }),onClick: onAll,disabled: name === '/home' && items.length <= 1,},],}}trigger={['contextMenu']}><span>{label}</span></Dropdown>);};useEffect(() => {const index = !items.find(({ key }) => key === pathname);const indexHome = !items.find(({ key }) => key === '/home');// 如果用户部署从主页进入，引入主页组件作为默认页签if (indexHome && pathname !== '/home') {const arr = {key: '/home',label: '首页',title: '首页',closable: false,children: <Home />,};setItems((item) => item?.concat([arr]));}// 添加当前页面到页签if (index) {const arr = {key: pathname,label: name,title: name,closable: pathname !== '/home',children: children,};setItems((item) => item?.concat([arr]));}setKey(pathname);}, []);useEffect(() => {// 页签长度发生变化时，塞入、更新所有标签右键下拉菜单setItems((items) =>items.map((item) => {return { ...item, label: labelDropdown(item.key, item.title) };}),);}, [items.length]);return (<TabshideAddsize="small"type="editable-card"activeKey={key}onEdit={onEdit}onTabClick={onTabClick}items={items}/>);
};
export default PageHeadTabs;

3. pages/Home

import PageHeadTabs from '@/components/PageHeadTabs';
import React from 'react';// *因为首页是默认页面所以有两种进入方式
// *第一种是通过/home进入，正常加载HomePage；
// *第二种是通过其他页面进入，加载Home即可。export const Home: React.FC = () => {return <div>Home</div>;
};const HomePage: React.FC = () => {return (<PageHeadTabs title="首页"><Home /></PageHeadTabs>);
};export default HomePage;

4. 其他页面

import PageHeadTabs from '@/components/PageHeadTabs';
import { Button } from 'antd';// *除了Home页面，其他的包裹一层PageHeadTabs即可实现。const AccessPage: React.FC = () => {return (<PageHeadTabs title="权限演示"><Button>按钮</Button></PageHeadTabs>);
};export default AccessPage;