npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@hhhgamehhh/keepalive-for-react

v1.0.0

Published

A react <KeepAlive/> component like <keep-alive/> in vue

Downloads

213

Readme

English | 中文

NPM版本 NPM下载量

特性

  • 支持react-router-dom v6+
  • 支持React v16+ ~ v18+
  • 支持Suspense和懒加载导入
  • 支持错误边界
  • 支持自定义容器
  • 支持使用className activeinactive进行切换动画过渡
  • 简单实现,无需任何额外依赖和hack方式

注意事项

  • 请勿使用 <React.StrictMode />,它在开发模式下无法与keepalive-for-react一起工作。因为它可能会导致一些意外行为。

  • 在路由中仅支持react-router-dom v6+

安装

npm install keepalive-for-react
yarn add keepalive-for-react
pnpm add keepalive-for-react

使用

在react-router-dom v6+中

  1. 安装react-router-dom v6+
npm install react-router-dom keepalive-for-react
  1. 在项目中使用KeepAlive
import { KeepAliveRouteOutlet } from "keepalive-for-react";

function Layout() {
    return (
        <div className="layout">
            <KeepAliveRouteOutlet />
        </div>
    );
}

或者

import { useMemo } from "react";
import { useLocation } from "react-router-dom";
import { KeepAlive, useKeepAliveRef } from "keepalive-for-react";

function Layout() {
    const location = useLocation();
    const aliveRef = useKeepAliveRef();

    const outlet = useOutlet();

    // 确定哪个路由组件处于活动状态
    const currentCacheKey = useMemo(() => {
        return location.pathname + location.search;
    }, [location.pathname, location.search]);

    return (
        <div className="layout">
            <MemoizedScrollTop>
                <KeepAlive transition aliveRef={aliveRef} activeCacheKey={currentCacheKey} max={18}>
                    <Suspense fallback={<LoadingArea />}>
                        <SpreadArea>{outlet}</SpreadArea>
                    </Suspense>
                </KeepAlive>
            </MemoizedScrollTop>
        </div>
    );
}

详情请参见 examples/react-router-dom-simple-starter

在StackBlitz中打开

在简单标签页中

npm install keepalive-for-react
const tabs = [
    {
        key: "tab1",
        label: "标签1",
        component: Tab1,
    },
    {
        key: "tab2",
        label: "标签2",
        component: Tab2,
    },
    {
        key: "tab3",
        label: "标签3",
        component: Tab3,
    },
];

function App() {
    const [currentTab, setCurrentTab] = useState<string>("tab1");

    const tab = useMemo(() => {
        return tabs.find(tab => tab.key === currentTab);
    }, [currentTab]);

    return (
        <div>
            {/* ... */}
            <KeepAlive transition={true} activeCacheKey={currentTab} exclude={["tab3"]}>
                {tab && <tab.component />}
            </KeepAlive>
        </div>
    );
}

详情请参见 examples/simple-tabs-starter

在StackBlitz中打开

KeepAlive 属性

类型定义

interface KeepAliveProps {
    // 确定哪个组件处于活动状态
    activeCacheKey: string;
    children?: KeepAliveChildren;
    /**
     * 最大缓存数量 默认10
     */
    max?: number;
    exclude?: Array<string | RegExp> | string | RegExp;
    include?: Array<string | RegExp> | string | RegExp;
    onBeforeActive?: (activeCacheKey: string) => void;
    customContainerRef?: RefObject<HTMLDivElement>;
    cacheNodeClassName?: string;
    containerClassName?: string;
    errorElement?: ComponentType<{
        children: ReactNode;
    }>;
    /**
     * 过渡效果 默认false
     */
    transition?: boolean;
    /**
     * 过渡时间 默认200ms
     */
    duration?: number;
    aliveRef?: RefObject<KeepAliveRef | undefined>;
}

Hooks

useEffectOnActive

useEffectOnActive(() => {
    console.log("active");
}, []);

useLayoutEffectOnActive

useLayoutEffectOnActive(
    () => {
        console.log("active");
    },
    [],
    false,
);
// 第三个参数是可选的,默认为true,
// 表示在首次渲染时触发useLayoutEffect时会跳过回调

useKeepAliveContext

类型定义

interface KeepAliveContext {
    /**
     * 组件是否处于活动状态
     */
    active: boolean;
    /**
     * 刷新组件
     * @param {string} [cacheKey] - 组件的缓存键。如果未提供,将刷新当前缓存的组件。
     */
    refresh: (cacheKey?: string) => void;
    /**
     * 销毁组件
     * @param {string} [cacheKey] - 组件的缓存键,如果未提供,将销毁当前活动的缓存组件。
     */
    destroy: (cacheKey?: string | string[]) => Promise<void>;
    /**
     * 销毁所有组件
     */
    destroyAll: () => Promise<void>;
    /**
     * 销毁除提供的cacheKey外的其他组件
     * @param {string} [cacheKey] - 组件的缓存键。如果未提供,将销毁除当前活动缓存组件外的所有组件。
     */
    destroyOther: (cacheKey?: string) => Promise<void>;
    /**
     * 获取缓存节点
     */
    getCacheNodes: () => Array<CacheNode>;
}
const { active, refresh, destroy, getCacheNodes } = useKeepAliveContext();
// active 是一个布尔值,true表示活动,false表示非活动
// refresh 是一个函数,你可以调用它来刷新组件
// destroy 是一个函数,你可以调用它来销毁组件
// ...
// getCacheNodes 是一个函数,你可以调用它来获取缓存节点

useKeepAliveRef

类型定义

interface KeepAliveRef {
    refresh: (cacheKey?: string) => void;
    destroy: (cacheKey?: string | string[]) => Promise<void>;
    destroyAll: () => Promise<void>;
    destroyOther: (cacheKey?: string) => Promise<void>;
    getCacheNodes: () => Array<CacheNode>;
}
function App() {
    const aliveRef = useKeepAliveRef();
    // aliveRef.current 是一个 KeepAliveRef 对象

    // 你可以在 aliveRef.current 上调用 refresh 和 destroy
    aliveRef.current?.refresh();
    // 通常不需要手动调用 destroy,KeepAlive 会自动处理
    aliveRef.current?.destroy();

    return <KeepAlive aliveRef={aliveRef}>{/* ... */}</KeepAlive>;
}
// 或者
function AppRouter() {
    const aliveRef = useKeepAliveRef();
    // aliveRef.current 是一个 KeepAliveRef 对象

    // 你可以在 aliveRef.current 上调用 refresh 和 destroy
    aliveRef.current?.refresh();
    aliveRef.current?.destroy();
    return <KeepAliveRouteOutlet aliveRef={aliveRef} />;
}

开发

安装依赖

pnpm install

构建包

pnpm build

链接包到全局

pnpm link --global

在演示项目中测试

cd demo
pnpm link --global keepalive-for-react