一些初步考虑:
"react": "^16.8.2",
"react-scripts": "2.1.5"
我创建了一个新的反应应用程序,我需要实现推送通知。
下列的this https://developers.google.com/web/fundamentals/codelabs/push-notifications/在教程中,我能够在 5 分钟内启动并运行,但现在我必须在 React 应用程序中实施相同的策略(有点)。
我面临的问题是我能够订阅通知 API,但我不知道如何编辑service-worker.js
文件添加一个事件监听器来捕获push
event (Handle a Push Event
谷歌指南中的章节)
使用 Create React App 自定义您的 Service Worker 是可能的,但可能相当困难且棘手。
CRA 使用 Workbox 开箱即用生成软件 https://developers.google.com/web/tools/workbox/modules/workbox-webpack-plugin#generatesw_plugin_1要生成的 webpack 插件service-worker.js
文件,并且您不能向其中注入任何代码(您could https://medium.com/founding-ithaka/implementing-push-notifications-with-create-react-app-bf35cd25d870使用 CRA@1,自 CRA@2 起不再使用)
你有几种策略,我将从最简单的一种开始。
解决方案 1:提供您自己的 service-worker 文件
- in
src/index.js
启用服务工作者:// serviceWorker.unregister()
serviceWorker.register()
-
in src/serviceWorker.js
注册您的自定义文件:
// if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
if ('serviceWorker' in navigator) {
// const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
const swUrl = `${process.env.PUBLIC_URL}/custom-service-worker.js`;
运行开发服务器时必须更改名称,CRA 提供了一个mock https://github.com/facebook/create-react-app/issues/2272#issuecomment-302832432 for service-worker.js
in public/
文件夹,创建custom-service-worker.js
文件。 Webpack 会复制它as is in the build/
folder
Pros:快速、肮脏的胜利
Cons:您的自定义文件未使用 Webpack 处理(无导入),并且您必须自己实现网络缓存逻辑(假设您需要 PWA),因为您绕过了 Workbox 插件
解决方案 2:将代码附加到生成的 service-worker
有一个模块:cra-追加-sw https://github.com/bbhlondon/cra-append-sw。
您负责提供附加的代码。
Pros:设置简单,利用GenerateSW的优势
Cons:附加代码使用 Babel/Webpack 处理,但不使用 CRA 的配置(您可以选择退出)。仍然使用GenerateSW它为你处理网络缓存。不确定在本地开发时是否有效
解决方案 3:在自定义 service-worker 文件中使用 Workbox
应用解决方案#1 的前 2 个步骤:更改src/index.js
and src/serviceWorker.js
-
in src/
文件夹,创建custom-service-worker.js
文件。它将由 Webpack 处理,因此您可以使用 ES2016/TypeScript 语法并导入模块
/* eslint no-restricted-globals: "off" */
import * as precaching from 'workbox-precaching'
// your own imports
if (self.__precacheManifest) {
precaching.precacheAndRoute(self.__precacheManifest)
}
// your own code
-
install 反应应用程序重新接线 https://github.com/timarney/react-app-rewired:
npm add --save-dev react-app-rewired
- in
package.json
, in "scripts"
, 代替react-scripts
with react-app-rewired
-
调整 webpack 配置:创建config-overrides.js
在根文件夹中:
const WebpackBeforeBuildPlugin = require('before-build-webpack')
const WorkboxWebpackPlugin = require('workbox-webpack-plugin')
const path = require('path')
const merge = require('lodash.merge')
const fs = require('fs')
// from https://www.viget.com/articles/run-multiple-webpack-configs-sequentially/
class WaitPlugin extends WebpackBeforeBuildPlugin {
constructor(file, interval = 100, timeout = 60e3) {
super(function(stats, callback) {
const start = Date.now()
function poll() {
if (fs.existsSync(file)) {
callback()
} else if (Date.now() - start > timeout) {
throw Error(`Couldn't access ${file} within ${timeout}s`)
} else {
setTimeout(poll, interval)
}
}
poll()
})
}
}
const swOutputName = 'custom-service-worker.js'
const workerSource = path.resolve(__dirname, 'src', swOutputName)
module.exports = {
webpack: (config, env) => {
// we need 2 webpack configurations:
// 1- for the service worker file.
// it needs to be processed by webpack (to include 3rd party modules), and the output must be a
// plain, single file, not injected in the HTML page
const swConfig = merge({}, config, {
name: 'service worker',
entry: workerSource,
output: {
filename: swOutputName
},
optimization: {
splitChunks: false,
runtimeChunk: false
}
})
delete swConfig.plugins
// 2- for the main application.
// we'll reuse configuration from create-react-app, without a specific Workbox configuration,
// so it could inject workbox-precache module and the computed manifest into the BUILT service-worker.js file.
// this require to WAIT for the first configuration to be finished
if (env === 'production') {
const builtWorkerPath = path.resolve(config.output.path, swOutputName)
config.name = 'main-application'
config.plugins.push(
new WorkboxWebpackPlugin.InjectManifest({
swSrc: builtWorkerPath,
swDest: swOutputName
}),
new WaitPlugin(builtWorkerPath)
)
}
// remove Workbox service-worker.js generator
const removed = config.plugins.findIndex(
({ constructor: { name } }) => name === 'GenerateSW'
)
if (removed !== -1) {
config.plugins.splice(removed, 1)
}
const result = [swConfig, config]
// compatibility hack for CRA's build script to support multiple configurations
// https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/scripts/build.js#L119
result.output = { publicPath: config.output.publicPath }
return result
}
}
Pros:您可以在 service-worker 文件中使用 ES2016/TypeScript 代码。您仍然受益于 Workbox 网络缓存设施,并对其进行完全控制
Cons:复杂且脆弱,因为多重配置 hack。
我使用了最后一个解决方案,因为我需要来自 Workbox 的缓存代码和一些import
在我的服务人员文件中。
反应应用程序重新接线工作箱 https://github.com/davejm/react-app-rewire-workbox可能有助于简化 Webpack 配置(主应用程序的配置)。有待测试。
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)