投稿時間:2022-12-28 06:16:19 RSSフィード2022-12-28 06:00 分まとめ(18件)

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海外TECH	DEV Community	Key React 18 release features in 2022	https://dev.to/diogorodrigues/key-react-18-release-features-in-2022-2fi0	Key React release features in The long awaited version of React was finally released this year and it was just as famous as its previous version when Hooks were released In this article to close out the year on a high note we ll dive into the top features of this release to understand why it s making waves in the frontend community While this new version of React brings many major changes to using this JS library it doesn t break your existing code which also means that what you ve already learned about React is still valid and useful However knowing its new features will improve your code and help you develop better user interfaces To summarise this article check below which features this post will talk about React DOM APIConcurrent RenderingState Update Batching lt Suspense gt componentWhat s nextI wrote another article recently covering new React documentation in case you re interested in reading more about what s new in this library React DOM API migrating to React version To take advantage of everything this version has to offer after updating your React project version just apply a small change to the root file Now instead of using ReactDOM render we need to use the new root API method createRoot See how to do it below Beforeimport render from react dom const container document getElementById app render lt App tab home gt container Afterimport createRoot from react dom client const container document getElementById app const root createRoot container createRoot container if you use TypeScriptroot render lt App tab home gt Isn t that easy “ReactDOM render is no longer supported in React Use createRoot instead Until you switch to the new API your app will behave as if it s running React React docs Features built on top of Concurrent RenderingIn their words Concurrency is the result of years of research to improve how the library works So it s not necessarily a feature but a change at the core of the React s rendering model that allows for powerful implementations from this new version Through this innovation React can provide ways to stop pause and later start a rendering again to prioritise urgent UI changes without blocking the interface Concurrency is not a feature per se It s a new behind the scenes mechanism that enables React to prepare multiple versions of your UI at the same time React docsSo unlike versions prior to which render component updates synchronously right now React has some new features to work around this useTransitiion it tells React that an update process is about to start however React doesn t have to wait for that process to finish before processing other React updates To better understand take a look at the examples using a Tabs UI component in the React documentation to see how a state update wrapped by useTransition does not block the UI even when it takes a long time to process startTransition following React words it s very similar to useTransition the difference is that it doesn t provide a isPending flag to track whether a transition is ongoing and it can be used outside components for example for an external library Read more about startTransition here useDeferredValue this is useful when React needs to keep the old state value in the UI by applying the necessary UI changes while the new state value is being processed and then ready to be added to the UI Without it the UI would be stuck waiting for the new state value before being changed See examples in the documentation I know that these explanations may sound complicated to understand so I recommend that you take a look at the documentation links above and if you prefer watch this awesome video below As Maximilian mentioned in the video above React Concurrency is still in its early days so we ll likely see some patterns and best practices around using these features later on but I hope you can get off to a good start with this State Update BatchingFor better performance React groups multiple state update calls within a running process into a single render For example you have an event handler that when executed will call separate setState Instead of re renders React will perform the update of all states and then re render the component This is called a batch State Update Batching is not a new feature in the library however it only worked for React event handlers prior to this release This version now automates batches for promises setTimeout native event handlers or any other event not batched in React by default Let s see a snippet code below for a better understanding setTimeout gt setCount c gt c setFlag f gt f Instead of render twice once for each state update no batching now React will only re render once at the end that s batching As you can see there is a list of setState in the setTimeout method which React will only execute once before re rendering the component This is an amazing technique as it avoids unnecessary renderings contributing to better performance Suspense in Data Frameworks lt Suspense gt componentThis is another existing feature that has been improved in this new version of React Suspend is a way to display a fallback for a component until its children have data being loaded for example a loading feedback message or an animated spinning icon Take a look at the code below from the React docs to see how it can be implemented lt Suspense fallback lt Loading gt gt lt ChildrenComponent gt lt AnotherChildrenComponent gt lt Suspense gt So assuming each children component is processing some data fetching lt Suspense gt will display the lt Loading gt component in the meantime It helps us handle this multiple loading by having this logic in the parent component in a very easy way While React only allows it to be used together with React lazy it can now also be used to fetch data from opinionated frameworks like Relay Next js Hydrogen or Remix But the idea for the future is to extend this functionality to other data resources such as images for example Learn more about lt Suspense gt in the React documentation or watching the video below What s nextReact team is working on several new features and we ll probably see much more releases using Concurrency in the future For now here are the possible next improvements they announced in June of this year Server ComponentsAsset LoadingStatic Server Rendering OptimizationsReact Optimizing CompilerOffscreenTransition TracingNew React DocsDisclaimer “To set expectations this is not a roadmap with clear timelines Many of these projects are under active research and are difficult to put concrete ship dates on They may possibly never even ship in their current iteration depending on what we learn Instead we want to share with you the problem spaces we re actively thinking about and what we ve learned so far React team For a complete explanation of these next features ideas take a look at “React Labs What We ve Been Working On ConclusionAs you can see Concurrent Rendering is the most important feature unlocked by React as it is a breakthrough in this version that promises to bring much more sophisticated features in the future based on it React is changing a lot to help us build better UIs in terms of performance and I m really excited to see what happens in For now I think the whole frontend community is celebrating this gift that React has given us this year Tell me which change you like the most in this React release and what you expect for next year See you in ツ	2022-12-27 20:38:23
海外TECH	DEV Community	Top 7 Featured DEV Posts from the Past Week	https://dev.to/devteam/top-7-featured-dev-posts-from-the-past-week-57cb	Top Featured DEV Posts from the Past WeekEvery Tuesday we round up the previous week s top posts based on traffic engagement and a hint of editorial curation The typical week starts on Monday and ends on Sunday but don t worry we take into account posts that are published later in the week Tips to Improve your TypeScriptLearning Typescript is often a quest of rediscovery Your initial impression can be pretty deceptive so take these tips from ymc along with you on your journey Tips That Make You a Better Typescript Programmer ymc for ZenStack・Dec ・ min read typescript javascript webdev frontend Difficulty in Scaling WebsocketsWebsockets are an important part of the web and they need more recognition in the software development world Find out what makes websockets unique with nooptoday Why Websockets are Hard To Scale nooptoday・Dec ・ min read websocket scalable stateful backend React s New DocumentationFrom basic to advanced topics these docs cover everything you need to learn how to use the best of modern React to create user interfaces Explore React s new documentation with diogorodrigues as they highlight some of its key advantages React s new killer documentation focused only on functional components Diogo Rodrigues・Dec ・ min read react frontend webdev javascript Hello React Goodbye useEffectIn this article imbios will show you how to use React to replace useEffect in most cases Find out why you should ditch useEffect for features that will make your code cleaner and easier to maintain Hello React Goodbye useEffect I Hope Imamuzzaki Abu Salam・Dec ・ min read webdev javascript react beginners API Tester Mobile AppBackend developers can test APIs with one of many popular tools however none of these manage to handle API testing through an easy to use mobile app Check out what the API Tester Mobile App from mariamarsh can do for you How To Test CRUD RESTful APIs With the API Tester Mobile App Maria Marshmallow・Dec ・ min read api beginners testing webdev Free and Open Source Resume BuilderFree and accessible resume builders can be hard to find so check out this open source resume builder highlighted by cppshane Finally a Free and Open Source Resume Builder Without Watermarks or Limitations Shane Duffy・Dec ・ min read opensource career Billions of unnecessary files in GitHubSome files don t need to be in GitHub either because they can be generated later or because they re easily accessible in other places To that effect szabgab shows us how gitignore can be a useful tool to keep track of your repositories Billions of unnecessary files in GitHub Gabor Szabo・Dec ・ min read github programming python webdev That s it for our weekly Top for this Tuesday Keep an eye on dev to this week for daily content and discussions and be sure to keep an eye on this series in the future You might just be in it	2022-12-27 20:03:08
Apple	AppleInsider - Frontpage News	Former patent attorney sues Apple over harassment & discrimination	https://appleinsider.com/articles/22/12/27/former-patent-attorney-sues-apple-over-harassment-discrimination?utm_medium=rss	Former patent attorney sues Apple over harassment amp discriminationA former patent attorney for Apple has sued the company over discrimination and harassment after she complained about a male colleague Apple under fire for discriminationJayna Richardson Whitt sued the company in California claiming Apple retaliated against her after it learned of her domestic abuse victim status by turning her down for higher level positions She seeks unspecified compensation for economic losses and emotional distress Read more	2022-12-27 20:32:37
Apple	AppleInsider - Frontpage News	Save an extra 20% on Twelve South products with GameStop's year-end savings	https://appleinsider.com/articles/22/12/27/save-an-extra-20-on-twelve-south-products-with-gamestops-year-end-savings?utm_medium=rss	Save an extra on Twelve South products with GameStop x s year end savingsGameStop is offering year end deals on various products from Twelve South at an extra off clearance prices Plus get free day shipping on purchases over Twelve South sale via GameStopTwelve South makes accessories for Apple devices and other products and there are excellent deals to choose from at GameStop Here are a few of our favorites Read more	2022-12-27 20:12:51
ニュース	BBC News - Home	Cody Fisher stabbed to death on Birmingham nightclub dance floor	https://www.bbc.co.uk/news/uk-england-birmingham-64103150?at_medium=RSS&at_campaign=KARANGA	heart	2022-12-27 20:15:08
ニュース	BBC News - Home	Deadly blizzard leaves more than 60 dead across US	https://www.bbc.co.uk/news/world-us-canada-64099642?at_medium=RSS&at_campaign=KARANGA	blizzard	2022-12-27 20:27:55
ニュース	BBC News - Home	Man, 62, dies after being hit by police car in Livingston	https://www.bbc.co.uk/news/uk-scotland-edinburgh-east-fife-64098548?at_medium=RSS&at_campaign=KARANGA	boxing	2022-12-27 20:40:58
ニュース	BBC News - Home	Chelsea 2-0 Bournemouth: Hosts claim comfortable win to boost top-four hopes	https://www.bbc.co.uk/sport/football/64035053?at_medium=RSS&at_campaign=KARANGA	Chelsea Bournemouth Hosts claim comfortable win to boost top four hopesChelsea boost their top four hopes as they resume their Premier League season with a comfortable victory over Bournemouth at Stamford Bridge	2022-12-27 20:12:46
ビジネス	ダイヤモンド・オンライン - 新着記事	タイの富裕層が大視察団！ニセコの次に外国人が「爆買い」するリゾート地とは？ - 貧国ニッポン 「弱い円」の呪縛	https://diamond.jp/articles/-/314736	感染拡大	2022-12-28 05:25:00
ビジネス	ダイヤモンド・オンライン - 新着記事	KDDI社長が喝破！楽天の巨額投資はナンセンス、「もはや設備は競争領域にあらず」 - 総予測2023	https://diamond.jp/articles/-/314522	円安進行	2022-12-28 05:20:00
ビジネス	ダイヤモンド・オンライン - 新着記事	自販機市場が9年連続縮小でも「逆張り投資」をする理由、ダイドー社長に聞く - Diamond Premium News	https://diamond.jp/articles/-/315450	diamondpremiumnews	2022-12-28 05:17:00
ビジネス	ダイヤモンド・オンライン - 新着記事	三菱商事、伊藤忠、三井物産の社長3人が明かす「2023年のドル円相場」予測 - 総予測2023	https://diamond.jp/articles/-/314521	三菱商事、伊藤忠、三井物産の社長人が明かす「年のドル円相場」予測総予測三菱商事が年月期決算で兆円超の純利益予想を見込むなど、絶好調の商社業界。	2022-12-28 05:15:00
ビジネス	ダイヤモンド・オンライン - 新着記事	楽天のプラチナバンド交渉は「救世主ドコモ案」で決着か、念願の電波獲得でも先は視界不良 - 楽天 解体の序章	https://diamond.jp/articles/-/315104	大立ち回り	2022-12-28 05:10:00
ビジネス	ダイヤモンド・オンライン - 新着記事	イタリアのトリュフ戦争、命を落とす犬 - WSJ発	https://diamond.jp/articles/-/315496	戦争	2022-12-28 05:05:00
北海道	北海道新聞	大阪でひき逃げ２人死亡２人けが　堺市の市道、後ろから衝突	https://www.hokkaido-np.co.jp/article/781534/	堺市中区小阪	2022-12-28 05:17:00
北海道	北海道新聞	＜社説＞政府の国葬検証　正当化の方便にできぬ	https://www.hokkaido-np.co.jp/article/781499/	安倍晋三	2022-12-28 05:01:00
ビジネス	東洋経済オンライン	日銀ショック!金利上昇で株価上がる業種はどこ 統計的手法で｢上がる業種｣｢下がる業種｣を抽出 | 市場観測 | 東洋経済オンライン	https://toyokeizai.net/articles/-/642637?utm_source=rss&utm_medium=http&utm_campaign=link_back	日経平均株価	2022-12-28 05:40:00
ビジネス	東洋経済オンライン	大企業エリート社員が転職で失敗する残念な真実 意外な成功の決め手は｢弱い人的ネットワーク｣ | リーダーシップ・教養・資格・スキル | 東洋経済オンライン	https://toyokeizai.net/articles/-/634513?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2022-12-28 05:20:00