投稿時間:2022-04-03 14:12:54 RSSフィード2022-04-03 14:00 分まとめ(14件)

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js	JavaScriptタグが付けられた新着投稿 - Qiita	オープンソース動向	https://qiita.com/from_usa/items/c34d2ba5691c3916db8f	関連	2022-04-03 13:42:24
Linux	Ubuntuタグが付けられた新着投稿 - Qiita	Chromeで上のタイトルバーを非表示にする【Ubuntu 22.04 Jammy Jellyfish】	https://qiita.com/relu/items/876d54a781590ed7efb2	chrome	2022-04-03 13:20:24
Linux	CentOSタグが付けられた新着投稿 - Qiita	仮想マシンの初期設定、CentOS7のインストール・起動手順（macOS）	https://qiita.com/maru_chan35/items/4024a23082c90f93fb0b	仮想マシンの初期設定、CentOSのインストール・起動手順macOS概要備忘録として、下記手順を記載する。	2022-04-03 13:10:36
Git	Gitタグが付けられた新着投稿 - Qiita	Gitのコミット署名の有効期限を更新するために行ったことメモ	https://qiita.com/cocoabreak/items/6e096f89b179eb704ec7	更新したサブ鍵で署名をすれば、GitHubではVerified状態となります。	2022-04-03 13:35:15
Ruby	Railsタグが付けられた新着投稿 - Qiita	rails db:migrateの意味	https://qiita.com/program9989/items/6d51de587b7a6ee83fe6	railsdbmigrate	2022-04-03 13:01:12
海外TECH	DEV Community	React 18: Everything you need to know	https://dev.to/ruppysuppy/react-18-everything-you-need-to-know-lh2	React Everything you need to knowAfter the release of React famously known as the no feature release we finally have the stable version of React which went live on th March Wondering what changed in the new version This article got you covered Initialization ChangesIf your app is using an old version of React you can update it to the latest version usingnpm install react react dom ORyarn add react react dom There are no breaking changes in React but the setup has been modified to utilize the new features In the index file there is a new syntax to plug in the React App OLD METHOD import ReactDOM from react dom ReactDOM render lt App gt document getElementById root NEW METHOD import ReactDOM from react dom client const root ReactDOM createRoot document getElementById root root render lt App gt With that small tweak you are good to go You can now use the plethora of new features React has to offer Concurrent ModeIf the entire React update has to be summed up in one word it would be Concurrency At a high level concurrency basically means that tasks can overlap Rather than one state update having to be fully complete before the system can move on to the next one concurrency allows us to bounce back and forth between multiples It should be noted that this doesn t mean those things are all happening at the same time ーrather it s that one task can now be paused while other more urgent tasks are completed Let s take a look at the new APIs to utilize it useTransitionThe useTransition hook is a new API that allows the users to mark any less urgent actions as transitions and then tell React to let other more urgent actions take priority in the rendering timeline The ideal use case of it would be when multiple non urgent but computationally expensive tasks are being performed eg filtering a long list which causes a delay in urgent tasks eg handling user input resulting in a poor UX POOR UX DUE TO FREEZING OF THE UIconst input setInput useState const data millionItems filter item gt item includes input const updateInput e gt setInput e target value GREAT UX DUE TO PRIORITIZATIONconst input setInput useState const data setData useState items const isPending startTransition useTransition useEffect gt startTransition gt setData items filter i gt i includes input input const updateInput e gt setInput e target value The isPending value can also be used to conditionally display a spinner to inform the user that some action is being performed in the background useDeferredValueThe new useDeferredValue hook allows us to select specific parts of our UI and intentionally defer updating them so they don t slow down other parts of our page There are two nice things about this Control over rendering orderAbility to show previous or old values instead of just a loading animation or grey box In most cases displaying a few pieces of stale data triumphs over showing a full page loading animation Let s take a look at how to use the hook const deferredValue useDeferredValue value return lt MyComponent value deferredValue gt Both the useTransition and useDeferredValue hooks take an additional parameter to specify the timeout in milliseconds useTransitionconst isPending startTransition useTransition timeoutMs useDeferredValueconst deferredValue useDeferredValue value timeoutMs Automatic BatchingBatching refers to grouping multiple state updates into a single re render for better performance This is great for performance because it avoids unnecessary re renders Earlier React would batch changes due to browser actions but not the state changes triggered inside Promises or Timeouts In React the developers overcame the hurdle and made it possible to batch all state updates Before only React events were batched setTimeout gt setCount c gt c setFlag f gt f React will render twice once for each state update After updates inside of timeouts promises native event handlers or any other event are batched setTimeout gt setCount c gt c setFlag f gt f React will only re render once at the end Streaming Server Side RenderingServer Side Rendering is a technique where you render the HTML output of your React component and then send that over to the client before the JS is ready so that the user is not stuck staring at a completely blank page It has incredible performance and SEO benefits Before React this was handled in an all or nothing approach when all the components were ready the page would be generated That meant that if you had just one slow component that one component could create a bottleneck This can be avoided using Suspense We could wrap a single slow component in the Suspense tags and tell React to delay its loading and instead focus on sending down the other smaller ones first You can also set a fallback to show a loading animation lt Suspense fallback lt Loading gt gt lt SlowComponent gt lt Suspense gt Now you are React ready too Happy Developing Research says writing down your goals on pen amp paper makes you to more likely to achieve them Check out these notebooks and journals to make the journey of achieving your dreams easier Thanks for readingNeed a Top Rated Front End Development Freelancer to chop away your development woes Contact me on UpworkWant to see what I am working on Check out my Personal Website and GitHubWant to connect Reach out to me on LinkedInI am a freelancer who will start off as a Digital Nomad in mid Want to catch the journey Follow me on InstagramFollow my blogs for Weekly new Tidbits on DevFAQThese are a few commonly asked questions I get So I hope this FAQ section solves your issues I am a beginner how should I learn Front End Web Dev Look into the following articles Front End Development RoadmapFront End Project Ideas	2022-04-03 04:44:19
海外TECH	DEV Community	React Portals: create and open modals with keyboard keys	https://dev.to/djra26111990/react-portals-create-and-open-modals-with-keyboard-keys-1gc2	React Portals create and open modals with keyboard keysHi there In this post we will create the following When we finished to build this app it will be look like this The goal when building this app is to provide a mechanism to open a modal pressing the button on the screen or when we press F to F keys of ours keyboards to achieve the same objective To begin with i ve use vite to build this project but you can use any other tools like create react app or build from scratch using webpack and react This project was made using TypeScript and Material UI to not begin from scratch styling our components First we need to know what a React portal is React docs says Portals provide a first class way to render children into a DOM node that exists outside the DOM hierarchy of the parent component Normally when you return an element from a component s render method when you have an class component or when you return JSX using functional component it s mounted into the DOM as a child of the nearest parent node However sometimes it s useful to insert a child into a different location in the DOM Basically it is here when the React Portals come to the rescue Here you can find the full code here in this Github RepoFirst we re gonna clean up our App tsx component src App tsxfunction App return lt div gt Hello world lt div gt export default App Lets create a ButtonComponent tsx file in the following path src components Button index tsximport Button from material ui core export const ButtonComponent children variant color handleClick gt return lt Button variant variant color color onClick handleClick gt children lt Button gt So good so fine but if you remember we re using TypeScript right So let s create an interface for the props in the following path src types Interfaces tsximport ReactChildren from react export interface IButtonProps children JSX Element ReactChildren string variant contained outlined text undefined color primary secondary default undefined handleClick gt void and we re gonna return to our previous component and add the new created interface import Button from material ui core import IButtonProps from types Interfaces export const ButtonComponent children variant color handleClick IButtonProps gt return lt Button variant variant color color onClick handleClick gt children lt Button gt Now we need to return to our App tsx component and add our new ButtonComponent created src App tsximport ButtonComponent from components Button function App return lt div gt lt ButtonComponent variant contained color primary handleClick handleClick gt Open Modal F F F lt ButtonComponent gt lt div gt export default App We re going to create a custom hook to handle the Keypress events logic and made it reusable across our components src hooks useKeyEvents tsximport useState useEffect from react export const useKeyEvents key string callback gt void boolean gt const keyPressed setKeyPressed useState lt boolean gt false useEffect gt const handleKeyDown e KeyboardEvent gt if e key key e preventDefault setKeyPressed true callback window addEventListener keydown handleKeyDown return gt window removeEventListener keydown handleKeyDown key callback return keyPressed We re gonna use React Context API to handle our global state so we need to create our Context src context keyeventContext tsximport createContext useContext from react const initialState isOpen false setIsOpen gt handleClick gt const KeyEventContext createContext initialState export const useKeyEventContext gt useContext KeyEventContext export default KeyEventContext Now we re gonna return to our Interfaces tsx file and add a new Interface for our Context src types Interfaces tsx Our previous Interfaceexport interface IEventContext isOpen boolean setIsOpen React Dispatch lt React SetStateAction lt boolean gt gt handleClick gt void and now we import our interface in our keyeventContext tsx file and added to our createContext function as generic type import createContext useContext from react import IEventContext from types Interfaces const initialState isOpen false setIsOpen gt handleClick gt const KeyEventContext createContext lt IEventContext gt initialState export const useKeyEventContext gt useContext KeyEventContext export default KeyEventContext we need to create our Provider component to wrap our App component src context keyeventState tsximport React useState from react import KeyEventContext from keyeventContext import useKeyEvents from hooks useKeyEvents export const KeyEventState React FC children gt const isOpen setIsOpen useState lt boolean gt false const handleClick gt console log Our lt ButtonComponent gt was clicked useKeyEvents F gt console log F pressed useKeyEvents F gt console log F pressed useKeyEvents F gt console log F pressed return lt KeyEventContext Provider value isOpen setIsOpen handleClick gt children lt KeyEventContext Provider gt We need to import our useKeyEventContext created in our keyeventContext tsx in our App tsx file componentimport ButtonComponent from components Button import useKeyEventContext from context keyeventContext function App const isOpen setIsOpen handleClick useKeyEventContext return lt div gt lt ButtonComponent variant contained color primary handleClick handleClick gt Open Modal F F F lt ButtonComponent gt lt div gt export default App We import our KeyEventState and wrap our App Component in the main tsx fileimport React from react import ReactDOM from react dom import App from App import KeyEventState from context keyeventState ReactDOM render lt React StrictMode gt lt KeyEventState gt lt App gt lt KeyEventState gt lt React StrictMode gt document getElementById root And we test our App until now to see what we re achieving Wow it s working but we need yet to create our Modal component using React portals so src components Portal index tsximport useState useLayoutEffect from react import createPortal from react dom type State HTMLElement null function createWrapperAndAppendToBody wrapperId string const wrapperElement document createElement div wrapperElement setAttribute id wrapperId document body appendChild wrapperElement return wrapperElement function Portal children id modal id const wrapperElement setWrapperElement useState lt State gt null useLayoutEffect gt let element document getElementById id as HTMLElement let systemCreated false if element systemCreated true element createWrapperAndAppendToBody id setWrapperElement element return gt if systemCreated amp amp element parentNode element parentNode removeChild element id if wrapperElement null return null return createPortal children wrapperElement as HTMLElement export default Portal Create another Interface named IPortalProps in our Interfaces tsx file Our previous interfaces export interface IPortalProps id string children JSX Element ReactChildren string and we import and use our new created interface in our Portal componentimport useState useLayoutEffect from react import createPortal from react dom import IPortalProps from types Interfaces type State HTMLElement null Our createWrapperAndAppendToBody functionfunction Portal children id modal id IPortalProps const wrapperElement setWrapperElement useState lt State gt null Our useLayourEffect logic amp other stuff return createPortal children wrapperElement as HTMLElement export default Portal We create a Modal component src components Modal index tsximport useEffect useRef from react import CSSTransition from react transition group import Paper Box from material ui core import ButtonComponent from Button import Portal from Portal function Modal children isOpen handleClose const nodeRef useRef null useEffect gt const closeOnEscapeKey e KeyboardEvent gt e key Escape handleClose null document body addEventListener keydown closeOnEscapeKey return gt document body removeEventListener keydown closeOnEscapeKey handleClose return lt Portal id modalId gt lt CSSTransition in isOpen timeout enter exit unmountOnExit nodeRef nodeRef classNames modal gt lt div className modal ref nodeRef gt lt ButtonComponent variant contained color secondary handleClick handleClose gt Close lt ButtonComponent gt lt Box sx display flex flexWrap wrap amp gt not style m width rem height rem gt lt Paper elevation gt lt div style display flex alignItems center justifyContent center marginTop rem gt children lt div gt lt Paper gt lt Box gt lt div gt lt CSSTransition gt lt Portal gt export default Modal And we create another Interface for Props in our Modal component All interfaces previously created so farexport interface IModalProps isOpen boolean children JSX Element ReactChildren string handleClose gt void So we import our new interface in our Modal component All others previous import import IModalProps from types Interfaces function Modal children isOpen handleClose IModalProps All logic stuff for the Modal component And we create a new css file to add styles for our Modal src components Modal modalStyle css modal position fixed inset background color rgba display flex flex direction column align items center justify content center transition all s ease in out overflow hidden z index padding px px px opacity pointer events none transform scale modal enter done opacity pointer events auto transform scale modal exit opacity transform scale And we install react transition group package into our project to add some transition animations on our Modal component giving it a very good looking effect and we import our new created modalStyle css file to our Modal file src components Modal index tsx All other imports import modalStyle css function Modal children isOpen handleClose IModalProps All logic of our Modal component Until now our ButtonComponent is placed at the left upper corner so we re going to create a new LayOut Component to Wrap our to position it to the center src components Layout index tsximport Box from material ui core Box export const LayOut React FC children gt return lt div style width gt lt Box display flex justifyContent center m p bgcolor background paper gt children lt Box gt lt div gt So now we are going to finish our App importing our Layout Component and our new Modal to the App Component src App tsximport ButtonComponent from components Button import LayOut from components Layout import Modal from components Modal import useKeyEventContext from context keyeventContext function App const isOpen setIsOpen handleClick useKeyEventContext const handleClose gt setIsOpen false return lt div gt lt LayOut gt lt ButtonComponent variant contained color primary handleClick handleClick gt Open Modal F F F lt ButtonComponent gt lt Modal isOpen isOpen handleClose handleClose gt Hi there i m a modal lt Modal gt lt LayOut gt lt div gt export default App You are going to think yay we did it so far we re done but no we need to add a little change on our keyeventState tsx file to complete the functionality desired src context keyeventState tsximport React useState from react import KeyEventContext from keyeventContext import useKeyEvents from hooks useKeyEvents export const KeyEventState React FC children gt const isOpen setIsOpen useState lt boolean gt false const handleClick gt setIsOpen true useKeyEvents F gt setIsOpen true useKeyEvents F gt setIsOpen true useKeyEvents F gt setIsOpen true return lt KeyEventContext Provider value isOpen setIsOpen handleClick gt children lt KeyEventContext Provider gt And the magic happens when you press your F to F keys and ESC key to close our Modal We did it so far in this article until now but remember only practice makes a master Remember to keep improving and investigating new things to add to your projects and get better and better Tell me your thoughts about this post in the comments and see ya in another post	2022-04-03 04:30:27
海外ニュース	Japan Times latest articles	How the Bank of Japan took on the bond vigilantes and won — for now	https://www.japantimes.co.jp/news/2022/04/03/business/bank-of-japan-bond-battle/	How the Bank of Japan took on the bond vigilantes and won ーfor nowJapan was the epicenter of market drama after the central bank set in motion a four day long unlimited buying spree of government bonds last week	2022-04-03 13:02:28
海外ニュース	Japan Times latest articles	Hinako Shibuno falters at Chevron to see hopes of major title fade	https://www.japantimes.co.jp/sports/2022/04/03/more-sports/golf/shibuno-chevron-third-round/	Hinako Shibuno falters at Chevron to see hopes of major title fadeThe year old led by a stroke after two rounds at Mission Hills Country Club but then dropped to over par carding two birdies three bogeys	2022-04-03 13:21:17
海外ニュース	Japan Times latest articles	Christian Eriksen inspires Brentford to historic win over Chelsea	https://www.japantimes.co.jp/sports/2022/04/03/soccer/brentford-chelsea-eriksen/	Christian Eriksen inspires Brentford to historic win over ChelseaAfter beating Chelsea for the first time since Brentford has now won all three Premier League games in which Eriksen has started after failing	2022-04-03 13:07:25
北海道	北海道新聞	長野・善光寺で御開帳始まる　参拝密避け最長８８日間	https://www.hokkaido-np.co.jp/article/664854/	重要文化財	2022-04-03 13:18:25
北海道	北海道新聞	三浦綾子生誕１００年　記念文学館で特別展始まる　「塩狩峠」口述筆記原稿も	https://www.hokkaido-np.co.jp/article/664858/	三浦綾子	2022-04-03 13:34:03
北海道	北海道新聞	森、右人さし指骨折で抹消　西武、主力の離脱相次ぐ	https://www.hokkaido-np.co.jp/article/664880/	人さし指	2022-04-03 13:23:00
海外TECH	reddit	Post WWE WrestleMania 38 (WrestleMania Saturday) Discussion Thread!	https://www.reddit.com/r/SquaredCircle/comments/tv0i09/post_wwe_wrestlemania_38_wrestlemania_saturday/	Post WWE WrestleMania WrestleMania Saturday Discussion Thread WWE WrestleMania WrestleMania Saturday Results Results from Tonight s Show Match Stipulation Winner Becky Lynch c vs Bianca Belair Singles match for the WWE Raw Women s Championship Bianca Belair Rey Mysterio and Dominik Mysterio vs The Miz and Logan Paul Tag team match The Miz and Logan Paul Drew McIntyre vs Happy Corbin with Madcap Moss Singles match Drew McIntyre The Usos Jey Uso and Jimmy Uso c vs Shinsuke Nakamura and Rick Boogs Tag team match for the WWE SmackDown Tag Team Championship The Usos The New Day Xavier Woods and Kofi Kingston vs Sheamus and Ridge Holland with Butch Tag team match Match never happened Seth quot Freakin quot Rollins vs Cody Rhodes Singles match Mr McMahon will announce Rollins opponent on the night of the event Cody Rhodes Charlotte Flair c vs Ronda Rousey Singles match for the WWE SmackDown Women s Championship Charlotte Flair Stone Cold Steve Austin vs Kevin Owens No holds barred match Stone Cold Steve Austin KO Show with Stone Cold Steve Austin post segment discussion More Links Full recap of tonight s show available on Wrestling Observer Make your voice heard by voting on r SquaredCircle s official poll for tonight s show who was your wrestler of the night and what was your match of the night submitted by u Coldcoffees to r SquaredCircle link comments	2022-04-03 04:05:18