投稿時間:2022-03-28 16:46:22 RSSフィード2022-03-28 16:00 分まとめ(51件)

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TECH	Engadget Japanese	米Amazonの倉庫に一時「謎の煙」充満、しかし従業員には説明なく通常業務を指示	https://japanese.engadget.com/amazon-warehouse-workers-told-to-work-even-when-smoke-fills-the-air-060036588.html	amazon	2022-03-28 06:00:36
IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] スイートが約60％割引　ホテルニューオータニ幕張の「エイプリルフールセール」	https://www.itmedia.co.jp/business/articles/2203/28/news129.html	itmedia	2022-03-28 15:23:00
IT	ITmedia 総合記事一覧	[ITmedia PC USER] サードウェーブ、台湾Cypress製のフルスペック8K対応HDMIケーブルを取り扱い開始	https://www.itmedia.co.jp/pcuser/articles/2203/28/news131.html	cypress	2022-03-28 15:20:00
IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] キヤノン、レンズ交換式デジタルカメラの世界シェア1位　19年連続	https://www.itmedia.co.jp/business/articles/2203/28/news116.html	itmedia	2022-03-28 15:15:00
IT	ITmedia 総合記事一覧	[ITmedia Mobile] デジタルバンク「みんなの銀行」、デビットカード利用で1万円が当たるキャンペーン	https://www.itmedia.co.jp/mobile/articles/2203/28/news127.html	itmediamobile	2022-03-28 15:06:00
IT	ITmedia 総合記事一覧	[ITmedia News] iPhone 14 Proの広角カメラは4800画素センサーか　著名アナリスト、改めて主張	https://www.itmedia.co.jp/news/articles/2203/28/news128.html	iphonepro	2022-03-28 15:05:00
IT	情報システムリーダーのためのIT情報専門サイト IT Leaders	NTT Com、データセンターの電力メニューを拡充、再生可能エネルギーを選択可能に | IT Leaders	https://it.impress.co.jp/articles/-/22901	NTTCom、データセンターの電力メニューを拡充、再生可能エネルギーを選択可能にITLeadersNTTコミュニケーションズNTTComは年月日、同社データセンターの電力メニューを拡充し、再生可能エネルギーを選択できる電力メニューを年月日から提供すると発表した。	2022-03-28 15:34:00
AWS	lambdaタグが付けられた新着投稿 - Qiita	make(旧integromat)を使ってLambdaを実行する〜EC2の起動・停止篇	https://qiita.com/okome-chan/items/c38e8be82c544e940a36	メッセージはkeyvalueでLambdaに渡して、ECの起動・停止の判定に利用します。	2022-03-28 15:19:33
python	Pythonタグが付けられた新着投稿 - Qiita	Python で Azure の サブスクリプションを列に日を行とする使用料金一覧表を作成してみました	https://qiita.com/turupon/items/4e078450a6040dcec843	PythonでAzureのサブスクリプションを列に日を行とする使用料金一覧表を作成してみました概要AzureSDKforPythonを利用して、サブスクリプションを列に、日を行とする使用料金表を作成し、この表の最終行にその日までの合計の使用料金を追加した一覧表を作成するためのPythonプログラムです。	2022-03-28 15:27:18
python	Pythonタグが付けられた新着投稿 - Qiita	Blender でハノイの塔の動画を自動生成	https://qiita.com/hibit/items/0c43826cd79e939b4dc9	Blenderでハノイの塔の動画を自動生成上のような動画を作成しました。	2022-03-28 15:03:13
js	JavaScriptタグが付けられた新着投稿 - Qiita	【Stimulus】targetがある時だけ関数を実行する方法	https://qiita.com/tomoronn3/items/33e3c6d01f529b8d1003	【Stimulus】targetがある時だけ関数を実行する方法はじめにRailsでJavascriptを利用するときはStimulusを使うのがデフォルトになっています。	2022-03-28 15:58:19
AWS	AWSタグが付けられた新着投稿 - Qiita	make(旧integromat)を使ってLambdaを実行する〜EC2の起動・停止篇	https://qiita.com/okome-chan/items/c38e8be82c544e940a36	メッセージはkeyvalueでLambdaに渡して、ECの起動・停止の判定に利用します。	2022-03-28 15:19:33
Azure	Azureタグが付けられた新着投稿 - Qiita	Python で Azure の サブスクリプションを列に日を行とする使用料金一覧表を作成してみました	https://qiita.com/turupon/items/4e078450a6040dcec843	PythonでAzureのサブスクリプションを列に日を行とする使用料金一覧表を作成してみました概要AzureSDKforPythonを利用して、サブスクリプションを列に、日を行とする使用料金表を作成し、この表の最終行にその日までの合計の使用料金を追加した一覧表を作成するためのPythonプログラムです。	2022-03-28 15:27:18
Ruby	Railsタグが付けられた新着投稿 - Qiita	【Stimulus】targetがある時だけ関数を実行する方法	https://qiita.com/tomoronn3/items/33e3c6d01f529b8d1003	【Stimulus】targetがある時だけ関数を実行する方法はじめにRailsでJavascriptを利用するときはStimulusを使うのがデフォルトになっています。	2022-03-28 15:58:19
海外TECH	DEV Community	Canon IJ Network Tool	https://dev.to/mmichaelwills/canon-ij-network-tool-nch	Canon IJ Network ToolCanon IJ Network Tool is a toolkit software with the options to keep a check on most of your Canon printer network settings and adjust them according to your requirements The Canon IJ Network tool will get you through the network settings uninterruptedly Canon IJ Printer Utility is a complete software package meant to adjust and modify the configurations of your printer device as per the requirement	2022-03-28 06:36:53
海外TECH	DEV Community	Graph Algorithm - Cycle Detection in Undirected Graph using DFS	https://dev.to/rohithv07/graph-algorithm-cycle-detection-in-undirected-graph-using-dfs-233j	Graph Algorithm Cycle Detection in Undirected Graph using DFS What is a cycleIn graph theory a path that starts from a given node and ends on the same node is a cycle Cycle Detection in an Undirected GraphA graph is said to be undirected if it is bidirectional It is a set of vertices and edges connected where edges are bidirectional The cycle in a graph can be detected using graph traversal algorithms Let us discuss the cycle detection using Depth First Search Algorithm DFS Algorithm for Cycle Detection in an Undirected GraphInitialise a visited boolean array with all nodes unvisited Below is a disconnected graph of nodes from to with a visited array initialised Run a loop from to and start our DFS recursive function when the node is not visited passing the current node where is the previous node initially Inside the recursive function dfs graph node previousNode Mark the node as visited Traverse through the children of the current node If the child is not visited call the recursive dfs function passing the child and the current node The current node will be the previous node of the child node If the child is visited and the previous node child node our dfs function returns false denoting no cycle is detected If the child is visited and the previous node child node this means we reached our child through some other path which will result in a cycle Our dfs function returns true which denotes the function has detected a cycle If we continue with our algorithm and the recursive function returns false at the very end we haven t detected any cycle throughout the graph or else we have detected a cycle in the graph Time and Space ComplexityWe are traversing through all the nodes and edges So time complexity will be O V E where V vertices or node E edges We use a visited array queue and an adjacency list for the graph So the space complexity will be O V O V E extra space for the recursion stack CodeOriginally Published on LinkedIn Newsletter Practice ProblemCycle Detection in undirected graph Github Link Rohithv LeetCodeTopInterviewQuestions Leetcode Top Interview questions discussed in Leetcode LeetCodeTopInterviewQuestionsLeetcode Top Interview questions discussed in Leetcode Also Question answered from CodeSignal com View on GitHub	2022-03-28 06:34:26
海外TECH	DEV Community	Advanced Appetite Fat Burner Reviews - (Pros and Cons) Is It Scam Or Legit?	https://dev.to/advancedappetitefatburner/advanced-appetite-fat-burner-reviews-pros-and-cons-is-it-scam-or-legit-543c	Advanced Appetite Fat Burner Reviews Pros and Cons Is It Scam Or Legit Advanced Appetite Fat Burner It is basic to be cautious with respect to any new eating schedule Frenzy eats less carbs have been around for likewise lengthy as the eating less unhealthy food industry itself and basically every a la mode eating routine goes with its own not immaterial summary of supporting upgrades Associations consistently use the advancement of another well known eating routine expect to design their own famous upgrade plans and the ketosis diet isn t a lot Numerous different upgrades assurance to help with sending your body into the ideal state of ketosis Extraordinary many individuals have endeavored these improvements with fluctuating results OFFICIAL WEBSITE More Info	2022-03-28 06:33:33
海外TECH	DEV Community	CSS art sucks	https://dev.to/dailydevtips1/css-art-sucks-5api	CSS art sucksCSS art has a very distinguish pro vs anti vibe going on and I m never really sure why First let s dive into what CSS art is or what it means to me CSS Art is a creative outlet of using CSS to style elements on a page to look appealing visually Some people use it to recreate existing designs artworks or figures and some people go from an empty canvas The result is always some stunning magical piece of art that is powered by CSS It s uselessThe most common thing you ll hear is people saying but it s useless It has no purpose and even can be seen as a waste of time I m always blown away by these remarks So are you saying art in general is useless What s the purpose of a painting What s the purpose of a sculpture Or a bit more relevant these days what s the purpose of an NFT I ll leave it up to you to decide though Why I do CSS artI m not sure if my ones contemplate art but let s state it is For me it s a super lovely outlet to try unique and not often used CSS techniques By making CSS art my general CSS knowledge improves and becomes better For instance creating this artwork taught me about double border radius and how it works Or another one I did helped me understand the frosted effect These are often elements I can use in my day to day CSS work but in a more obvious way How to get started I think this is one of the most asked questions and it depends on what you are looking for For instance if you d like to get into pixel art the process might be different I believe in creating to grow and I find this the way that works for me Meaning start by doing and exploring When I created the Totoro above I started with an image and overlayed my CSS on this Then when I got stuck I asked Twitter for help which helped me improve the piece So my best advice is to start with an image and overlay the image with divs and start working from there And as always start small take small steps and work your way up to more significant pieces Another great way can be to indulge in CSS art challenges you can find their pop up more and more and they are a great starting point for your first CSS artwork Learn from othersWhen trying to get into CSS art keep a closeout for other people They might have techniques you haven t seen before and can help you become better at them And like always you can learn from each other they might find certain aspects of your works fascinating and the other way around With this said share some of the works you are super proud of Love to see them on Twitter Thank you for reading and let s connect Thank you for reading my blog Feel free to subscribe to my email newsletter and connect on Facebook or Twitter	2022-03-28 06:33:00
海外TECH	DEV Community	Api Java for Italian Electronic Invoice	https://dev.to/tudor44/api-java-for-italian-electronic-invoice-347k	electronic	2022-03-28 06:30:20
海外TECH	DEV Community	Why Choose a Laravel Ecommerce PWA for Your Business	https://dev.to/sumyya_khan/why-choose-a-laravel-ecommerce-pwa-for-your-business-3pao	Why Choose a Laravel Ecommerce PWA for Your BusinessNowadays most people use mobile apps to visit websites By using PWA you can generate more traffic on the website PWA stands for a Progressive Web Application This is an application constructed from the web technologies we all know and adore like HTML CSS and JavaScript but with a feel and functionality that is competent as a real native app Thanks to a couple of smart additions you can turn almost any website into a progressive web app This means that you can build a PWA rather quickly in regards to a native app that s pretty difficult to develop Moreover you can propose all the characteristics of native apps like push notifications offline support and much more Many websites you encounter online are Progressive Web Apps Suppose we take the example of twitter com If you visit that site on your smartphone you can install it on your home screen Now on opening the saved Twitter site you ll witness that it looks and functions just like a native app There s no browser window or any difference in running it from an iPhone or an Android smartphone You just have to simply log in and you re good to go That s the primary advantage of constructing your web app with a PWA in mind PWAs are gaining popularity Many prominent websites are PWAs like Starbucks com Flipboard com AliExpress com Pinterest com Washingtonpost com and Uber com are even installable on your home screen and present a comparative experience to their native applications Laravel Ecommerce PWALaravel Ecommerce Progressive Web Application uses web compatibilities and provides an application experience to the user By using a Laravel Ecommerce progressive web app you can do things like work on a low internet connection load on the home screen Social Sharing of products etc The Progressive Web Application is lightning fast as compared to the simple website Due to the immediate execution as result user engagement increases on the website As we know that Flipkart is the largest eCommerce platform Firstly they utilized the only app after that they introduced Flipkart PWA as Flipkart Lite With the help of PWA it converts of users to customers Features of Laravel Ecommerce PWAMore user friendly than a web application Dynamic SEO Push Notification functionality Admin can add PWA home page layout Also work with low quality internetDo not need to update Progressive web Application Admin can set the splash background color of the Progressive Web Application The admin can enter the application name Looks and feels like a native application Increases user engagement in the store Admin can upload and change the application icon Admin can set the theme color of the Progressive Web Application Support multiple currencies Support social sharing feature of the product Benefits of PWALess Storage UsageIf you compared it to any traditional application the cost of utilizing Laravel eCommerce PWA is very low for the customer Laravel eCommerce PWA doesn t require any substantial storage and performs better on their smartphones User FriendlyUsers can easily access the Laravel eCommerce PWA through a browser like Chrome Safari and Opera PWA is mobile device independent so it can work on any mobile device Offline ModePWA would also behave even if you are disconnected from the internet connection This feature is primarily valuable for businesses that have a catalog where the user does not require to reload it again and again to view it Prompt LoadingWhen the user adds any progressive web app on the home screen with the help of the service worker it loads immediately FOR G connection It takes sec to load for the first visit and sec to fully load the page It takes sec for the second visit HTTPS SecurePWA offers HTTPS secure solutions which enable the browser to manage some level of server encryption This improves the benefit of PWA as it performs only through HTTPS to prevent the common man in middle attack Easy Social SharingWhile using a PWA you can effortlessly share the products on your favorite social media spots like Facebook Twitter Whatsapp etc with your friends and relatives to obtain their views The feature is also furnished to work in offline mode Closing NotesThe Web development team at Codebrisk contemplates PWA to be the future of web applications for the BC and BB sectors Here are some of the services we offer as a PWA app development company like PWA UI design PWA web development PWA integration etc If you need to develop a PWA for your enterprise the Codebrisk team has impressive experience in PWA development and will be glad to assist you with your projects Please feel free to contact us For More News amp Updates Follow me on Twitter iamSumyyaKhan	2022-03-28 06:30:15
海外TECH	DEV Community	Generated Bitcoin Address and Private key (hdwallet)	https://dev.to/pymmdrza/generated-bitcoin-address-and-private-key-hdwallet-470a	Generated Bitcoin Address and Private key hdwallet Bitcoin HDWallet Generator Privatekey address Bitcoin wallet creat and check private key and address with total transaction use HDWallet View Full Source Here genereted bitcoin wallet private key and addressgenereted from random private key hexer check wallet details and all transaction without apikey save wallet gt on text fileeasy install windows and linux INSTALL cmd and INSTALL sh for install package on windows INSTALL cmd or this pip install coloramapip install hdwalletpip install lxmlpip install requestsfor install package on Linux INSTALL sh or this pip install coloramapip install hdwalletpip install lxmlpip install requestscan use easy running with loop use btcHDall cmd btcHDall py For Genereted and Checked type Address All in One ppkh psh pwpkh pwsh btcHDall cmd ppkh cmd psh cmd pwpkh cmd pwsh cmdLinux sh btcHDall shsh ppkh shsh psh shsh pwpkh shsh pwsh shGenereted ppkh address use ppkh py or ppkh cmd or ppkh sh ppkh py source Genereted pwpkh address use pwpkh py or pwpkh cmd or pwpkh sh pwpkh py source Genereted psh address use psh py or psh cmd or psh sh psh py source Generated pwsh address use pwsh py or pwsh cmd or pwsh sh pwsh py source View Full Source Here DONATE BTC pyEstGYcnofGNvUJMEGKiAWhAruR Website Mmdrza Com Email X mmdrza Com Dev to Mmdrza Github com Pymmdrza	2022-03-28 06:29:22
海外TECH	DEV Community	The Duality of CLS with Lazy Loading Components	https://dev.to/zwacky/the-duality-of-cls-with-lazy-loading-components-1e5g	The Duality of CLS with Lazy Loading ComponentsWhen you optimise your web app your goal is to make the experience better for the user That means usually faster by transferring and parsing less data But caution The same web app can cause Cumulative Layout Shift CLS on slower connections but runs without CLS on faster connection If you d like a refresher about Core Web Vitals I explained them with GIFs in this post TL DR slower connections can result in CLS when lazy loading components that you wouldn t see on wifi connections Either don t lazy load the component at all or await for the js file to be loaded and mounted The DualityWe assume that a web app loads the same on slower connections just slower Unfortunately that s not always the case with lazy loadable components With lazy loadable components we deal with two asyncnesses async API responses JSON async lazy loading components JS What if the API responses are faster than the dynamically loaded JS What if you lazy load a component that sits in the middle of your web content The answer to these questions you see in the screencapture above Google will punish you with CLS CLS measurementI ve seen a lot of confusion about Core Web Vitals especially CLS Unlike other Core Web Vitals CLS is continuously measured and cumulatively added to the score For a classic SPA web app this means that Google will keep the CLS score on a per route basis CLS has the following characteristics After each route change the CLS resets to After any user interaction you get a grace period of ms where CLS is not taken into accountMeasurements by real users Chrome users send Core Web Vitals metrics to Google directly It s not a Googlebot that captures these metrics while crawling the site These real user measurements are collected as Field Data and flow into Google s CrUX report That means you need to take the real world into account If you have a lot of traffic from India but your servers are on the other end of the world that your LCP Largest Contentful Paint will probably suffer If you have a lot of traffic from China it s likely that some services are blocked by Chinese ISPs and won t load This could cause unwanted CLS within your content SolutionsWe need to be in full control of what to display to the user at what time With duality in mind we need to know the following are API requests still loading are async components components still loading A skeleton loader is an ideal way to wait until both API requests and async components are ready Solution Don t lazy load components at allThe quickest and least error prone solution would be to pass on lazy loading components In most cases the saved kilobytes through lazy loading doesn t justify the CLS that it might cause If your performance budget allows it go with this solution Let s assume we have a web app with logged in users function render not all users require to download and render HugeComponent if isLoggedIn return lt HugeComponent gt Without code splitting we d send the JS of lt HugeComponent gt to of the users that don t need it This can affect LCP and FID With code splitting we d pack the JS of lt HugeComponent gt into the additional comps js chunk and only send it over the wire when it s needed without code splittingimport HugeComponent from components HugeComponent with code splittingconst HugeComponent gt await import webpackChunkName additional comps components HugeComponent default There are two criterias that help you decide if you should lazy load a component or not size of how often would be rendered for usersIf you come to the conclusion that your performance budget is tight and you need to lazy load the component see solution Solution Await loading and mounting of componentIf your component isn t used for the majority of users and it would increase the bundle by a lot have a look at this solution Wait for async components to be lazily loaded and mounted can be tricky You need to render the component but the mounting happens later Here s a gist of how it could be done function Parent isLoggedIn const isLoading setLoading useState false important only hide the children with display none if we used if else we d never load the lazy loadable component and then we d never change isLoading with its callback const styles display isLoading none block return HugeComponent is lazy loaded because not all users will need it isLoggedIn amp amp lt HugeComponent style styles mounted gt setLoading true gt display skeleton element for time of loading isLoading amp amp lt div className skeleton loader gt lt div gt function HugeComponent props mounted gt void const dataA setData useState null useEffect async gt const result await lib request setData result tell the parent component that everything is ready to be fully rendered props mounted return If we didn t use display hidden for the loading state on the lt HugeComponent gt we d never trigger the loading of the async component Thus Line would never be reached and the isLoading state would stay on false forever ConclusionWhen you lost green URLs in the Google Search Console due to CLS and you can t reproduce it yourself try debugging your web app with a slower connection So if you re using lazy loadable components chances are high that might be a victim of the duality of CLS	2022-03-28 06:29:15
海外TECH	DEV Community	bitcoin wallet generated wait random private key (HDWallet)	https://dev.to/mmdrza/bitcoin-wallet-generated-wait-random-private-key-hdwallet-51bn	bitcoin wallet generated wait random private key HDWallet Bitcoin HDWallet Generator Privatekey address Bitcoin wallet creat and check private key and address with total transaction use HDWallet View Full Source Here genereted bitcoin wallet private key and addressgenereted from random private key hexer check wallet details and all transaction without apikey save wallet gt on text fileeasy install windows and linux INSTALL cmd and INSTALL sh for install package on windows INSTALL cmd or this pip install coloramapip install hdwalletpip install lxmlpip install requestsfor install package on Linux INSTALL sh or this pip install coloramapip install hdwalletpip install lxmlpip install requestscan use easy running with loop use btcHDall cmd btcHDall py For Genereted and Checked type Address All in One ppkh psh pwpkh pwsh btcHDall cmd ppkh cmd psh cmd pwpkh cmd pwsh cmdLinux sh btcHDall shsh ppkh shsh psh shsh pwpkh shsh pwsh shGenereted ppkh address use ppkh py or ppkh cmd or ppkh sh ppkh py source Genereted pwpkh address use pwpkh py or pwpkh cmd or pwpkh sh pwpkh py source Genereted psh address use psh py or psh cmd or psh sh psh py source Generated pwsh address use pwsh py or pwsh cmd or pwsh sh pwsh py source View Full Source Here DONATE BTC pyEstGYcnofGNvUJMEGKiAWhAruR Website Mmdrza Com Email X mmdrza Com Dev to Mmdrza Github com Pymmdrza	2022-03-28 06:27:57
海外TECH	DEV Community	VitaPost Reviews Scam Shark Tank Natural Health Support Formula Is It Really Works	https://dev.to/vitapostoffer/vitapost-reviews-scam-shark-tank-natural-health-support-formula-is-it-really-works-14ma	VitaPost Reviews Scam Shark Tank Natural Health Support Formula Is It Really WorksThey expect to find gold with VitaPost VitaPost Reviews will add so much to the overall VitaPost Reviews design That layout just couldn t be the same without the predilection I wonder why this intention hasn t caught on here How do brothers grab bargain VitaPost Reviews reviews Despite that some fellow travelers may think so I might have to go over this issue It was foul smelling We ll get into my depictions of beginners using it There are wide ranges of assumptions in this method of thinking I tell competitors to mind their own business All places this offer using it have more or less the same restrictions	2022-03-28 06:15:45
海外TECH	DEV Community	How to Generate QR Code in Laravel 8?	https://dev.to/codeanddeploy/how-to-generate-qr-code-in-laravel-8-39e0	How to Generate QR Code in Laravel Originally posted visit and download the sample code In my previous post I m posted about barcodes now I m sharing about QR codes in a separate post We know that QR codes are so important to quicker the sharing of data like website links app links product links secret codes and many others So if you have a project in Laravel that needs to generate a QR code maybe it could help you To shortcut our effort thanks to this QR code generator package by milon Okay let s start Step Laravel Installationcomposer create project prefer dist laravel laravel laravel qrcodeThen go to the project directory cd laravel qrcode Step Database ConfigurationIf your Laravel project is fresh then you need to update your database credentials Just open the env file in your Laravel project DB CONNECTION mysqlDB HOST DB PORT DB DATABASE your database name hereDB USERNAME your database username hereDB PASSWORD your database password here Step Install PackageNext we will install our barcode package by milon Run the following command below composer require milon barcode Step Create Controller amp RoutesThen run the following command to generate controller php artisan make controller QRCodeControllerAnd add the route below to routes web phpRoute get qrcode App Http Controllers QRCodeController index gt name home index Then see below our QRCodeControllercode lt phpnamespace App Http Controllers use Illuminate Http Request class QRCodeController extends Controller public function index link return view barcode link gt link Step Add ViewThen create a file barcode blade php to resources views directory See the following code below lt DOCTYPE html gt lt html gt lt head gt lt meta charset utf gt lt meta http equiv X UA Compatible content IE edge gt lt title gt Laravel QR Code Demo codeanddeploy com lt title gt lt meta name viewport content width device width initial scale gt lt link rel stylesheet href dist css bootstrap min css gt lt head gt lt body gt lt div class container mt gt lt h gt SCAN QR CODE FOR MORE LARAVEL TUTORIALS lt h gt lt br gt lt br gt lt div class mb gt DNSD getBarcodeHTML link QRCODE lt div gt lt div gt lt div gt lt body gt lt html gt Then run your Laravel project php artisan serveThen view the below URL to your browser http qrcodeI hope this tutorial can help you Kindly visit here if you want to download this code Happy coding	2022-03-28 06:10:23
海外TECH	DEV Community	Adding Event Listeners outside of the NgZone	https://dev.to/tarungurang/adding-event-listeners-outside-of-the-ngzone-9g	Adding Event Listeners outside of the NgZoneIf we re familiar with the Angular framework we ll know that by default any asynchronous event triggers the change detection process In certain situations we don t even have to worry about it it just works as expected However in some cases running the change detection process too frequently can lead to poor runtime efficiency Execution of code in the NgZoneAssume that we want to call the console log method when we click the button Click handler in NgZone lt button gt Click me lt button gt import AfterViewChecked Component from angular core Component selector my app templateUrl app component html styleUrls app component css export class AppComponent implements AfterViewChecked onClick console log onClick ngAfterViewChecked console log CD performed When we click the button both the bound event listener and the change detection process are triggered In a real world scenario instead of calling console log we could perform an action that does not require bindings to be updated Incorrect usage of the runOutsideAngular methodAlthough the method in question allows us to opt out of the change detection process it must provide code to register an event listener As a result the following solution which simply runs the callback outside of the NgZone will not prevent the change detection process from being performed import AfterViewChecked Component NgZone from angular core Component selector my app templateUrl app component html styleUrls app component css export class AppComponent implements AfterViewChecked constructor private readonly zone NgZone onClick this zone runOutsideAngular gt console log onClick ngAfterViewChecked console log CD performed Execution of code outside of the NgZone using ViewChildWe may use the ViewChild decorator to get a reference to the DOM node and add an event listener in one of the following ways Read More Introduction To Angular Cli Builders Click handler outside NgZone lt button gt Click me lt button gt import AfterViewChecked AfterViewInit Component ElementRef NgZone Renderer ViewChild from angular core import fromEvent from rxjs Component selector my app templateUrl app component html styleUrls app component css export class AppComponent implements AfterViewInit AfterViewChecked ViewChild btn btnEl ElementRef constructor private readonly zone NgZone private readonly renderer Renderer onClick console log onClick ngAfterViewInit this setupClickListener ngAfterViewChecked console log CD performed private setupClickListener this zone runOutsideAngular gt this setupClickListenerViaNativeAPI this setupClickListenerViaRenderer this setupClickListenerViaRxJS private setupClickListenerViaNativeAPI this btnEl nativeElement addEventListener click gt console log onClick private setupClickListenerViaRenderer this renderer listen this btnEl nativeElement click gt console log onClick Execution of code outside of the NgZone using directiveWhile the previous paragraph s solution works well it is a little verbose we can encapsulate the logic in an attribute directive which allows dependency injection to provide easy access to the underlying DOM element ElementRef token Then outside of the NgZone we can add an event listener and emit an event when it s appropriate Click handler outside NgZone lt button gt Click me lt button gt import Directive ElementRef EventEmitter NgZone OnDestroy OnInit Output Renderer from angular core Directive selector click zoneless export class ClickZonelessDirective implements OnInit OnDestroy Output click zoneless clickZoneless new EventEmitter private teardownLogicFn Function constructor private readonly zone NgZone private readonly el ElementRef private readonly renderer Renderer ngOnInit this zone runOutsideAngular gt this setupClickListener ngOnDestroy this teardownLogicFn private setupClickListener this teardownLogicFn this renderer listen this el nativeElement click event MouseEvent gt this clickZoneless emit event Execution of code outside of the NgZone using Event Manager PluginThe directive based approach has the disadvantage of not being able to be configured for an event type Thankfully Angular allows us to build our Event Manager Plugin In other words we take control of adding a listener for an event whose name corresponds to the predicate function the supports method If a match is found the addEventListener method is called allowing us to handle the job The two methods are part of the user defined service that is registered as an EVENT MANAGER PLUGINS token provider Click handler outside NgZone lt button class btn btn primary gt Click me lt button gt import Injectable from angular core import EventManager from angular platform browser Injectable export class ZonelessEventPluginService manager EventManager supports eventName string boolean return eventName endsWith zoneless addEventListener element HTMLElement eventName string originalHandler EventListener Function const nativeEventName eventName split this manager getZone runOutsideAngular gt element addEventListener nativeEventName originalHandler return gt element removeEventListener nativeEventName originalHandler import NgModule from angular core import BrowserModule EVENT MANAGER PLUGINS from angular platform browser import AppComponent from app component import ClickZonelessDirective from click zoneless directive import ZonelessEventPluginService from zoneless event plugin service NgModule imports BrowserModule declarations AppComponent ClickZonelessDirective bootstrap AppComponent providers provide EVENT MANAGER PLUGINS useClass ZonelessEventPluginService multi true export class AppModule Fortunately by calling the initialization code from outside the NgZone we can avoid triggering the change detection process rd party lib initialized outside NgZone lt button gt Hover me lt button gt import Directive ElementRef NgZone OnInit from angular core import tippy from tippy js Directive selector appTooltip export class TooltipDirective implements OnInit constructor private readonly zone NgZone private readonly el ElementRef ngOnInit this zone runOutsideAngular gt this setupTooltip private setupTooltip tippy this el nativeElement content Bazinga Conclusion If we find ourselves in a situation where we are performing a task that does not need binding updates in response to a DOM event we can improve the performance of our application by not triggering an unwanted change detection run Outside of the NgZone we must be careful when registering an event listener The most elegant and reusable solution is to use a custom Event Planner Plugin If we re using a third party solution that modifies the DOM we should think about running its initialization code outside of the NgZone	2022-03-28 06:06:32
金融	日本銀行：RSS	連続指値オペの実施について	http://www.boj.or.jp/announcements/release_2022/rel220328d.pdf	指値オペ	2022-03-28 16:00:00
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海外ニュース	Japan Times latest articles	Japan braces for the day it will be forced to use missile defense system	https://www.japantimes.co.jp/news/2022/03/28/national/japan-missile-interception-north-korea/	Japan braces for the day it will be forced to use missile defense systemNorth Korea s launch of its monster new ICBM last Thursday has prompted Tokyo to re examine shooting down missiles that threaten Japanese territory ーsomething Japan	2022-03-28 15:33:55
海外ニュース	Japan Times latest articles	Yen tumbles as BOJ intervenes to keep bond yields pinned down	https://www.japantimes.co.jp/news/2022/03/28/business/financial-markets/yen-six-year-low/	december	2022-03-28 15:18:01
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ビジネス	東洋経済オンライン	積立投信は｢米国･インデックス型｣が結局いい訳 今年は金融引き締めが加速する見込みだが… | 投資 | 東洋経済オンライン	https://toyokeizai.net/articles/-/537472?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2022-03-28 16:00:00
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