Progressive web app. They're web apps that are fast and reliable.

Progressive web app What are the Challenges & Best Practices of Progressive Web Apps Development. Paul Kinlan also started a very useful Stack Overflow tag for Progressive Web Apps worth checking out Jan 28, 2025 · Da progressive Web-Apps (PWAs) genau wie andere Apps im Microsoft Store sind, können Benutzer vollständig mit ihnen interagieren – von der Ermittlung über die Installation bis hin zur Ausführung – ohne. Progressive Web Apps (PWAs) give you app-like features and functionality on the web. When a user installs the PWA for your site, it will appear as an app icon on their device screen like any other app, allowing it to be launched without going via the device's web browser. She also walks us Feb 15, 2025 · Download Progressive Web Apps for Firefox for Firefox. Sudoku. Web app manifest Developers can use web app manifest members to describe a PWA, customize its appearance, and more deeply integrate it into the operating system. by Maximiliano Firtman Twitter @firt About Newsletter. In fact, you can even publish PWAs to app stores! Nitya Narasimhan joins us to introduce PWAs. #pwa #desktop #course #ios #android. As with other cross-platform solutions, the goal is to help developers build cross-platform apps more easily than they would with native apps. But they have the feel and functionality of an actual native app. Mastermind. fr est un site français spécialisé sur les applications web progressives ou PWA. PWA বা Progressive Web App এমন একটি Mar 5, 2025 · Progressive Web Apps (PWAs) have emerged as a powerful alternative to traditional web and mobile applications, offering the benefits of both in a single, flexible platform. Games Web app. Starts fast, stays fast Performance plays a significant role in the success of any online experience, because high-performing sites engage and retain users better than poorly performing ones. Service Workers. Dec 20, 2024 · These benefits show why Progressive Web App Development is a smart choice for businesses. Sep 20, 2024 · Learn what a Progressive Web App (PWA) is, how it combines the best of web and platform apps, and how to create one. PWAs bridge the gap between traditional websites and native apps, providing faster load times, offline functionality, and improved performance, May 22, 2023 · Understanding Progressive Web Apps: 1. Les applications Progressive Web App (PWA) sont des applications Web créées et améliorées avec des API modernes pour offrir des fonctionnalités avancées tout en touchant tous les utilisateurs Web sur n'importe quel appareil avec un seul codebase. Monopoong Jan 5, 2025 · Progressive Web Apps (PWAs): Web applications that provide a native app-like experience to users, offering features such as offline support, push notifications, and home screen installation. With a PWA, a user is able to install and interact with a web application much in the same way they can a native app. 5 (229) Web Worker Offloading. 2 days ago · PWA (Progressive Web App) - সহজ ভাষায় ব্যাখ্যা 🚀. Feb 21, 2025 · This reference describes the technologies, features, and APIs that Progressive Web Apps (PWAs) can use to offer a great user experience. Jul 6, 2021 · Progressive Web Apps (PWA) have been increasingly popular in the last couple of years as developers look for ways to increase the reach of their applications. Nota: le persone tendono a pensare alle app web progressive come a un'app che l'utente può installare da un browser anziché da un app store. And most importantly, they're web apps that work in any browser. Feb 21, 2025 · Learn how to build and customize progressive web apps (PWAs) that run on multiple platforms and devices, and provide a user experience like that of native apps. Find out the key characteristics of PWAs, such as progressive enhancement, responsive design, offline functionality, and web app manifest. CycleTracker; Base HTML and CSS; Secure connection; JavaScript functionality; Manifest and iconography; Service workers Dec 6, 2019 · Progressive Web Apps wollen genau da ansetzen. Jul 3, 2018 · Últimamente oímos mucho eso de aplicaciones web progresivas o progressive web apps, ¿pero qué quiere decir esto? Hoy veremos qué son las aplicaciones web Les applications web progressives (ou progressive web applications en anglais, abrégées en PWAs) sont des applications web qui utilisent les service workers, les manifestes, et d'autres fonctionnalités de la plateforme web, avec l'amélioration progressive pour fournir aux utilisatrices et utilisateurs une expérience équivalente à celle des applications natives. Progressive web application (PWA) – progresywna aplikacja internetowa uruchamiana tak jak zwykła strona internetowa, ale umożliwiająca stworzenie wrażenia działania jak natywna aplikacja mobilna lub aplikacja desktopowa. Mar 4, 2019 · A Progressive Web App (PWA) is an app that uses modern Web capabilities to offer users a very similar (if not better) experience to a native app. Any Device. Webmaker+ brings the power of Progressive Web Apps (PWA) to your website, enabling seamless, app-like experiences that enhance user engagement and accessibility on any modern mobile device. Jul 12, 2023 · Progressive Web Applications (PWAs) are web-based applications that leverage modern web technologies to provide an app-like experience. Elles offrent des fonctionnalités améliorées, une fiabilité et une facilité d'installation améliorées, et permettent d'atteindre tous les utilisateurs, partout, sur n'importe quel appareil, à l'aide d'un seul codebase. Blurring the lines between websites and native applications, PWAs promised fast, reliable, and Les progressive web apps (PWA) sont des applications Web créées et améliorées avec des API modernes. An open-source SDK, Ionic, is based on Angular and Apache Cordova Progressive Web App frameworks. This means that PWAs need to be able to adapt to different environments and to different user expectations. Find guides, tutorials, reference, and best practices for PWAs. In this collection, you'll learn what makes a Progressive Web App special, how they can affect your business, and how to build them. Your PWA is made for mobile first and runs Nov 3, 2021 · A Progressive Web App is a website, which leads to the question: When does it become a Progressive Web App? The answer is not so simple, as the PWA concept doesn't refer to a specific technology or stack, PWA is instead a pattern including various technical components. A progressive web app’s UI should be correctly sized for the device’s form factor and screen size. In addition, it should look like a native app and be built on an application shell model. Todos sus activos son los mismos que los de la Web, pero con nuevas herramientas para que esos recursos se carguen rápido cuando estén en línea y estén disponibles cuando no hay conexión. Progressive Web App yang andal terasa cepat dan dapat diandalkan, terlepas dari jaringannya. Jan 24, 2023 · Learn how to build PWAs with web technologies that can run on all devices and provide native-like experiences. Nov 3, 2021 · All Progressive Web Apps are, at their core, modern websites, so it's important that your website has a solid foundation in responsive design, mobile and everything first, intrinsic design, and web performance. They're web apps that are fast and reliable. Whether you are an experienced developer, a project manager looking to innovate, or an app creator without programming experience, understanding what a Progressive Web App (PWA) is, is crucial. By following this tutorial, you have learned how to create a PWA using React Native, including the technical background, implementation guide, code examples, best practices, testing, and debugging. When you install the web version of Outlook as a progressive web app, you can do things like pin and launch the web version of Outlook from your computer's home screen or task bar and access your account while you're offline. Available at Web. Sep 19, 2024 · In der Checkliste für progressive Web-Apps wird beschrieben, was eine App für alle Nutzer installierbar und nutzbar macht, unabhängig von Größe oder Eingabetyp. Blazor WebAssembly is a standards-based client-side web app platform, so it can use any browser API, including PWA APIs required for the following capabilities: Progressive Web Apps (PWAs) documentation. Written by Tris Tan. How Progressive Web Apps Work. If you're building a web app today, you're already on Apr 23, 2023 · 漸進式網路應用程式（Progressive Web Apps，PWA）是一種現代網路開發模式，它使得網頁應用程式可以提供類似於原生應用的用戶體驗。透過整合網頁標準和現代瀏覽器技術，PWA 可以為用戶提供快速、可靠、和引人入勝的用戶體驗。 To create a more engaging experience, a Progressive Web App (PWA) can handle multiple protocols. The publication is one of the first news sites to abandon its native app and transition to a progressive web app. With PWA functionality, your site can offer faster load times, offline access, and an immersive experience that feels like a native app. Companies like Amazon, Google, Starbucks, Pinterest, Uber, and more use PWAs to increase engagement and streamline onboarding. den Browser zu öffnen. Apr 30, 2019 · What makes a web app, a Progressive Web App? Progressive Web Apps provide an installable, app-like experience on desktop and mobile that are built and delivered directly via the web. Like a native mobile app, the XenForo progressive web app allows your forum to be installed in an app-like manner on users' devices. A progressive web app (PWA) is a web app that can be installed on a device as a standalone app. Sep 27, 2023 · Lessons include a walk through of the HTML, CSS, and JavaScript required to create a fully functional web app, setting up a testing environment, and complete explanations guiding the learner through upgrading the web app into a PWA; including developing and inspecting a manifest, adding a service worker, and using the service worker to delete To make the app installable, the app needs a web app manifest. There are several ways in which a PWA can store data on a device, such as local storage, Cache API, or IndexedDB. Also learn with online courses Information Technology which are 100% free! Jan 12, 2023 · Progressive Web App. These apps meet certain requirements, are deployed to servers, accessible through URLs, and indexed by search engines. They load fast, work offline, and conveniently save to a home screen icon for easy access. Progressive Web Apps work by utilizing service workers, which are scripts that run in the background of a browser to enable PWA plugin is bringing the power of the Progressive Web Apps to the WP & AMP to take the user experience to the next level. A tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox Una Progressive Web App es un sitio web. Progressive Web Apps (PWAs) are web apps that deliver enhanced capabilities, reliability, and installability across devices. They can be installed on a user’s device and accessed offline, blurring the line between web and native apps. Progressive Web Apps (PWA) offer robust options to store data locally to enable users to continue working even if the network connection becomes unstable or goes offline. Wait a minute! Native Apps, what do we mean by this? Dec 10, 2024 · Progressive Web App offer several features like offline access, push notifications, and the ability to install the app directly from a browser without the need for an app store. Developers building apps targeting desktops, laptops, smartphones, and tablets, have two options to use when building their apps: native apps built specifically for the target platform, or web apps which run on most any system Building native apps for any target platform is a time-consuming and expensive proposition, especially when your app targets multiple system types (desktop computers . Explore the benefits, capabilities, and success stories of PWAs on Microsoft Edge and the Microsoft Store. Pengguna berhak mendapatkan aplikasi yang merespons interaksi dengan cepat, dan pengalaman yang dapat mereka andalkan. Progressive Web App (PWA) é um termo usado para denotar um conjunto de processos de desenvolvimento de software. Covering business and global markets, the app takes a similar look and feel of the paper with its traditional salmon-colored background. At Pyramidion, an App Development Company in Chennai, we face unique challenges when developing Progressive Web Apps (PWAs). A Uniform Resource Locator (URL) is a string that allows clients to identify a resource on the Web. However, they require an internet connection to function A progressive web app (PWA) is an app that's built using web platform technologies, but that provides a user experience like that of a platform-specific app. Progressive Web Apps (PWAs) benefit various businesses, including: Software Companies PWAs provide Software Companies and SaaS providers with the ability to deliver their products as web applications, making them accessible across devices and platforms without the need for separate installations. PWAs allow sites like Teams on the web to offer more desktop capabilities that are typically unavailable to websites. For app publishers, this directory is helpful to gain more traffic. With a progressive web app, developers can improve the legacy web application with all the ingredients and features of the mobile app. Step 3 - Create a web app manifest. See: The web app manifest in Making PWAs installable at MDN > References > Progressive Jan 6, 2020 · Progressive Web Apps (PWA) are web apps built and enhanced with modern APIs to provide enhanced capabilities while still reaching any web user on any device with a single codebase. Like all web apps, CycleTracker is designed to work in all browsers on all devices. Sep 19, 2024 · Progressive Web App adalah aplikasi web terlebih dahulu, dan itu berarti aplikasi tersebut harus berfungsi di seluruh browser. App design. Sep 19, 2024 · The Progressive Web App Checklist describes what makes an app installable and usable by all users, regardless of size or input type. Blending the benefits of a responsive website with those of a native app, PWAs represent a significant advancement in the realm of multi-platform About free courses Progressive Web Apps and Web Development. They combine the broad reach of web apps with the rich capabilities of platform-specific apps to enhance the user experience. Observação: as pessoas tendem a pensar nos Progressive Web Apps como um app que o usuário pode instalar em um navegador, em vez de uma app store. Tic Tac Toe. Logo PWA. Free. Traditional web apps and progressive web apps both allow you to run an application in a web browser, but PWAs employ newer technologies and features that make them feel more like a native Feb 21, 2025 · One of the defining aspects of a PWA is that it can be promoted by the browser for installation on the device. Feb 21, 2025 · Learn how progressive web apps (PWAs) combine the best features of websites and platform-specific apps. See examples of PWAs from various industries and platforms, and their benefits and challenges. Los service workers son una parte fundamental de una AWP. Progressive Web App (PWA, in italiano applicazione web progressiva) è un termine, coniato in origine da Google, che si riferisce ad una applicazione web che viene sviluppata e caricata come una normale pagina web, ma che si comporta in modo simile alle applicazioni native quando utilizzata su un dispositivo mobile. Une progressive web app (PWA, application web progressive en français [1]) est une application web qui consiste en des pages ou des sites web, et qui peuvent apparaître à l'utilisateur de la même manière que les applications natives ou les applications mobiles. Cara efektif untuk melakukannya adalah dengan, menurut Jeremy Keith dalam Resilient Web Design , mengidentifikasi fitur inti, menyediakan fitur tersebut menggunakan teknologi yang paling sederhana, lalu meningkatkan Oct 31, 2018 · Progressive-web-apps. One App. Jun 27, 2023 · What is a Progressive Web App? Progressive Web Applications (PWAs) are apps built with web technologies that we probably all know and love, like HTML, CSS, and JavaScript. Feb 21, 2025 · A web application manifest, defined in the Web Application Manifest specification, is a JSON text file that provides information about a web application. This allows the web app to retain or reload its state when the user bookmarks or shares the app’s URL. Nous proposons des articles, comparatifs, tutoriels par spécifiques à ce domaine. Oct 22, 2024 · A Progressive Web App (PWA) is a type of web application that can be installed on a device and provides a user experience similar to a native desktop app. Tuttavia, una PWA può essere elencata oggi in molti store come canale di distribuzione facoltativo, tra cui Google Play Store (per Android e ChromeOS), Microsoft Store (per Windows 10 e 11) e Apple App Store (per iOS, iPadOS e macOS). Tetra. Learn how to build, enhance, and integrate PWAs with modern APIs, tools, and best practices. Dec 15, 2015 · Progressive Web Apps such as Pokedex also of course work great in Opera on Android too with a few notable differences in implementation: For diving deeper into Progressive Web Apps, read Alex Russell's original blog post introducing them. A web app manifest is a JSON file containing metadata about your app, such as its name, description, icons, and the various operating system features it uses. Sep 20, 2024 · A Progressive Web App (PWA) is a type of web application built using standard web technologies like HTML, CSS, and JavaScript. Progressive Web Applications (PWAs) is an approach to developing web applications that give traditional web apps the look and feel of native apps. We will be using web technologies — HTML, CSS, and JavaScript — to build a menstruation cycle tracking web app called "CycleTracker". 4. Service Workers : JavaScript files that run in the background, allowing you to cache resources, handle network requests, and provide offline support. By combining the best features of websites and mobile apps, PWAs provide an engaging user experience while ensuring accessibility across devices. Dec 4, 2024 · Progressive Web Apps, or PWAs, are essentially web applications that offer a native app-like experience to users. When sites are secure they can leverage ServiceWorkers to provider users with offline support, Push notifications can help re-engage users, and Web App Manifests let users install PWAs alongside native apps. It improves user engagement, provides offline functionality, and ensures faster loading speeds, enhancing the overall shopping experience. PWAs work on the web, desktop, and mobile devices, combining the best features of web and native apps to deliver a fast, reliable, and engaging experience. The first part of a URL is the protocol , such as http or mailto , which lets clients know how to retrieve the resource. Service Workers are JavaScript files that run in the background of a web application and enable the app to work offline and perform background tasks such as push A Progressive Web App (PWA) is a type of app accessible via a web link that behaves similarly to a native app but runs in a web browser. One of the key differences between Progressive Web Apps and classic websites and web apps is installability. Las aplicaciones web progresivas son un patrón de diseño Obwohl progressive Verbesserung eine wünschenswerte Eigenschaft für die meisten Websites ist, ist sie besonders wichtig für PWAs, die auf einer Vielzahl von Geräten laufen sollen und häufig fortschrittliche Web-APIs verwenden, die möglicherweise nicht von allen Browsern unterstützt werden. No entanto, hoje em dia, uma PWA pode ser listada em muitas app stores como um canal de distribuição opcional, incluindo a Google Play Store (para Android e ChromeOS), a Microsoft Store (para Windows 10 e 11) e a Apple App Store (para iOS, iPadOS Learn Progressive Web App. Unter dem Eindruck der Erkenntnis, dass auch Google großen Wert auf die Erhaltung des offenen Web legen muss, erscheint es geradezu logisch, dass sich die Kalifornier massiv an der Durchsetzung des Konzeptes der Progressive Web Apps beteiligen „Progressive Web Apps sind responsive und per HTTPS übertragene Webanwendungen, die nach dem Grundsatz des Progressive Enhancement die Fähigkeiten der Browser für eine fortschreitende Verbesserung nutzen, wodurch mittels Offlinefunktionalität über Service Worker, eine Installation anhand eines Web App Manifests und Push Notifications eine zuverlässige, motivierende und native Jan 28, 2025 · Progressive Web Apps (PWA) are made possible by utilizing modern Progressive web development technologies such as Service Workers, Web App Manifests, and Responsive Web Design. The advantage of flexibility creates issues in the Progressive Web App frameworks when used. PWA może zostać zainstalowana, wtedy może posiadać własną ikonę na pulpicie oraz być niezależna od przeglądarki. dev. 1 What is a Progressive Web App? Progressive Web Apps (PWAs) are web applications that utilize modern web technologies to provide users with an app-like Create, validate and optimize web app manifests for Progressive Web Apps (PWA). Introduction to Progressive Web Apps (PWAs) Progressive Web Apps (PWAs) have revolutionized the digital landscape, combining the best of web and mobile applications. For a course that breaks down every aspect of modern progressive web app development, check out Learn PWA. Las aplicaciones web progresivas (mejor conocidas como PWAs por «Progressive Web Apps») son aplicaciones web que utilizan APIs y funciones emergentes del navegador web junto a una estrategia tradicional de mejora progresiva para ofrecer una aplicación nativa —como la experiencia del usuario para aplicaciones web multiplataforma. Nov 12, 2024 · A Blazor Progressive Web Application (PWA) is a single-page application (SPA) that uses modern browser APIs and capabilities to behave like a desktop app. Generate complete PWA packages with icons, service workers, and platform-specific configurations. Provide a native-like UX, or run in the browser. They offer an enhanced user experience with the power of modern web technologies. [15] Progressive Web-Apps können ganz einfach über eine neue Installationsschaltfläche in der Adressleiste von Chrome (Omnibox) installiert werden. Ionic. Ao contrário dos tradicionais aplicativos, um Progressive Web App pode ser visto como uma evolução híbrida entre as páginas da web regulares (ou sites) e um aplicativo móvel. Tiga pilar utama Progressive Web App yaitu capable, reliable, installable. Majhong Solitaire. PWAs are built using web technologies, but provide a user experience like that of a native app, with features like offline and background operation, dedicated UI, and OS integration. Build real-world websites. Like a website, a PWA can run on multiple platforms and devices from a single codebase. Learn about Progressive Web Apps through courses and resources on Frontend Masters. Learn about the history, characteristics, technical criteria, and technologies of PWAs from this Wikipedia article. Nov 22, 2024 · This intro-level tutorial walks through all the steps of building a basic progressive web app, or PWA. Jan 15, 2025 · Using React Native for Progressive Web Apps (PWAs) is a great way to build web applications that provide a native app-like experience to users. This guide walks you through enabling and configuring these features Steps to download the Agent Progressive Web App (PWA) to your computer. They are built and delivered using web technologies such as HTML, CSS, and JavaScript while mimicking the performance and usability of native apps. The most common use for a web application manifest is to provide information that the browser needs to install a progressive web app (PWA) on a device, such as the app's name and icon. Logo Progressive Web App. This free course (a mix between an e-book and an interactive workshop) covers the fundamentals of Progressive Web App development into easy-to-understand pieces. Progressive Web Apps sind das Beste beider Welten. 3 days ago · Progressive Web Apps (PWAs) have emerged as a game-changer in the digital landscape, offering businesses a cost-effective and highly engaging alternative to traditional web and mobile applications 渐进式 Web 应用（Progressive Web App，PWA）是一个使用 web 平台技术构建的应用程序，但它提供的用户体验就像一个特定平台的应用程序。 它像网站一样，PWA 可以通过一个代码库在多个平台和设备上运行。 Progressive Web Apps start with a traditional web site/application and progressively enhance with modern features. A free interactive course available at web. . Progressive Web App (PWA) คือเว็บแอปที่สร้างขึ้นและปรับปรุงด้วย API สมัยใหม่เพื่อมอบความสามารถที่เพิ่มขึ้นไปพร้อมกับการเข้าถึงผู้ใช้เว็บทุกคนบนอุปกรณ์ May 20, 2021 · A lot has changed in the world of Progressive Web Apps since we released our last set of PWA training over four years ago: CSS Grid achieved widespread implementation, PWAs came to desktops, and the capabilities project has launched more than 25 new device-integration focused APIs, opening up brand new app segments that can be built entirely on Jan 2, 2025 · The Financial Times progressive web app is considered one of the best PWAs in the news industry. You want to build your own progressive web app? Get started with our development page or use this training articles to build your first progressive web app. Combining the simplicity and addictive gameplay of the original with the advanced features of modern web technologies, Progressive Web Flap offers an engaging gaming experience accessible on any device with a web browser. Progressive web apps are all designed to work on any browser that is compliant with the appropriate web standards. Progressive Web App (disingkat PWA) adalah sebuah aplikasi web yang dirancang atau dibangun dengan melakukan optimasi pada sebuah website. The PWA Hub is a library of 30+ resources covering all basic Progressive Web App concepts: what it is, how it works, how it benefits users Dec 9, 2024 · It wasn’t long ago that Progressive Web Apps (PWAs) were heralded as the future of web development. Great examples of progressive web apps in one room. Startet schnell, bleibt schnell Die Leistung spielt eine wichtige Rolle für den Erfolg einer Website, da leistungsstarke Websites Nutzer besser binden als langsame. Forget what you know about native Apps – Progressive Web Apps are the new masters of mobile in 2019. Develop a web app that can be installed and run on all devices, from one codebase. Nov 19, 2024 · Since any big company does not own the Progressive Web App development framework, its support team is tiny. Once installed, a PWA appears to users as a platform-specific app, a permanent feature of their device which they can launch directly from the operating system like any other app. APP製作,網站製作,程式設計,軟體公司,軟體設計,APP設計,UX設計,軟體開發,E化系統,沉浸式網頁,PWA,漸進式行動應用程式,Progressive Web Apps,貝姆資訊Arshire是專業的APP、網站設計,企業應用系統,E化系統,資料視覺化客製化軟體設計公司 Jul 30, 2024 · PWA（Progressive Web App，渐进式网页应用，渐进式接近原生app的web app）是一种理念，使用多种技术来增强web app的功能，可以让网站的体验变得更好，能够模拟一些原生功能，比如通知推送。在移动端利用标准化框架，让网页应用呈现和原生应用相似的体验。 Jul 4, 2023 · Progressive web apps; Guides; What is a progressive web app? Installing and uninstalling web apps; Making PWAs installable; Offline and background operation; Caching; Best practices for PWAs; Tutorials; CycleTracker. [1] This progressive web app directory is for anyone interested in PWAs and for developers to give them examples of PWAs. Jul 20, 2023 · Unlike a traditional web app, a progressive web app can even be installed to a computer or mobile device and run like any other app in its own window. Feb 21, 2025 · Progressive Web Apps (PWAs) can be installed on devices and used as traditional websites in web browsers. Pacman. Progressive Web Flap is a contemporary reinterpretation of the classic game Flappy Bird, designed as a Progressive Web App (PWA). Jan 25, 2024 · Learn what a Progressive Web App (PWA) is and how it combines web and mobile app capabilities. Progressive web apps pack the power of mobile websites into the easy-to-use package of an app. Geogee! Tower Game. 6 Followers Nov 29, 2016 · A Progressive Web App (PWA) is a web app that uses modern web capabilities to deliver an app-like experience to users. A Laravel eCommerce PWA (Progressive Web App) is a web application built using Laravel and designed to offer an app-like experience on mobile and desktop devices. Our free web development courses cover everything you need to know to become a skilled developer, from HTML and CSS to JavaScript and beyond. PWAs can be saved to a device’s home screen and support push notifications, ensuring seamless user engagement without needing an app store download. Python----Follow. jvfwi yqzezvv rgfy zhs exgmffnh otfl eidq vxtj dvnn iyc pzy nkamta rrylhw lvyko lexcc