PWA - what is it?
PWA stands for Progressive web app. The term is a combination of web apps and progressive enhancement. Web apps are developed using HTML, CSS and JavaScript web technologies. Progressive enhancement is a method of developing websites that requires the web application to work in any browser. Unlike an app, it is PWA therefore does not depend on the operating system. The website is accessed via a URL, but the design is adapted to the device, such as a smartphone.
How does a PWA work?
Die novelty At PWAs is the Service Worker, the development of a web worker in a web app. The service worker is a JavaScript program that running in the background and is responsible for caching so that the page can also be used offline. The first time it is called, the web server tries to install the service worker so that it is available for every subsequent call. He will - just like the associated Cache - saved in the browser. The content is loaded via the cache, so that the PWA also without internet connection can be accessed. To speed up usage, the app framework or app shell is also cached.
Die AppShell As a minimal HTML, CSS and JavaScript environment, is required to display and run the app. It forms the Defined structure of the app. It is loaded and cached first. In contrast, there is content, which is dynamic and loaded over the Internet. This can also be stored in a local repository, i.e. the cache. The caching function also makes the content available offline and speeds up the loading process.
What are the differences between native apps and web apps?
Die PWA links properties of apps with those of websites. You create a link on the screen, which causes the web app gives more of the impression of a native app. Since the content is loaded via the browser, the link uses less memory. Thanks to responsive designs, the display adapts to the device. Another advantage is that it is not necessary to install an app, which also makes it unnecessary to install updates.
