As a Progressive Web Appliction Developer my experties are:
HTML 5
HTML5 is the latest version of Hypertext Markup Language, the code that describes web pages. It's actually three kinds of code: HTML, which provides the structure; Cascading Style Sheets (CSS), which take care of presentation; and JavaScript, which makes things happen.
What does HTML5 do?
We've come a long way since HTML could barely handle a simple page layout. HTML5 can be used to write web applications that still work when you're not connected to the net; to tell websites where you are physically located; to handle high definition video; and to deliver extraordinary graphics.
CSS 3
CSS3 is the latest evolution of the Cascading Style Sheets language and aims at extending CSS2.1. It brings a lot of long-awaited novelties, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts. Experimental parts are vendor-prefixed and should either be avoided in production environments, or used with extreme caution as both their syntax and semantics can change in the future.
Javascript
JavaScript ® (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, and is best known as the scripting language for Web pages, but it's used in many non-browser environments as well. It is a prototype-based, multi-paradigm scripting language that is dynamic, and supports object-oriented, imperative, and functional programming styles.
Google Firebase
In short Firebase is platform which allow to build web and mobile applications without server side programming language. You can store users data on its real-time database which sync data among users data in no time. Firebase is a google product which offers so many useful features. Like Real time database, Push notification, Firebase Analytics, Firebase Authentication, Firebase Cloud Messaging, Firebase Storage, Firebase Hosting, Firebase Test Lab For Android, Firebase Crash reporting, Firebase Notification, Firebase App Indexing, Firebase Dynamic link, Firebase Invites, and Firebase Adwords.
