JavaScript
What Is JavaScript
JavaScript (commonly abbreviated as JS) is a high-level, dynamic, interpreted programming language. It is one of the core technologies of the World Wide Web, alongside HTML and CSS. Over 97% of websites use JavaScript on the client side for webpage behavior.
CSS
What Is CSS
Cascading Style Sheets is a style sheet language used for specifying the presentation and styling of a document written in a markup language such as HTML or XML. CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.
HTML5
What Is HTML5
HTML5 is a markup language used for structuring and presenting hypertext documents on the World Wide Web. It was the fifth and final major HTML version that is now a retired World Wide Web Consortium recommendation. The current specification is known as the HTML Living Standard. Wikipedia