Technologies using HTML, CSS, JavaScript and Php we can create dynamic website.Html stands for Hypertext markup language and is used to create content of the web page.Css Stands for Cascading style sheet is used to create the layout of the webpage.JavaScript is the programming language and is used to create dyanamic content of the webpage and using javascript is used to make conditional statement i.e using javascript we can use conditioanl and branching statement.Php is an acronym: Hypertext Preprocessor is used to create dynamic webpage.
Facebook used technologies such as front end as javascrit and Back end as Php.