1:- what is HTML?

Ans:-HTML stands for a hypertext markup language. it is a language used to create and structure content on the web.

2:-what is CSS?

Ans:-CSS stands for cascading style sheets. it is a style sheet language used to describe the look and formatting of a document written in HTML.it is used to define the styles of elements on a webpage, such as a font, size, color and layout of text and other elements.

3:-why js came into the picture?

Ans:-Because, before js was developed webpages were static and could not be changed by the user. so for responsive a webpage used js.

4:-history of js and Ecmascript?

Ans:-javascript was invented by Brendan Eich in 1995. it was developed for Netscape 2 and became the Ecma-262 standard in 1997. Initially, the name was known as LiveScript, but Netscape changed the name to javascript.