1.What is JavaScript? JavaScript is a client-side and server-side scripting language inserted into HTML pages and is understood by web browsers. JavaScript is also an Object-based Programming language 2.What are the key features of javascript? JavaScript is a scripting language. JavaScript is an interpreter-based scripting language. JavaScript is case-sensitive. JavaScript…

1.React JSX JSX stands for JavaScript XML.JSX allows us to write HTML in React JSX makes it easier to write and add HTML in React. You are not required to use JSX, but JSX makes it easier to write React applications. Let us demonstrate with two examples, the first uses JSX and…

1.String.trim() The trim() method removes whitespace from both sides of a string. var str = “ Hello World! “; alert(str.trim()); 2.String.slice() The slice() method extracts parts of a string and returns the extracted parts in a new string. let str = ‘The morning is upon us.’ str.slice(-3) // returns ‘us.’ str.slice(-3, -1) // returns…