What is the root element in an HTML document?

Who developed Node.js?

Which method joins all elements of an array into a string?

How can we implement state in Functional Components?

What is used to bind AngularJS expressions with AngularJS data?

What are the two incompatible versions of Yahoo User Interface (YUI)?

 The _________method returns the index of the last occurrence of a specified text in a string.

for(var m in n)

   console.log(n[m]);

What is the JavaScript code snippet to update the content of a timestamp element when the user clicks on it?

What will be the firstname and surname of the following JavaScript code?

var book = {
             "main title": "JavaScript",
             'sub-title': "The Definitive Guide",
             "for": "all audiences",
             author: {
                        firstname: "David",
                        surname: "Flanagan"
                     }
          };