JavaScript Class Notes: DOM Elements

Updated: Jun 2

Mobiprep has created last-minute notes for all topics of JavaScript to help you with the revision of concepts for your university examinations. So let’s get started with the lecture notes on JavaScript.

  1. JavaScript: Introduction

  2. Data Types

  3. Variables

  4. Operators

  5. Functions

  6. Conditional Statements and Loops

  7. Arrays

  8. Objects

  9. DOM Elements

  10. Cookies

  11. Pop Up Box

  12. Exception Handling



Our team has curated a list of the most important questions asked in universities such as DU, DTU, VIT, SRM, IP, Pune University, Manipal University, and many more. The questions are created from the previous year's question papers of colleges and universities.

  1. What is DOM Programming Interface?

  2. Define DOM Methods.

  3. What is Event Handling?

  4. What is Event Bubbling?

JavaScript Notes: DOM Elements


Question 1. What is DOM Programming Interface?

The Document Object Model (DOM) connects web pages to scripts or programming languages by representing the structure of a document—such as the HTML representing a web page—in memory. Usually it refers to JavaScript, even though modeling HTML, SVG, or XML documents as objects are not part of the core JavaScript language.

 

Question 2. Define DOM Methods.

HTML DOM methods are actions you can perform (on HTML Elements).

 

Question 3. What is Event Handling?

Event Handling is a software routine that processes actions, such as keystrokes and mouse movements. It is the receipt of an event at some event handler from an event producer and subsequent processes.

 

Question 4. What is Event Bubbling?

While developing a webpage or a website via JavaScript, the concept of event bubbling is used where the event handlers are invoked when one element is nested on to the other element and are part of the same event. This technique or method is known as Event Bubbling. Thus, while performing event flow for a web page, event bubbling is used. We can understand event bubbling as a sequence of calling the event handlers when one element is nested in another element, and both the elements have registered listeners for the same event. So beginning from the deepest element to its parents covering all its ancestors on the way to top to bottom, calling is performed.

 



 

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