Accessing DOM elements using JavaScript

Great job on starting a new lesson! In the FAQ, test yourself by clicking the correct answer for each question. Then, click Next button at bottom right to continue.

Accessing DOM Elements Using JavaScript

Accessing DOM elements using JavaScript enables you to interact with specific elements on your web page. You can access DOM elements with their ID using JavaScript functions.

To access a DOM element in JavaScript based on its ID, you can use the getElementById function. This function takes the ID of the element as a parameter and returns the corresponding DOM element. By using JavaScript, you can access DOM elements by calling the appropriate functions and passing the ID of the element you want to access.

The DOM provides various functions and methods to find and access elements in JavaScript, making it convenient to manipulate the content and behavior of a web page dynamically.

Example: Accessing DOM Elements Using JavaScript

document.body = document.createElement('body');

var element = document.createElement('p');
element.textContent = 'Hi! This is a dynamically created element.';
element.id = 'example-id';
document.body.appendChild(element);

// JavaScript example for accessing DOM elements
var foundElement = document.getElementById('example-id');
console.log(foundElement); // Output: [object HTMLParagraphElement]

FAQ (Interview Questions and Answers)

1. How can you access DOM elements in JavaScript?
   By using functions like getElementsByClassName to find elements based on their class name.
   Accessing DOM elements is not possible with JavaScript.
   DOM elements can only be accessed using external JavaScript libraries.
   
2. How do you access a DOM element in JavaScript based on its ID?
   You can use the getElementById function.
   DOM elements cannot be accessed based on their ID using JavaScript.
   Accessing DOM elements by ID requires advanced JavaScript knowledge.
   
3. What functions can be used to access DOM elements in JavaScript?
   There are no specific functions available to access DOM elements in JavaScript.
   JavaScript provides functions like getElementById, getElementsByClassName, getElementsByTagName, querySelector, querySelectorAll and getElementsByName to access elements.
   Accessing DOM elements in JavaScript is only possible with external libraries.
   
4. Can you provide an example of accessing a DOM element using JavaScript?
   No, examples of accessing DOM elements using JavaScript are not available.
   Yes, you can use JavaScript's getElementById function to access an element based on its ID.
   Examples of accessing DOM elements are only provided in advanced JavaScript courses.
   
5. What is the purpose of accessing DOM elements using JavaScript?
   The purpose of accessing DOM elements using JavaScript is to manipulate their content and behavior dynamically.
   Accessing DOM elements with JavaScript has no specific purpose.
   Accessing DOM elements is only useful for performance optimization.
   

Your Total Score: 0 out of 5

Remember to just comment if you have any doubts or queries.

Where to learn JavaScript? Take the JavaScript course free in Software Testing Space.