Intro to JS: JS and the Browser

What does the acronym DOM stand for in web development?

• Document Object Model

• Data Object Model

• Document Oriented Model

• Data Oriented Model

Which HTML element is used to link a JavaScript file to an HTML document?

• <link>

• <script>

• <style>

• <meta>

In the context of JavaScript, what is the purpose of the `getElementById()` method?

• To create a new HTML element

• To access an HTML element by its class name

• To access an HTML element by its id attribute

• To delete an HTML element

Explain why JavaScript libraries like jQuery are used in web development.

• They make DOM manipulation and traversal easier

• They increase the complexity of web development

• They are required for all web applications

• They replace the need for HTML and CSS

How does JavaScript handle mathematical operations on strings obtained from form elements?

• It throws an error

• It converts strings to numbers automatically

• It ignores the operation

• It concatenates the strings

Consider a scenario where a web page uses a JavaScript library that is not fully utilized. What is a potential downside of this approach?

• It makes the code easier to maintain

• It increases the load time of the web page

• It ensures all functions are used

• It reduces the need for custom code

What is a potential advantage of using "vanilla" JavaScript over a library?

• It requires less initial knowledge

• It leads to faster, smaller, and easier-to-maintain code

• It automatically includes all necessary functions

• It is always more efficient than using a library

A paragraph is defined in HTML code.

<p id=“display”> </p>

What is the JavaScript code to change this paragraph?

• document.getElementById(“p").innerHTML = 'Hello World!’;

• document.getElementById("display").innerHTML = 'Hello World!’;

• display.innerHTML= 'Hello World!’;

• alert('Hello World!');