Modern Web Design with HTML5, CSS3, and JavaScript - Why Use jQuery?

The video tutorial introduces jQuery, highlighting its benefits like browser compatibility and easy DOM manipulation. It demonstrates how to select and style elements using jQuery, comparing it with JavaScript. The tutorial covers advanced selection techniques and explains how jQuery simplifies tasks that require more code in JavaScript.

What is one of the main advantages of using jQuery for DOM manipulation?

• It is less compatible with browsers.

• It requires more code than JavaScript.

• It does not support CSS selectors.

• It simplifies the selection and manipulation of multiple elements.

How does jQuery handle the selection of elements with a specific class?

• It selects elements randomly.

• It selects only the first matching element.

• It selects all matching elements and returns them in an array.

• It cannot select elements by class.

How does jQuery apply styles to multiple elements compared to JavaScript?

• jQuery requires a loop to apply styles to each element.

• jQuery applies styles to all selected elements without looping.

• JavaScript applies styles to all selected elements without looping.

• JavaScript and jQuery both require loops to apply styles.

What happens when you apply a style directly to an element using jQuery?

• The style is applied only if no CSS is present.

• The style is applied randomly.

• The style takes precedence over CSS styles.

• The style is ignored if CSS is present.

What is a key difference between jQuery and JavaScript when selecting elements?

• jQuery requires more lines of code than JavaScript.

• JavaScript automatically applies styles to all elements.

• jQuery returns elements in an array format, simplifying manipulation.

• JavaScript does not support CSS selectors.

Which method does JavaScript use to select a single element?

• getElementsByClassName

• querySelector

• getElementById

• querySelectorAll

When using jQuery to select an element by ID, what is the result?

• An error is thrown if more than one element matches.

• No elements are returned.

• A list of elements is always returned, even if only one matches.

• A single element is returned, not in an array.