Question

Look at the following jQuery selector: $("div #intro .head"). What does it
select?
All elements with class="head" inside the first div element with id="intro"
✓ O All div elements with id="intro" or class="head"
None of these
The first element with id="head" inside any div element with class="intro"​

Answer 1

Answer:

all div elements with I'd="intro" or class="head"

Answer 2

It select All elements with class=”head” inside the first div element with id=”intro” (option a is the correct answer)

• The following jQuery selector: $("div #intro .head").
• Elements or groups of elements in the Document Object Model can be accessed fast and efficiently thanks to the jQuery library, which makes use of CSS (Cascading Style Sheets) selectors (DOM).

• A jQuery selector is a function that applies expressions to a DOM to locate elements that match the specified criteria. Selectors, to put it simply, are used with jQuery to pick one or more HTML components. We can carry out a number of operations on a selected element after it has been chosen. Elements or groups of elements in the Document Object Model can be accessed fast and efficiently thanks to the jQuery library, which makes use of CSS (Cascading Style Sheets) selectors (DOM).

• The $() factory function:

The jQuery selectors start with the dollar sign and parentheses − $().

Represents a tag name available in the DOM. For example $('div') selects all elemetns of <div> in the document.

$("div") selector selects all div elements on any web page.

Hence, It select All elements with class=”head” inside the first div element with id=”intro”

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