Query - Utilities

Size and position methods in Query allow you to get information about element dimensions, scroll positions, and their position in the DOM.

count

Get the number of elements in the Query object.

Count Usage - count() is preferred although the Query object is array-like and length will also work. If it’s really important to you — you can still do that.

Syntax

$('selector').count()

Returns

number - The number of elements in the Query object.

Usage

const paragraphCount = $('p').count();
console.log(`There are ${paragraphCount} paragraphs on the page.`);

index

Get the index of an element in the set of matched elements.

DOM Position - index() is useful for determining the position of an element among its siblings.

Syntax

$('selector').index()

Returns

number - The index of the first element within the Query object relative to its sibling elements, or -1 if not found.

Usage

const index = $('li.active').index();
console.log(`The active list item is at index ${index}`);

offsetParent

Get the closest positioned ancestor element.

Edge-Case Improvements - offsetParent() handles some [edge cases}(https://issues.chromium.org/issues/41131675) that prevent the naive use of el.offsetParent

Syntax

$('selector').offsetParent(options)

Parameters

Returns

Query object containing the offset parent element(s).

Usage

const offsetParent = $('.child-element').offsetParent();
console.log('Offset parent:', offsetParent.get(0));