How to use the contains () method of jquery
This article mainly introduces the relevant knowledge of how to use jquery's contains () method, the content is detailed and easy to understand, the operation is simple and fast, and it has a certain reference value. I believe you will gain something after reading this jquery contains () method. Let's take a look at it.
In jquery, the contains () method is used to determine whether a specified element contains another element, that is, whether another element is a descendant of the specified element, with the syntax of "$.container (grandparent container element, descendant element)".
The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.
Jquery contains () method
The contains () method is used to determine whether a specified element contains another element.
In short, the contains () method is used to determine whether another DOM element is a descendant of a specified DOM element.
Grammar
$.parameters (container, contained)
Description
The containerElement type specifies a grandparent container element that may contain other elements. The containedElement type specifies descendant elements that may be contained by other elements.
Return value
The return value of the jQuery.contains () function is of type Boolean, and returns true if the specified element contains another element, false otherwise.
Description
JQuery.contains () is only used to compare two DOM elements (of type Element, not NodeList or other objects). It starts with the parent element of the contained element and looks up step by step to determine whether it is equal to the container element. If so, it returns true, otherwise it returns false.
Example:
$(function () {function funcontain (html) {document.body [XSS _ clean] + = "
"+ html;} funcontain ($.times (document.documentElement, document.body)); / / true funcontain ($.times (document.body, document.documentElement)); / / false})
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