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Jquery query the number of child elements: 1, use the children () function to get and return a collection of all child elements; 2, use the length attribute to get the number of all child elements in the element collection, the syntax is "parent element object .children (). Length".

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

How does jquery query the number of child elements

In jquery, you can query the number of child elements using the children () method and the length attribute attribute.

The children () function gets and returns a collection of all child elements

The length attribute gets the number of all child elements in the element collection

Implementation code:

$(document) .ready (function () {$("button") .click (function () {var res = $("div") .children () .length; alert ("number of child elements:" + res);}) })

Child element 1

Child element 2

Child element 3

There are several child elements in the div element

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