jQuery .class class name selector

Specify the class name of the element to be selected

Said　 .class 　 The selector selects all elements with the specified class.

It is declared before a string of one or more characters with a dot (.)

class属性用于为多个HTML元素设置特定样式。

The class attribute is used to set specific styles for multiple HTML elements.

HTML elements can also refer to multiple classes (see the example below).Note:

Do not start the class attribute with a number. It may cause exceptions in some browsers.

Syntax:

Select all elements with multiple class names of "myclass" and "otherclass":

$(".class")

Example
　　Select all elements with the class "demo":-$(".myclass.otherclass").css("background
color", "yellow");

$(".demo").css("background

Example
　　Select all <p> elements with the class "demo":-$(".myclass.otherclass").css("background
color", "yellow");

$("p.demo").css("background

Example
　　$("document").ready(function(){-$(".myclass.otherclass").css("background
color", "yellow");

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Specify the class name of the element to be selected