How to add css style to js

How to add css style in js: 1. Add style through "$("span").css("css attribute name", "attribute value")"; 2. Through "addClass()" Method to add css styles.

The operating environment of this article: windows7 system, jquery3.2.1&&css3 version, Dell G3 computer.

js adds css styles:

Since jquery supports css3, it is well compatible with many browsers, so it is better to use css styles through jquery.

• js add css style method

If the css style is undefined, you can call the element's css() method to add the style.

$("span").css("css属性名","属性值")

Example: Set the fonts labeled span to red

$("span").css("color","red")

If it is a defined css style, it can be added through the addClass() method, such as

<style type="text/css">
   .aa {
        border:1px solid red;
    }
</style>
  
$("#txtName").addClass("aa");
<input id="txtName"type="text"value="请输入你的姓名"/>

• How to operate css styles:

1、.css("样式")：获得样式值，比如$("input").css("color") 获得input中字体的颜色
2、.css("样式","value"):为样式赋值，如$("input").css("color","red");
3、.addClass("样式类1,样式类2,样式类3"):可以添加多个定义好的样式类
4、.hasClass("样式类类")：判断是否存在该样式
5、.toggleClass("样式类")：如果存在(不存在)就切换(删除)样式
6、.toggleClass("样式类",swith):如果swith为false，则删除样式，如果swith为true，则切换成该类
7、removeClass("样式类")：移除样式类
8、.css({样式名:"value",样式名:"value",样式名:"value"}):可以多次添加样式

Recommended study: "javascript Advanced Tutorial"

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