jQuery 入门教程(17): 读写HTML元素的css 属性

た入场券 2023-10-16 19:06 51阅读 0赞

jQuery 的css()方法用来设置或读取HTML元素的css属性。  
读取元素的CSS语法语法如下：  
css(“ propertyname “);

比如下面代码取得第一个<p>元素的背景颜色。

**\[javascript\]** [ view plain][view plain] [copy][view plain] [print][view plain] [?][view plain]

1.  $("p").css("background-color");

$("p").css("background-color");

使用下面的语法来设置HTML元素的CSS属性：

css(“propertyname“,”value“);

例如，下面代码为所有<p>元素设置背景色为黄色。

**\[html\]** [ view plain][view plain] [copy][view plain] [print][view plain] [?][view plain]

1.  <!DOCTYPE html>
2.  <html>
3.  <head>
4.  <meta charset="utf-8">
5.  <title>JQuery Demo</title>
6.  <script src="scripts/jquery-1.9.1.js"></script>
7.  <script>
8.  $(document).ready(function () \{
9.  $("button").click(function () \{
10. $("p").css("background-color", "yellow");
11. \});
12. \});
13. </script>
14. </head>
15. 
16. <body>
17. <h2>This is a heading</h2>
18. <p style="background-color: \#ff0000">This is a paragraph.</p>
19. <p style="background-color: \#00ff00">This is a paragraph.</p>
20. <p style="background-color: \#0000ff">This is a paragraph.</p>
21. <p>This is a paragraph.</p>
22. <button>Set background-color of p</button>
23. </body>
24. </html>

<!DOCTYPE html>
    <html>
    <head>
        <meta charset="utf-8">
        <title>JQuery Demo</title>
        <script src="scripts/jquery-1.9.1.js"></script>
        <script>
            $(document).ready(function () {
                $("button").click(function () {
                    $("p").css("background-color", "yellow");
                });
            });
        </script>
    </head>
    
    <body>
        <h2>This is a heading</h2>
        <p style="background-color: #ff0000">This is a paragraph.</p>
        <p style="background-color: #00ff00">This is a paragraph.</p>
        <p style="background-color: #0000ff">This is a paragraph.</p>
        <p>This is a paragraph.</p>
        <button>Set background-color of p</button>
    </body>
    </html>

[![20130309008][]][20130309008]  
css()也支持同时多个CSS属性：其语法如下：  
css(\{“ propertyname “:” value “,” propertyname “:” value “,…\});  
比如：

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1.  $("p").css(\{ "background-color":"yellow","font-size":"200%"\});

[view plain]: http://blog.csdn.net/mapdigit/article/details/8680231#
[20130309008]: http://www.imobilebbs.com/wordpress/wp-content/uploads/2013/03/20130309008.png