Home > Developer > JavaScript

Solve the problem that jQuery cannot implement Background Image Positioning animation in FireFox.

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

In general, the method to implement the positioning animation of the background image is very simple and compatible with various iyjt:
1
$ (Elem). animate ({backgroundPositionX: '-39px', backgroundPositionY: '-39px'}, 500 );
However, Firefox does not support this method. After searching by Google for half a day, I finally found a solution, that is, the $. fx. step Method of jQuery extension:

01
(Function ($ ){
02
$. Extend ($. fx. step ,{
03
BackgroundPosition: function (fx ){
04
If (fx. state ===0 & typeof fx. end = 'string '){
05
Var start = $. curCSS (fx. elem, 'backgroundposition ');
06
Start = toArray (start );
07
Fx. start = [start [0], start [2];
08
Var end = toArray (fx. end );
09
Fx. end = [end [0], end [2];
10
Fx. unit = [end [1], end [3];
11
}
12
Var nowPosX = [];
13
NowPosX [0] = (fx. end [0]-fx. start [0]) * fx. pos) + fx. start [0] + fx. unit [0];
14
NowPosX [1] = (fx. end [1]-fx. start [1]) * fx. pos) + fx. start [1] + fx. unit [1];
15
Fx. elem. style. backgroundPosition = nowPosX [0] + ''+ nowPosX [1];
16
 
17
Function toArray (strg ){
18
Strg = strg. replace (/left | top/g, '0px ');
19
Strg = strg. replace (/right | bottom/g, '000000 ');
20
Strg = strg. replace (/([0-9 \.] +) (\ s | \) | $)/g, "$ 1px $2 ");
21
Var res = strg. match (/(-? [0-9 \.] +) (px | \ % | em | pt) \ s (-? [0-9 \.] +) (px | \ % | em | pt )/);
22
Return [parseFloat (res [1], 10), res [2], parseFloat (res [3], 10), res [4];
23
}
24
}
25
});
26
}) (JQuery );
Usage:
1
$ (Elem). animate ({backgroundPosition: '(0-39px)'}, 500 );
Source of this method:
Article: http://snook.ca/archives/javascript/jquery-bg-image-animations/
Example: http://snook.ca/technical/jquery-bg/

A complete example is attached:
 
01
<! DOCTYPE html>
02
<Html>
03
<Head>
04
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
05
<Meta name = "author" content = "pandao QQ: 272383090"/>
06
<Title> jQuery Background Image Positioning animation (which can solve the problem that FF does not support) </title>
07
<Style type = "text/css">
08
* {Margin: 0; padding: 0 ;}
09
Body {font-size: 14px; color: #444; font-family: "", Arial; background: # fff ;}
10
Img {border: none; vertical-align: middle ;}
11
# Test {width: 200px; height: 50px; margin: 100px auto; border: 3px solid red; padding: 10px; cursor: pointer; background: # fff url (http://www.bkjia.com/uploadfile/2012/0814/20120814094115952.png) no-repeat left top ;}
12
</Style>
13
</Head>
14
<Body>
15
<Div id = "test"> TEST </div>
16
<Script type = "text/javascript" src = "http://code.jquery.com/jquery-1.7.1.min.js"> </script>
17
<Script type = "text/javascript">
18
(Function ($ ){
19
$. Extend ($. fx. step ,{
20
BackgroundPosition: function (fx ){
21
If (fx. state ===0 & typeof fx. end = 'string '){
22
Var start = $. curCSS (fx. elem, 'backgroundposition ');
23
Start = toArray (start );
24
Fx. start = [start [0], start [2];
25
Var end = toArray (fx. end );
26
Fx. end = [end [0], end [2];
27
Fx. unit = [end [1], end [3];
28
}
29
Var nowPosX = [];
30
NowPosX [0] = (fx. end [0]-fx. start [0]) * fx. pos) + fx. start [0] + fx. unit [0];
31
NowPosX [1] = (fx. end [1]-fx. start [1]) * fx. pos) + fx. start [1] + fx. unit [1];
32
Fx. elem. style. backgroundPosition = nowPosX [0] + ''+ nowPosX [1];
33
 
34
Function toArray (strg ){
35
Strg = strg. replace (/left | top/g, '0px ');
36
Strg = strg. replace (/right | bottom/g, '000000 ');
37
Strg = strg. replace (/([0-9 \.] +) (\ s | \) | $)/g, "$ 1px $2 ");
38
Var res = strg. match (/(-? [0-9 \.] +) (px | \ % | em | pt) \ s (-? [0-9 \.] +) (px | \ % | em | pt )/);
39
Return [parseFloat (res [1], 10), res [2], parseFloat (res [3], 10), res [4];
40
}
41
}
42
});
43
}) (JQuery );
44
 
45
// Usage
46
$ (Function (){
47
// It doesn't matter if css is added or not.
48 www.2cto.com
Certificate ('{test'}.css ({backgroundPosition: "0 0"}). hover (function (){
49
$ (This). animate ({backgroundPosition: "(0-250px)" },{ duration: 500 });
50
}, Function (){
51
$ (This). animate ({backgroundPosition: "(0 0)" },{ duration: 500 });
52
});
53
});
54
</Script>
55
</Body>
56
</Html>


Author: pandao

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
jquery change background image every 5 seconds image fade in fade out jquery jquery validation for image upload in php how to scroll background image in css implement background process shell c lastpass firefox problem how to put background image in php
Related Article
JavaScript solution to the eight Queens Problem method summar...
The difference between single and double quotes in JavaScript...

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More