jQuery中的背景位置动画无法在Firefox中使用 [英] Background Position animation in jQuery not working in Firefox
问题描述
我正在这里的一个wesbsite上工作: http://www.benjaminpotter.org/portfolio2/
I am working on a wesbsite here: http://www.benjaminpotter.org/portfolio2/
看看加载时的情况,它看起来不错,但是在Firefox中却不是。您知道为什么在jquery中设置动画的背景位置在Firefox中不起作用吗?看看与它关联的脚本animate 此处。
Look at the loading splash, it looks all good but not in Firefox. Do you know why background positions being animated in jquery don't work in Firefox? Have a look at the script attached to it called animate here.
推荐答案
如 dzejkej 所述,背景位置的单独值不是标准的一部分,Firefox也不支持。如 jQuery animate()
页面所述:
As noted by dzejkej, separate values for background-position are not part of the standard and not supported by Firefox. As noted on the jQuery animate()
page:
所有动画属性均应设置为单个数值
All animated properties should be animated to a single numeric value
这意味着背景位置
不符合条件,因为它需要两个值x pos和y pos。
And that means that background-position
doesn't qualify, as it requires two values, x pos and y pos.
您将必须使用动画插件。不幸的是,目前jQuery插件站点已关闭,因此我在此处提供了可在Firefox中使用的版本:
You will have to use an animation plugin. Unfortunately, at the moment the jQuery plugins site is down, so I have provided a version that works in Firefox here:
/** jquery.bgpos.js
* @author Alexander Farkas
* v. 1.02
*/
(function($) {
$.extend($.fx.step,{
backgroundPosition: function(fx) {
if (fx.state === 0 && typeof fx.end == 'string') {
var start = $.curCSS(fx.elem,'backgroundPosition');
start = toArray(start);
fx.start = [start[0],start[2]];
var end = toArray(fx.end);
fx.end = [end[0],end[2]];
fx.unit = [end[1],end[3]];
}
var nowPosX = [];
nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];
fx.elem.style.backgroundPosition = nowPosX[0]+' '+nowPosX[1];
function toArray(strg){
strg = strg.replace(/left|top/g,'0px');
strg = strg.replace(/right|bottom/g,'100%');
strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g,"$1px$2");
var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
return [parseFloat(res[1],10),res[2],parseFloat(res[3],10),res[4]];
}
}
});
})(jQuery);
请参阅此页面以供使用。
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