我在div中使用jQuery函数作为视差背景。
当页面加载时,我有一些动画背景的css webkit动画。
然而,在页面加载完成后,我的jQuery函数动画后台的视差效果不起作用。
这是我的代码:
$(document).ready(function(){
$('#square').mousemove(function(e) {
var x = -(e.pageX + this.offsetLeft) / 4;
var y = -(e.pageY + this.offsetTop) / 4;
$(this).css('background-position', x + 'px ' + y + 'px');
});
});
#square { height: 700px;
width: 500px;
display: inline-block;
margin-left: 100px;
position: absolute;
right: 37%;
top: 15%;
background: transparent;
-webkit-animation-name: image-fadein;
-webkit-animation-delay: .8s;
-webkit-animation-duration: 1s;
-webkit-animation-iteration-count: 1;
-webkit-animation-timing-function: ease-in-out;
-webkit-animation-fill-mode: forwards;
@-webkit-keyframes image-fadein {
0% { background: transparent; }
25% { background: #f2efef; }
50% { background: #333; }
100% { background-image: url(https://destinyguides.files.wordpress.com/2014/08/destiny-wallpaper-3.jpg);
background-size: cover no-repeat;
background-position: 35% 30%; }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script>
<div id="square">
<span class="l1"></span>
<span class="l2"></span>
<span class="l3"></span>
<span class="l4"></span>
</div>
我应该提一下,当我从div元素中完全删除webkit动画时,jQuery函数可以工作,只留下高度,宽度,显示,边距,位置和背景。
有谁知道为什么webkit动画似乎干扰了jQuery代码?
答案 0 :(得分:1)
这是因为使用关键帧规则设置动画的属性不能被内联css规则覆盖,或者至少不能被我测试过的任何方法覆盖。
你可以
$(document).ready(function(){
$('#square').mousemove(function(e) {
var x = -(e.pageX + this.offsetLeft) / 4;
var y = -(e.pageY + this.offsetTop) / 4;
$(this).css("background-position",x + 'px ' + y + 'px');
}).on("animationend",function(e){
//You can access animation-name value by
//e.originalEvent.animationName
$(this).removeClass("animated").css({
backgroundImage:"url(https://destinyguides.files.wordpress.com/2014/08/destiny-wallpaper-3.jpg)",
backgroundSize: 'cover no-repeat',
backgroundPosition: '35% 30%'
});
});
});
&#13;
#square {
width: 80%;
height:100%;
position: absolute;
top: 0px;
left:0px;
background: transparent;
}
.animated {
-webkit-animation-name: image-fadein;
-webkit-animation-delay: .8s;
-webkit-animation-duration: 1s;
-webkit-animation-iteration-count: 1;
-webkit-animation-timing-function: ease-in-out;
-webkit-animation-fill-mode: forwards;
}
@-webkit-keyframes image-fadein {
0% { background: transparent; }
25% { background: #f2efef; }
50% { background: #333; }
100% { background-image: url(https://destinyguides.files.wordpress.com/2014/08/destiny-wallpaper-3.jpg);
background-size: cover no-repeat;
background-position: 35% 30%; }
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="square" class="animated">
<span class="l1"></span>
<span class="l2"></span>
<span class="l3"></span>
<span class="l4"></span>
</div>
&#13;
您还可以遍历styleSheets集合以查找keyframes rule(&#34; image-fadein&#34;),从那里找到最后一个关键帧规则(&#34; 100%&#34; ),并从那里修改样式。
演示
$(document).ready(function(){
var KFSRule = findKFSRule("image-fadein");
var KFRule = KFSRule && KFSRule.findRule("100%");
$('#square').mousemove(function(e) {
var x = -(e.pageX + this.offsetLeft) / 4;
var y = -(e.pageY + this.offsetTop) / 4;
if(KFRule){
KFRule.style.backgroundPosition = x + 'px ' + y + 'px';
}
});
});
function findKFSRule(ruleName) {
var foundRule = null;
var sheets = [].slice.call(document.styleSheets);
sheets.forEach(function(sheet){
var rules = [].slice.call(sheet.cssRules);
rules.forEach(function(rule){
if(rule.type == CSSRule.WEBKIT_KEYFRAMES_RULE && rule.name==ruleName){
foundRule = rule;
}
});
});
return foundRule;
}
&#13;
#square {
width: 80%;
height:100%;
position: absolute;
top: 0px;
left:0px;
background: transparent;
-webkit-animation-name: image-fadein;
-webkit-animation-delay: .8s;
-webkit-animation-duration: 1s;
-webkit-animation-iteration-count: 1;
-webkit-animation-timing-function: ease-in-out;
-webkit-animation-fill-mode: forwards;
}
@-webkit-keyframes image-fadein {
0% { background: transparent; }
25% { background: #f2efef; }
50% { background: #333; }
100% { background-image: url(https://destinyguides.files.wordpress.com/2014/08/destiny-wallpaper-3.jpg);
background-size: cover no-repeat;
background-position: 35% 30%; }
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="square">
<span class="l1"></span>
<span class="l2"></span>
<span class="l3"></span>
<span class="l4"></span>
</div>
&#13;
请注意,如果它是外部样式表,则无法迭代样式表css规则。因此,您的样式必须嵌入页面中,即<style></style>
如果您需要在外部样式表中定义它们,您可能需要找到另一种利用CSSStyleSheet.deleteRule,CSSStyleSheet.insertRule或其他方法的工作。