[英]CSS animation : move a div with the new position relative to the previous
for better performance, I want replace: 为了更好的性能,我想要替换:
$('#foo').animate({ left: '+=42px' }, 500);
by a transition (or animation) CSS3. 通过过渡(或动画)CSS3。 But how can we do to implement "+=" on left property in CSS?
但是我们如何才能在CSS中的左侧属性上实现“+ =”?
How move a div with the new left position relative to the previous? 如何使用相对于前一个的新左侧位置移动div?
thx. 谢谢。
In vanilla-js you can't use +=
, but you can get the old value instead: 在vanilla-js中你不能使用
+=
,但你可以得到旧值:
document.getElementById('foo').onclick = function() { this.style.left = parseFloat(getComputedStyle(this).left) + 42 + 'px'; };
#foo { position: relative; left: 0; transition: 2s left; }
<div id="foo">Click me multiple times</div>
You can use the transition for smooth animation. 您可以使用过渡进行平滑动画。 you just put transition settings in the CSS of an element like this,
你只需将转换设置放在这样的元素的CSS中,
#foo {
-webkit-transition: all 0.5s ease-out;
-o-transition: all 0.5s ease-out;
-moz-transition: all 0.5s ease-out;
transition: all 0.5s ease-out
}
Then do your incrementation of left with script like this. 然后用这样的脚本来增加左边的增量。
$('#foo').css('left', '+=42px');
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