问题描述
我有一个页面上的内容,并通过我有一个是动画与CSS技巧吧一半。我想只播放动画时的技巧酒吧在视图中。
I have content on a page and half way through I have skill bars that are animated with CSS. I would like to play the animation only when the skill bars are in view.
我试着用js的,当我使用的一个技能栏,它的工作。如下图所示:
I tried using js and it worked when I used one skill bar. shown here: jsfiddle.net/pCgYe/6/
但是,当我增加了更多的酒吧,这完全停止工作。喜欢这里:
But when I added more bars, it stopped working completely. Like here: jsfiddle.net/pCgYe/7/
我知道我必须要添加一些JS的code,但我不知道到底是什么要补充。
I know I have to add something to the js code, but I am not sure exactly what to add.
function isElementInViewport(){
var scrollTop = $(window).scrollTop();
var viewportHeight = $(window).height();
$('.skiller #skill:not(.html5)').each(function(){
var top = $(this).offset().top;
console.log(top);
console.log(scrollTop + viewportHeight);
if(scrollTop + viewportHeight >= top ){
$(this).find('.expand').addClass('html5');
console.log(true);
}else{
console.log(false);
}
});
}
$(window).scroll(isElementInViewport);
如果任何人都可以请指导我在正确的方向。
If anyone can please guide me in the right direction.
感谢你们提前!
推荐答案
这是因为在你的5条版本,你已经添加CSS类直线距离,而不是通过programmtically的JavaScript。这意味着动画瞬间发生。
It's because in your 5 bar version you have already added the css classes straight away and not programmtically through the javascript. Meaning the animation happens instantly.
<div class="skiller col">
<ul id="skill">
<li><span class="expand html5"><small>%70</small></span><em>HTML
5</em></li>
<li><span class="expand css3"><small>%90</small></span><em>CSS
3</em></li>
<li><span class=
"expand jquery"><small>%50</small></span><em>jQuery</em></li>
<li><span class=
"expand photoshop"><small>%10</small></span><em>Photoshop</em></li>
<li><span class=
"expand dreamweaver"><small>%100</small></span><em>Dreamweaver</em></li>
</ul>
</div>
删除的类后扩大在每一行,并将它们添加在你的JavaScript就像你在一个酒吧做版。
我在工作中很不能做这个正确的版本,但尝试以下的javascript:
Remove the classes after expand on each line and add them in your javascript like you do in the one bar version.I'm at work so can't do a proper version of this but try the following javascript:
function isElementInViewport(){
var scrollTop = $(window).scrollTop();
var viewportHeight = $(window).height();
$('.skiller #skill:not(.html5)').each(function(){
var top = $(this).offset().top;
console.log(top);
console.log(scrollTop + viewportHeight);
if(scrollTop + viewportHeight >= top ){
$(this).find('.expand').addClass('html5');
$(this).find('.expand1').addClass('css3');
$(this).find('.expand2').addClass('jquery');
$(this).find('.expand3').addClass('photoshop');
$(this).find('.expand4').addClass('dreamweaver');
console.log(true);
}else{
console.log(false);
}
});
}
$(窗口).scroll(isElementInViewport);
$(window).scroll(isElementInViewport);
删除您在HTML已经添加了类之后,你还需要改变HTML扩展类,像这样:(注意:这是一个糟糕的实现,但请把它作为一个基础,大大提高)
After removing the classes you've added in the HTML you will also need to change the HTML expand classes, Like so: (NOTE: This is a bad implementation but please use it as a basis to greatly improve on).
<div class="skiller col">
<ul id="skill">
<li><span class="expand"><small>%70</small></span><em>HTML
5</em></li>
<li><span class="expand expand1"><small>%90</small></span><em>CSS
3</em></li>
<li><span class=
"expand expand2"><small>%50</small></span><em>jQuery</em></li>
<li><span class=
"expand expand3"><small>%10</small></span><em>Photoshop</em></li>
<li><span class=
"expand expand4"><small>%100</small></span><em>Dreamweaver</em></li>
</ul>
</div>
看看这个捣鼓它在行动工作:
重要提示:理想情况下你想使你的code可重复使用和可扩展。我的修复是做的非常hackish的方式,不采用最佳实践。这是确定的,如果你永远也不会再使用这一点,只需要得到它尽快完成,但我会建议你考虑在一个更为干干巴巴重建这一点。
这篇关于只玩CSS动画的时候了滚动的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!