Ответ 1
Хитрость заключается в том, чтобы сначала выполнить анимацию, чтобы скрыть все элементы (при загрузке страницы), и связать ее с анимацией, которая покажет элементы. Это рабочий пример для вас в PURE CSS & HTML:
div.slideIn {
position: absolute;
top: 200px;
width: 100px;
height: 100px;
border: 1px solid black;
animation-name: hide, slideIn;
animation-duration: 5s;
animation-timing-function: ease-in;
animation-iteration-count: 1;
-moz-animation-name: hide, slideIn;
-moz-animation-duration: 5s;
-moz-animation-timing-function: ease-in;
-moz-animation-iteration-count: 1;
-webkit-animation-name: hide, slideIn;
-webkit-animation-duration: 5s;
-webkit-animation-timing-function: ease-in;
-webkit-animation-iteration-count: 1;
-o-animation-name: hide, slideIn;
-o-animation-duration: 5s;
-o-animation-timing-function: ease-in;
-o-animation-iteration-count: 1;
opacity: 1;
}
div.slideIn.first {
left: 50px;
animation-delay: 0s, 0s;
-moz-animation-delay: 0s, 0s;
-webkit-animation-delay: 0s, 0s;
-o-animation-delay: 0s, 0s;
}
div.slideIn.second {
left: 150px;
animation-delay: 0s, 2s;
-moz-animation-delay: 0s, 2s;
-webkit-animation-delay: 0s, 2s;
-o-animation-delay: 0s, 2s;
}
div.slideIn.third {
left: 250px;
animation-delay: 0s, 4s;
-moz-animation-delay: 0s, 4s;
-webkit-animation-delay: 0s, 4s;
-o-animation-delay: 0s, 4s;
}
@keyframes hide
{
from { opacity: 0; } to { opacity: 0 }
}
@-moz-keyframes hide
{
from { opacity: 0; } to { opacity: 0 }
}
@-webkit-keyframes hide
{
from { opacity: 0; } to { opacity: 0 }
}
@-o-keyframes hide
{
from { opacity: 0; } to { opacity: 0 }
}
@keyframes slideIn
{
0% { opacity: 0; top: -100px; }
1% { opacity: 1; top: -100px; }
100% { opacity: 1; top: 200px; }
}
@-moz-keyframes slideIn
{
0% { opacity: 0; top: -100px; }
1% { opacity: 1; top: -100px; }
100% { opacity: 1; top: 200px; }
}
@-webkit-keyframes slideIn
{
0% { opacity: 0; top: -100px; }
1% { opacity: 1; top: -100px; }
100% { opacity: 1; top: 200px; }
}
@-o-keyframes slideIn
{
0% { opacity: 0; top: -100px; }
1% { opacity: 1; top: -100px; }
100% { opacity: 1; top: 200px; }
}
]
<div class="slideIn first">I slid in</div>
<div class="slideIn second">I'm 2nd</div>
<div class="slideIn third">I'm 3rd</div>