Подробное описание и демонстрацией работы эффекта загрузки под номером №21 для бибилиотеки Bootstrap. Html и CSS код для реализации preloader’a сайта как на изображении.
Демонстрация эффекта загрузки страницы — стиль 21
Loading
Wait
Please
<div class="container"> <div class="row"> <div class="col-md-12"> <div class="loader"> <div class="roll"></div> <div class="box"> <div class="loader-inner">Loading</div> <div class="loader-inner">Wait</div> <div class="loader-inner">Please</div> </div> </div> </div> </div> </div>css разметка для реализации эффекта загрузки тсраницы
.loader {
position: relative;
width: 120px;
height: 210px;
margin: 0 auto;
z-index: 1;
}
.loader .roll {
position: absolute;
width: 100px;
height: 60px;
background: #eee;
border-radius: 15% 0% 0% 15% / 50% 0% 0% 50%;
box-shadow: inset 0 0 1px rgba(0, 0, 0, 0.5), inset 0 5px 10px rgba(0, 0, 0, 0.3);
background-image: -webkit-linear-gradient(top, #eeeeee 0%, #eeeeee 49%, #bbbbbb 50%, #eeeeee 51%, #eeeeee 100%);
background-image: linear-gradient(to bottom, #eeeeee 0%, #eeeeee 49%, #bbbbbb 50%, #eeeeee 51%, #eeeeee 100%);
background-size: 100px 60px;
-webkit-animation: move-roll 1.66667s linear infinite;
animation: move-roll 1.66667s linear infinite;
}
.loader .roll:before {
position: absolute;
content: "";
z-index: 1;
height: 100%;
width: 20%;
right: -10%;
border-radius: 50%;
background-color: #eee;
-webkit-animation: anim-rollend 0.2s linear infinite;
animation: anim-rollend 0.2s linear infinite;
background-image: -webkit-radial-gradient(center ellipse, #eeeeee 0%, #eeeeee 4%, #bbbbbb 5%, #eeeeee 6%, #eeeeee 9%, #bbbbbb 10%, #eeeeee 11%, #eeeeee 14%, #bbbbbb 15%, #eeeeee 16%, #eeeeee 19%, #bbbbbb 20%, #eeeeee 21%, #eeeeee 24%, #bbbbbb 25%, #eeeeee 26%, #eeeeee 29%, #bbbbbb 30%, #eeeeee 31%, #eeeeee 34%, #bbbbbb 35%, #eeeeee 36%, #eeeeee 39%, #bbbbbb 40%, #eeeeee 41%, #eeeeee 44%, #bbbbbb 45%, #eeeeee 46%, #eeeeee 49%, #bbbbbb 50%, #eeeeee 51%, #eeeeee 54%, #bbbbbb 55%, #eeeeee 56%, #eeeeee 59%, #bbbbbb 60%, #eeeeee 61%, #eeeeee 64%, #bbbbbb 65%, #eeeeee 66%, #eeeeee 69%, #bbbbbb 70%, #eeeeee 71%, #eeeeee 74%, #bbbbbb 75%, #eeeeee 76%, #eeeeee 79%, #bbbbbb 80%, #eeeeee 81%, #eeeeee 84%, #bbbbbb 85%, #eeeeee 86%, #eeeeee 89%, #bbbbbb 90%, #eeeeee 91%, #eeeeee 94%, #bbbbbb 95%, #eeeeee 96%, #eeeeee 100%);
background-image: radial-gradient(ellipse at center, #eeeeee 0%, #eeeeee 4%, #bbbbbb 5%, #eeeeee 6%, #eeeeee 9%, #bbbbbb 10%, #eeeeee 11%, #eeeeee 14%, #bbbbbb 15%, #eeeeee 16%, #eeeeee 19%, #bbbbbb 20%, #eeeeee 21%, #eeeeee 24%, #bbbbbb 25%, #eeeeee 26%, #eeeeee 29%, #bbbbbb 30%, #eeeeee 31%, #eeeeee 34%, #bbbbbb 35%, #eeeeee 36%, #eeeeee 39%, #bbbbbb 40%, #eeeeee 41%, #eeeeee 44%, #bbbbbb 45%, #eeeeee 46%, #eeeeee 49%, #bbbbbb 50%, #eeeeee 51%, #eeeeee 54%, #bbbbbb 55%, #eeeeee 56%, #eeeeee 59%, #bbbbbb 60%, #eeeeee 61%, #eeeeee 64%, #bbbbbb 65%, #eeeeee 66%, #eeeeee 69%, #bbbbbb 70%, #eeeeee 71%, #eeeeee 74%, #bbbbbb 75%, #eeeeee 76%, #eeeeee 79%, #bbbbbb 80%, #eeeeee 81%, #eeeeee 84%, #bbbbbb 85%, #eeeeee 86%, #eeeeee 89%, #bbbbbb 90%, #eeeeee 91%, #eeeeee 94%, #bbbbbb 95%, #eeeeee 96%, #eeeeee 100%);
background-repeat: no-repeat;
box-shadow: inset 0 0 1px rgba(0, 0, 0, 0.5);
}
.loader .roll:after {
position: absolute;
content: "";
z-index: 1;
height: 40%;
width: 8%;
top: 30%;
right: -4%;
border-radius: 50%;
background: black;
box-shadow: inset 0 0 1px rgba(0, 0, 0, 0.5);
}
.loader .box {
position: relative;
z-index: -1;
width: 100px;
height: 180px;
top: 30px;
left: 10px;
overflow: hidden;
}
.loader .box:after {
position: absolute;
content: "";
width: 100%;
height: 33%;
box-shadow: inset 0 30px 10px rgba(0, 0, 0, 0.2);
}
.loader .box .loader-inner {
position: absolute;
width: 100px;
height: 60px;
background-color: #eee;
box-shadow: inset 0 0 1px rgba(0, 0, 0, 0.5);
text-align: center;
font: bold 15px/60px 'Roboto';
color: #bbb;
text-shadow: -1px -1px 1px rgba(255, 255, 255, 0.4), 1px 1px 1px rgba(0, 0, 0, 0.4);
-webkit-animation: move-paper 2s linear infinite;
animation: move-paper 2s linear infinite;
}
.loader .box .loader-inner:nth-of-type(2) {
-webkit-animation-delay: -0.66667s;
animation-delay: -0.66667s;
}
.loader .box .loader-inner:nth-of-type(3) {
-webkit-animation-delay: -1.33333s;
animation-delay: -1.33333s;
}
@-webkit-keyframes move-paper {
0% {
opacity: 1;
-webkit-transform: translateY(-60px);
transform: translateY(-60px);
}
50% {
-webkit-transform: translateY(20px);
transform: translateY(20px);
}
75% {
opacity: 1;
}
100% {
opacity: 0;
-webkit-transform: translateY(120px);
transform: translateY(120px);
}
}
@keyframes move-paper {
0% {
opacity: 1;
-webkit-transform: translateY(-60px);
transform: translateY(-60px);
}
50% {
-webkit-transform: translateY(20px);
transform: translateY(20px);
}
75% {
opacity: 1;
}
100% {
opacity: 0;
-webkit-transform: translateY(120px);
transform: translateY(120px);
}
}
@-webkit-keyframes move-roll {
0% {
background-position: 0px 120px;
}
100% {
background-position: 0px 0px;
}
}
@keyframes move-roll {
0% {
background-position: 0px 120px;
}
100% {
background-position: 0px 0px;
}
}
@-webkit-keyframes anim-rollend {
0% {
background-size: 100% 100%;
background-position: 0 0;
}
50% {
background-size: 98% 98%;
background-position: 1px 1px;
}
}
@keyframes anim-rollend {
0% {
background-size: 100% 100%;
background-position: 0 0;
}
50% {
background-size: 98% 98%;
background-position: 1px 1px;
}
}