fakeLoader.js-针对WebApp中的 “假”预加载

在做移动端网站的时候，前端有时候需要一些过渡效果，当然我们肯定首先想到肯定是用css3做一个过渡动画，nice，那我给大家一个好用的jQuery插件吧，让你三行代码实现这种过渡动画效果。

1.由于该插件js代码并不多，我贴出来一看究竟:

　　fakeLoader.js : 

　　

(function(b) {
b.fn.fakeLoader = function(m) {
var f = b.extend({
timeToHide: 1200,
pos: "fixed",
top: "0px",
left: "0px",
"100%",
height: "100%",
zIndex: "999",
bgColor: "#2ecc71",
spinner: "spinner7",
imagePath: ""
}, m);
var l = '<div class="fl spinner1"><div class="double-bounce1"></div><div class="double-bounce2"></div></div>';
var k = '<div class="fl spinner2"><div class="spinner-container container1"><div class="circle1"></div><div class="circle2"></div><div class="circle3"></div><div class="circle4"></div></div><div class="spinner-container container2"><div class="circle1"></div><div class="circle2"></div><div class="circle3"></div><div class="circle4"></div></div><div class="spinner-container container3"><div class="circle1"></div><div class="circle2"></div><div class="circle3"></div><div class="circle4"></div></div></div>';
var j = '<div class="fl spinner3"><div class="dot1"></div><div class="dot2"></div></div>';
var i = '<div class="fl spinner4"></div>';
var h = '<div class="fl spinner5"><div class="cube1"></div><div class="cube2"></div></div>';
var g = '<div class="fl spinner6"><div class="rect1"></div><div class="rect2"></div><div class="rect3"></div><div class="rect4"></div><div class="rect5"></div></div>';
var e = '<div class="fl spinner7"><div class="circ1"></div><div class="circ2"></div><div class="circ3"></div><div class="circ4"></div></div>';
var d = b(this);
var c = {
position: f.pos,
f.width,
height: f.height,
top: f.top,
left: f.left
};
d.css(c);
d.each(function() {
var n = f.spinner;
switch (n) {
case "spinner1":
d.html(l);
break;
case "spinner2":
d.html(k);
break;
case "spinner3":
d.html(j);
break;
case "spinner4":
d.html(i);
break;
case "spinner5":
d.html(h);
break;
case "spinner6":
d.html(g);
break;
case "spinner7":
d.html(e);
break;
default:
d.html(l)
}
if (f.imagePath != "") {
d.html('<div class="fl"><img src="' + f.imagePath + '"></div>');
a()
}
});
setTimeout(function() {
b(d).fadeOut()
}, f.timeToHide);
return this.css({
backgroundColor: f.bgColor,
zIndex: f.zIndex
})
};

function a() {
var c = b(window).width();
var e = b(window).height();
var d = b(".fl").outerWidth();
var f = b(".fl").outerHeight();
b(".fl").css({
position: "absolute",
left: (c / 2) - (d / 2),
top: (e / 2) - (f / 2)
})
}
b(window).load(function() {
a();
b(window).resize(function() {
a()
})
})
}(jQuery));

这里我将插件的7种预定义动画都特别加粗标注.

接下来在来悄悄CSS代码 : 

　　fakeLoader.css : 

.spinner1 {
40px;
height: 40px;
position: relative;
}

.double-bounce1, .double-bounce2 {
100%;
height: 100%;
border-radius: 50%;
background-color: #fff;
opacity: 0.6;
position: absolute;
top: 0;
left: 0;

-webkit-animation: bounce 2.0s infinite ease-in-out;
animation: bounce 2.0s infinite ease-in-out;
}

.double-bounce2 {
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}

@-webkit-keyframes bounce {
0%, 100% { -webkit-transform: scale(0.0) }
50% { -webkit-transform: scale(1.0) }
}

@keyframes bounce {
0%, 100% {
transform: scale(0.0);
-webkit-transform: scale(0.0);
} 50% {
transform: scale(1.0);
-webkit-transform: scale(1.0);
}
}

.spinner2 {
40px;
height: 40px;
position: relative;
}

.container1 > div, .container2 > div, .container3 > div {
6px;
height: 6px;
background-color: #fff;

border-radius: 100%;
position: absolute;
-webkit-animation: bouncedelay 1.2s infinite ease-in-out;
animation: bouncedelay 1.2s infinite ease-in-out;
/* Prevent first frame from flickering when animation starts */
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
}

.spinner2 .spinner-container {
position: absolute;
100%;
height: 100%;
}

.container2 {
-webkit-transform: rotateZ(45deg);
transform: rotateZ(45deg);
}

.container3 {
-webkit-transform: rotateZ(90deg);
transform: rotateZ(90deg);
}

.circle1 { top: 0; left: 0; }
.circle2 { top: 0; right: 0; }
.circle3 { right: 0; bottom: 0; }
.circle4 { left: 0; bottom: 0; }

.container2 .circle1 {
-webkit-animation-delay: -1.1s;
animation-delay: -1.1s;
}

.container3 .circle1 {
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}

.container1 .circle2 {
-webkit-animation-delay: -0.9s;
animation-delay: -0.9s;
}

.container2 .circle2 {
-webkit-animation-delay: -0.8s;
animation-delay: -0.8s;
}

.container3 .circle2 {
-webkit-animation-delay: -0.7s;
animation-delay: -0.7s;
}

.container1 .circle3 {
-webkit-animation-delay: -0.6s;
animation-delay: -0.6s;
}

.container2 .circle3 {
-webkit-animation-delay: -0.5s;
animation-delay: -0.5s;
}

.container3 .circle3 {
-webkit-animation-delay: -0.4s;
animation-delay: -0.4s;
}

.container1 .circle4 {
-webkit-animation-delay: -0.3s;
animation-delay: -0.3s;
}

.container2 .circle4 {
-webkit-animation-delay: -0.2s;
animation-delay: -0.2s;
}

.container3 .circle4 {
-webkit-animation-delay: -0.1s;
animation-delay: -0.1s;
}

@-webkit-keyframes bouncedelay {
0%, 80%, 100% { -webkit-transform: scale(0.0) }
40% { -webkit-transform: scale(1.0) }
}

@keyframes bouncedelay {
0%, 80%, 100% {
transform: scale(0.0);
-webkit-transform: scale(0.0);
} 40% {
transform: scale(1.0);
-webkit-transform: scale(1.0);
}
}

.spinner3 {
40px;
height: 40px;
position: relative;
-webkit-animation: rotate 2.0s infinite linear;
animation: rotate 2.0s infinite linear;
}

.dot1, .dot2 {
60%;
height: 60%;
display: inline-block;
position: absolute;
top: 0;
background-color: #fff;
border-radius: 100%;

-webkit-animation: bounce 2.0s infinite ease-in-out;
animation: bounce 2.0s infinite ease-in-out;
}

.dot2 {
top: auto;
bottom: 0px;
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}

@-webkit-keyframes rotate { 100% { -webkit-transform: rotate(360deg) }}
@keyframes rotate { 100% { transform: rotate(360deg); -webkit-transform: rotate(360deg) }}

@-webkit-keyframes bounce {
0%, 100% { -webkit-transform: scale(0.0) }
50% { -webkit-transform: scale(1.0) }
}

@keyframes bounce {
0%, 100% {
transform: scale(0.0);
-webkit-transform: scale(0.0);
} 50% {
transform: scale(1.0);
-webkit-transform: scale(1.0);
}
}

.spinner4 {
30px;
height: 30px;
background-color: #fff;
-webkit-animation: rotateplane 1.2s infinite ease-in-out;
animation: rotateplane 1.2s infinite ease-in-out;
}

@-webkit-keyframes rotateplane {
0% { -webkit-transform: perspective(120px) }
50% { -webkit-transform: perspective(120px) rotateY(180deg) }
100% { -webkit-transform: perspective(120px) rotateY(180deg) rotateX(180deg) }
}

@keyframes rotateplane {
0% {
transform: perspective(120px) rotateX(0deg) rotateY(0deg);
-webkit-transform: perspective(120px) rotateX(0deg) rotateY(0deg)
} 50% {
transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg);
-webkit-transform: perspective(120px) rotateX(-180.1deg) rotateY(0deg)
} 100% {
transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
-webkit-transform: perspective(120px) rotateX(-180deg) rotateY(-179.9deg);
}
}

.spinner5 {
32px;
height: 32px;
position: relative;
}

.cube1, .cube2 {
background-color: #fff;
10px;
height: 10px;
position: absolute;
top: 0;
left: 0;

-webkit-animation: cubemove 1.8s infinite ease-in-out;
animation: cubemove 1.8s infinite ease-in-out;
}

.cube2 {
-webkit-animation-delay: -0.9s;
animation-delay: -0.9s;
}

@-webkit-keyframes cubemove {
25% { -webkit-transform: translateX(42px) rotate(-90deg) scale(0.5) }
50% { -webkit-transform: translateX(42px) translateY(42px) rotate(-180deg) }
75% { -webkit-transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5) }
100% { -webkit-transform: rotate(-360deg) }
}

@keyframes cubemove {
25% {
transform: translateX(42px) rotate(-90deg) scale(0.5);
-webkit-transform: translateX(42px) rotate(-90deg) scale(0.5);
} 50% {
transform: translateX(42px) translateY(42px) rotate(-179deg);
-webkit-transform: translateX(42px) translateY(42px) rotate(-179deg);
} 50.1% {
transform: translateX(42px) translateY(42px) rotate(-180deg);
-webkit-transform: translateX(42px) translateY(42px) rotate(-180deg);
} 75% {
transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5);
-webkit-transform: translateX(0px) translateY(42px) rotate(-270deg) scale(0.5);
} 100% {
transform: rotate(-360deg);
-webkit-transform: rotate(-360deg);
}
}

.spinner6 {
50px;
height: 30px;
text-align: center;
}

.spinner6 > div {
background-color: #fff;
height: 100%;
6px;
margin-left:2px;
display: inline-block;

-webkit-animation: stretchdelay 1.2s infinite ease-in-out;
animation: stretchdelay 1.2s infinite ease-in-out;
}

.spinner6 .rect2 {
-webkit-animation-delay: -1.1s;
animation-delay: -1.1s;
}

.spinner6 .rect3 {
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}

.spinner6 .rect4 {
-webkit-animation-delay: -0.9s;
animation-delay: -0.9s;
}

.spinner6 .rect5 {
-webkit-animation-delay: -0.8s;
animation-delay: -0.8s;
}

@-webkit-keyframes stretchdelay {
0%, 40%, 100% { -webkit-transform: scaleY(0.4) }
20% { -webkit-transform: scaleY(1.0) }
}

@keyframes stretchdelay {
0%, 40%, 100% {
transform: scaleY(0.4);
-webkit-transform: scaleY(0.4);
} 20% {
transform: scaleY(1.0);
-webkit-transform: scaleY(1.0);
}
}
.spinner7 {
90px;
height: 30px;
text-align: center;
}

.spinner7 > div {
background-color: #fff;
height: 15px;
15px;
margin-left:3px;
border-radius: 50%;
display: inline-block;

-webkit-animation: stretchdelay 0.7s infinite ease-in-out;
animation: stretchdelay 0.7s infinite ease-in-out;
}

.spinner7 .circ2 {
-webkit-animation-delay: -0.6s;
animation-delay: -0.6s;
}

.spinner7 .circ3 {
-webkit-animation-delay: -0.5s;
animation-delay: -0.5s;
}

.spinner7 .circ4 {
-webkit-animation-delay: -0.4s;
animation-delay: -0.4s;
}

.spinner7 .circ5 {
-webkit-animation-delay: -0.3s;
animation-delay: -0.3s;
}

@-webkit-keyframes stretchdelay {
0%, 40%, 100% { -webkit-transform: translateY(-10px) }
20% { -webkit-transform: translateY(-20px) }
}

@keyframes stretchdelay {
0%, 40%, 100% {
transform: translateY(-10px);
-webkit-transform: translateY(-10px);
} 20% {
transform: translateY(-20px);
-webkit-transform: translateY(-20px);
}
}

下面让我们来使用一下该插件，试试它的简单方便 : 

<!-- fakeLoader BEGIN -->

<link rel="stylesheet" type="text/css" href="fakeLoader.css">
<script type="text/javascript" src="fakeLoader.min.js"></script>
<div id="fakeLoader"></div>
<script type="text/javascript">
　　$('div#fakeLoader').fakeLoader({
　　　　timeToHide : 3000, //假加载的延时时长
　　　　bgColor : '#2fd0b5', //背景颜色
　　　　spinner : 'spinner3' //使用哪种预设动画,这里使用的是spinner3
　　});
</script>

<!-- fakeLoader END -->

当然别忘记在它之前引入jQuery文件哦，我一般使用 jQuery版本1.8.3 ;

分享给大家，希望大家能为移动WebApp添砖加瓦吧。