界面懒加载优化问题

最近工作项目后期，要求到对界面进行优化。对于前端菜鸡来说真是各种炸，特将一些小demo应用整理出来，便人利己。

1.界面优化首先想到的是懒加载lazyloading，对此也进行了相关知识的百度，找到了较简单的插件fakeloader

2.也有相应的css

        3.界面优化主要的效果就是出现遮罩层显示加载状态，赋值一定的时间后，将界面全部展现出来

对界面初始化进行一些赋值：

 $(document).ready(function(){
    		$(".fakeloader").fakeLoader({
      		  timeToHide:1200,
    		    bgColor:"#eee",
       		 spinner:"spinner2",
      		  fadeDiv:"mytest"
   		 });
	});

4.那么遮罩层赋值好了，就需要在界面中放上遮罩层了

需要进行隐藏的代码需要放置在mytest的div内，用以起到timeout结束后进行显示

5.在初始化的代码中可以选择任一样式，通过spinner+i的形式选择

6.由于是前端渣渣，有问题可以互相交流哦！demo在下面附上，欢迎交流！

(a). index.html

(b).js

/*--------------------------------------------------------------------
 *JAVASCRIPT "FakeLoader.js"
 *Version:    1.1.0 - 2014
 *author:     João Pereira
 *website:    http://www.joaopereira.pt
 *Licensed MIT 
-----------------------------------------------------------------------*/
(function ($) {
 
    $.fn.fakeLoader = function(options) {

        //Defaults
        var settings = $.extend({
            timeToHide:1200, // Default Time to hide fakeLoader
            pos:'fixed',// Default Position
            top:'0px',  // Default Top value
            left:'0px', // Default Left value
            width:'100%', // Default width 
            height:'100%', // Default Height
            zIndex: '999',  // Default zIndex 
            bgColor: '#2ecc71', // Default background color
            spinner:'spinner7', // Default Spinner
            imagePath:'' // Default Path custom image
        }, options);

        //Customized Spinners
        var spinner01 = '
';
        var spinner02 = '
';
        var spinner03 = '
';
        var spinner04 = '
'; 
        var spinner05 = '
'; 
        var spinner06 = '
'; 
        var spinner07 = '
'; 

        //The target
        var el = $(this);

        //Init styles
        var initStyles = {
            'position':settings.pos,
            'width':settings.width,
            'height':settings.height,
            'top':settings.top,
            'left':settings.left
        };

        //Apply styles
        el.css(initStyles);

        //Each 
        el.each(function() {
            var a = settings.spinner;
            //console.log(a)
                switch (a) {
                    case 'spinner1':
                            el.html(spinner01);
                        break;
                    case 'spinner2':
                            el.html(spinner02);
                        break;
                    case 'spinner3':
                            el.html(spinner03);
                        break;
                    case 'spinner4':
                            el.html(spinner04);
                        break;
                    case 'spinner5':
                            el.html(spinner05);
                        break;
                    case 'spinner6':
                            el.html(spinner06);
                        break;
                    case 'spinner7':
                            el.html(spinner07);
                        break;
                    default:
                        el.html(spinner01);
                    }

                //Add customized loader image

                if (settings.imagePath !='') {
                    el.html('
');
                    centerLoader();
                }
        });

        //Time to hide fakeLoader
        setTimeout(function(){
        	if(settings.fadeDiv != ''){
                $("#"+settings.fadeDiv).css("display","block");
            }
    //隐藏加载页面
            $(el).fadeOut();
        }, settings.timeToHide);

        //Return Styles 
        return this.css({
            'backgroundColor':settings.bgColor,
            'zIndex':settings.zIndex
        });

 
    }; // End Fake Loader
 

        //Center Spinner
        function centerLoader() {

            var winW = $(window).width();
            var winH = $(window).height();

            var spinnerW = $('.fl').outerWidth();
            var spinnerH = $('.fl').outerHeight();

            $('.fl').css({
                'position':'absolute',
                'left':(winW/2)-(spinnerW/2),
                'top':(winH/2)-(spinnerH/2)
            });

        }

        $(window).load(function(){
                centerLoader();
              $(window).resize(function(){
                centerLoader();
              });
        });


}(jQuery));

(c).css

/**********************
 *CSS Animations by:
 *http://codepen.io/vivinantony
***********************/
.spinner1 {
  width: 40px;
  height: 40px;
  position: relative;
}


.double-bounce1, .double-bounce2 {
  width: 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 {
  width: 40px;
  height: 40px;
  position: relative;
}


.container1 > div, .container2 > div, .container3 > div {
  width: 12px;
  height: 12px;
  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;
  width: 100%;
  height: 100%;
}

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

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

.circle1 { top: 646px; left: 355px; }
.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 {
  width: 40px;
  height: 40px;
  position: relative;  
  -webkit-animation: rotate 2.0s infinite linear;
  animation: rotate 2.0s infinite linear;
}

.dot1, .dot2 {
  width: 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 {
  width: 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 {
  width: 32px;
  height: 32px;
  position: relative;
}

.cube1, .cube2 {
  background-color: #fff;
  width: 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 {
  width: 50px;
  height: 30px;
  text-align: center;
}

.spinner6 > div {
  background-color: #fff;
  height: 100%;
  width: 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 {
      width: 90px;
      height: 30px;
      text-align: center;
    }

    .spinner7 > div {
      background-color: #fff;
      height: 15px;
      width: 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);
      }
    }