CSS3 animation box-shadow渐进实现点点点loading效果实例页面

CSS代码：

.dotting {
    display: inline-block; min-width: 2px; min-height: 2px;
    box-shadow: 2px 0 currentColor, 6px 0 currentColor, 10px 0 currentColor; 
    -webkit-animation: dot 4s infinite step-start both;
    animation: dot 4s infinite step-start both;
    *zoom: expression(this.innerHTML = '...'); /* IE7 */
}
.dotting:before { content: '...'; } /* IE8 */
.dotting::before { content: ''; }
:root .dotting { margin-right: 8px; } /* IE9+,FF,CH,OP,SF */

@-webkit-keyframes dot {
    25% { box-shadow: none; }
    50% { box-shadow: 2px 0 currentColor; }
    75% { box-shadow: 2px 0 currentColor, 6px 0 currentColor; }
}
@keyframes dot {
    25% { box-shadow: none; }
    50% { box-shadow: 2px 0 currentColor; }
    75% { box-shadow: 2px 0 currentColor, 6px 0 currentColor; }
}
                

HTML代码：

<a href="javascript:" class="grebtn">订单提交中<span class="dotting"></span></a>