animation border+background渐进实现点点点loading效果实例页面

CSS代码：

.dotting {
    display: inline-block; width: 10px; min-height: 2px;
    padding-right: 2px;
    border-left: 2px solid currentColor; border-right: 2px solid currentColor;
    background-color: currentColor; background-clip: content-box;
    box-sizing: border-box;
    -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-left: 2px; padding-left: 2px; } /* IE9+ */

@-webkit-keyframes dot {
    25% { border-color: transparent; background-color: transparent; }
    50% { border-right-color: transparent; background-color: transparent; }
    75% { border-right-color: transparent; }
}
@keyframes dot {
    25% { border-color: transparent; background-color: transparent; }
    50% { border-right-color: transparent; background-color: transparent; }
    75% { border-right-color: transparent; }
}
                

HTML代码：

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