css3绘制一个圆圆的loading转圈动画实例分享(2)-木庄网络博客

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$width: 64px;
$height: 64px;
$dotWidth: 10px;
$dotHeight: 10px;
$radius: 5px;
$offset: 9.37px;
 
@function getLeft( $x ) {
  @return ($width/4)*$x;
}
 
@function getTop( $y ) {
  @return ($height/4)*$y;
}
 
@keyframes changeOpacity {
    from { opacity: 1; }
    to { opacity: .2; }
}
 
.q-loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    .q-loading-overlay { 
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(255, 255, 255, .5);  
    }
    .q-loading-content {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        width: $width;
        height: $height;
        z-index: 2;
    }
    .dot {
        width: 10px;
        height: 10px;
        position: absolute;
        background-color: #0033cc;
        border-radius: 50% 50%;
        opacity: 1;
        animation: changeOpacity 1.04s ease infinite;
    }
    .dot1 {
        left: 0;
        top: 50%;
        margin-top: -$radius;
        animation-delay: 0.13s;
    }
    .dot2 {
        left: $offset;
        top: $offset;
        animation-delay: 0.26s;
    }
    .dot3 {
        left: 50%;
        top: 0;
        margin-left: -$radius;
        animation-delay: 0.39s;
    }
    .dot4 {
        top: $offset;
        right: $offset;
        animation-delay: 0.52s;
    }
    .dot5 {
        right: 0;
        top: 50%;
        margin-top: -$radius;
        animation-delay: 0.65s;
    }
    .dot6 {
        right: $offset;
        bottom: $offset;
        animation-delay: 0.78s;
    }
    .dot7 {
        bottom: 0;
        left: 50%;
        margin-left: -$radius;
        animation-delay: 0.91s;
    }
    .dot8 {
        bottom: $offset;
        left: $offset;
        animation-delay: 1.04s;
    }
}