css3实现类似地图定位循环扩散光圈效果(最新推荐)(css 地图)

1.效果图,重点opacity,animation,transform:scale

2.html

<p class="9027-c2c7-1aab-5682 icon-warnCom">
        <icon class="c2c7-1aab-5682-c067 icon-warns"><i class="1aab-5682-c067-3df1 dot"></i><i class="5682-c067-3df1-224d pulse"></i></icon>
    </p>
    <p class="c067-3df1-224d-6dfd icon-warnCom1">
        <icon class="3df1-224d-6dfd-2ed0 icon-warns"><i class="224d-6dfd-2ed0-0907 dot"></i><i class="6dfd-2ed0-0907-c06d pulse"></i></icon>
    </p>
    <p class="2ed0-0907-c06d-9471 icon-warnCom2">
        <icon class="0907-c06d-9471-8ce0 icon-warns"><i class="c06d-9471-8ce0-685b dot"></i><i class="debe-1c4c-e573-ef7f pulse"></i></icon>
    </p>

3.css

 body {
            width: 100%;
            height: 100%;
            background-color: black;
        }
        @keyframes warn {
            0% {
                transform: scale(0);
                opacity: 0.0;
            }
            25% {
                transform: scale(0);
                opacity: 0.1;
            }
            50% {
                transform: scale(0.1);
                opacity: 0.3;
            }
            75% {
                transform: scale(0.2);
                opacity: 0.5;
            }
            100% {
                transform: scale(0.3);
                opacity: 0.0;
            }
        }
        .icon-warnCom {
            position: absolute;
            width: 12px;
            height: 12px;
            background-color: #ffd803;
            border-radius: 100%;
            top: 100px;
            left: 100px;
        }
        .icon-warns {
            position: relative;
            width: 100%;
            height: 100%;
            display: block;
        }
        /* 保持大小不变的小圆圈  */
        .dot {
            position: absolute;
            left: -44px;
            top: -44px;
            width: 60px;
            height: 60px;
            -webkit-border-radius: 100;
            -moz-border-radius: 100;
            border: 20px solid #f6c100;
            border-radius: 100%;
            z-index: 2;
            opacity: 0;
            -webkit-animation: warn 2.5s ease-out;
            -moz-animation: warn 2.5s ease-out;
            animation: warn 2.5s ease-out;
            -webkit-animation-iteration-count: infinite;
            -moz-animation-iteration-count: infinite;
            animation-iteration-count: infinite;
        }
        /* 产生动画（向外扩散变大）的圆圈  */
        .pulse {
            position: absolute;
            left: -44px;
            top: -44px;
            width: 60px;
            height: 60px;
            border: 20px solid #f6c100;
            -webkit-border-radius: 100%;
            -moz-border-radius: 100%;
            border-radius: 100%;
            z-index: 1;
            opacity: 1;
            -webkit-animation: warn 1.5s ease-out;
            -moz-animation: warn 1.5s ease-out;
            animation: warn 1.5s ease-out;
            -webkit-animation-iteration-count: infinite;
            -moz-animation-iteration-count: infinite;
            animation-iteration-count: infinite;
        }
        .icon-warnCom1 {
            position: absolute;
            width: 12px;
            height: 12px;
            background-color: #ffd803;
            border-radius: 100%;
            top: 50px;
            left: 50px;
        }
        .icon-warnCom2 {
            position: absolute;
            width: 12px;
            height: 12px;
            background-color: #ffd803;
            border-radius: 100%;
            top: 100px;
            left: 50px;
        }

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