45.纯 CSS 创作一个菱形 loader 动画

原文地址：https://segmentfault.com/a/1190000015208027#articleHeader3

感想： 网格布局-》 display: grid;

HTML code:

<div class="loader">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
</div>

CSS code:

html, body {
    margin: 0;
    padding: 0;
}
body{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: black;
}
.loader{
    width: 10em;
    height: 10em;
    /* 网格布局 */
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 0.5em;
    /* 旋转 ： 45度 */
    transform: rotate(45deg);
}

/* 以竖向的小菱形为单位，为小菱形涂颜色 */
.loader span{
    background-color: var(--c);
    animation: blinking 2s linear var(--d) infinite;
    /* animation-delay: var(--d); */
    transform: scale(0);
}
/* blinking : 闪烁 */
@keyframes blinking{
    0%,100%{
        transform: scale(0);
    }
    40%,80%{
        transform: scale(1);
    }
}
.loader span:nth-child(7) {
    --c: tomato;
    --d: 0s;
}

.loader span:nth-child(4),
.loader span:nth-child(8) {
    --c: gold;
    --d: 0.2s;
}
.loader span:nth-child(1),
.loader span:nth-child(5),
.loader span:nth-child(9) {
    --c: limegreen;
    --d: 0.4s;
}
.loader span:nth-child(2),
.loader span:nth-child(6) {
    --c: dodgerblue;
    --d: 0.6s;
}
.loader span:nth-child(3) {
    --c: mediumpurple;
    --d: 0.8s;
}