[animation] 도형로딩 애니메이션 #2

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

부모가 이미 absolute면 relative로 바꾸지 않아도 된다.

calc() 함수 사용해서 정확하게 계산하기

 

.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);    
    width: 100px;
    height: 100px;
    /* border: 1px solid #000; */
}
.loading span {
    position: absolute;
    width: 30px;
    height: 30px;
    top: 0;
    left: 0;
    animation: clockwise 2s linear infinite;
}
.loading span:nth-child(1) {
    background-color: pink;

}
.loading span:nth-child(2) {
    background-color: palegoldenrod;
    animation-delay: 1s;
}

/* Animation */
@keyframes clockwise {
    0% {
        top: 0;
        left: 0;
    }
    25% {
        top: 0;
        left: calc(100% - 30px);
        background-color: dodgerblue;
    }
    50% {  
        top: calc(100% - 30px);
        left: calc(100% - 30px);
        background-color: orange;
    }
    75% {
        top: calc(100% - 30px);
        left: 0;
        background-color: yellowgreen;
    }
    100% {
        top: 0;
        left: 0;
    }
}