css 实现一行文字伸缩展开、模糊到清晰的交融动画

伸缩展开:通过letter-spacing调整字间距即可实现文字的伸缩展开
模糊到清晰交融:通过filter:contrast和filter:blur实现

效果图:




代码示例:

html, body {
    
    
    height: 100%;
    width: 100%;
    background-color: black;
}

.container {
    
    
    width: 100%;
    height: 100%;
    position: relative;
    padding: 2em;
    filter: contrast(20);
    background-color: black;
    overflow: hidden;
}

h1 {
    
    
    font-family: Righteous;
    color: white;
    font-size: 4rem;
    text-transform: uppercase;
    line-height: 1;
    animation: letterspacing 5s infinite alternate ease-in-out;
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%, -50%, 0);
    letter-spacing: -2.2rem;
}

@keyframes letterspacing {
    
    
    0% {
    
    
        letter-spacing: -2.2rem;
        filter: blur(.5rem);
    }

    50% {
    
    
        filter: blur(.5rem);
    }

    100% {
    
    
        letter-spacing: .5rem;
        filter: blur(0rem);
        color: #fff;
    }
}


<div class="container">
  <h1>Blur word Animation</h1>
</div>