纯CSS炫酷的按钮

CSS代码

.fill:hover,
.fill:focus {
    -webkit-box-shadow: inset 0 0 0 2em var(--hover);
    box-shadow: inset 0 0 0 2em var(--hover);
}

.pulse:hover,
.pulse:focus {
    -webkit-animation: pulse 1s;
    animation: pulse 1s;
    -webkit-box-shadow: 0 0 0 2em rgba(255, 255, 255, 0);
    box-shadow: 0 0 0 2em rgba(255, 255, 255, 0);
}

@-webkit-keyframes pulse {
    0% {
        -webkit-box-shadow: 0 0 0 0 var(--hover);
        box-shadow: 0 0 0 0 var(--hover);
    }
}

@keyframes pulse {
    0% {
        -webkit-box-shadow: 0 0 0 0 var(--hover);
        box-shadow: 0 0 0 0 var(--hover);
    }
}

.close:hover,
.close:focus {
    -webkit-box-shadow: inset -3.5em 0 0 0 var(--hover), inset 3.5em 0 0 0 var(--hover);
    box-shadow: inset -3.5em 0 0 0 var(--hover), inset 3.5em 0 0 0 var(--hover);
}

.raise:hover,
.raise:focus {
    -webkit-box-shadow: 0 0.5em 0.5em -0.4em var(--hover);
    box-shadow: 0 0.5em 0.5em -0.4em var(--hover);
    -webkit-transform: translateY(-0.25em);
    transform: translateY(-0.25em);
}

.up:hover,
.up:focus {
    -webkit-box-shadow: inset 0 -3.25em 0 0 var(--hover);
    box-shadow: inset 0 -3.25em 0 0 var(--hover);
}

.slide:hover,
.slide:focus {
    -webkit-box-shadow: inset 6.5em 0 0 0 var(--hover);
    box-shadow: inset 6.5em 0 0 0 var(--hover);
}

.offset {
    -webkit-box-shadow: 0.3em 0.3em 0 0 var(--color), inset 0.3em 0.3em 0 0 var(--color);
    box-shadow: 0.3em 0.3em 0 0 var(--color), inset 0.3em 0.3em 0 0 var(--color);
}

.offset:hover,
.offset:focus {
    -webkit-box-shadow: 0 0 0 0 var(--hover), inset 6em 3.5em 0 0 var(--hover);
    box-shadow: 0 0 0 0 var(--hover), inset 6em 3.5em 0 0 var(--hover);
}

.fill {
    --color: #a972cb;
    --hover: #cb72aa;
}

.pulse {
    --color: #ef6eae;
    --hover: #ef8f6e;
}

.close {
    --color: #ff7f82;
    --hover: #ffdc7f;
}

.raise {
    --color: #ffa260;
    --hover: #e5ff60;
}

.up {
    --color: #e4cb58;
    --hover: #94e458;
}

.slide {
    --color: #8fc866;
    --hover: #66c887;
}

.offset {
    --color: #19bc8b;
    --hover: #1973bc;
}

button {
    color: var(--color);
    -webkit-transition: 0.25s;
    transition: 0.25s;
}

button:hover,
button:focus {
    border-color: var(--hover);
    color: #fff;
}

button {
    background: none;
    border: 2px solid;
    font: inherit;
    line-height: 1;
    margin: 0.5em;
    padding: 1em 2em;
}

Html代码

<div class="buttons">
  <button class="fill">Fill In</button>
  <button class="pulse">Pulse</button>
  <button class="close">Close</button>
  <button class="raise">Raise</button>
  <button class="up">Fill Up</button>
  <button class="slide">Slide</button>
  <button class="offset">Offset</button>
</div>

搬运自:

https://developer.mozilla.org/en/docs/Web/CSS/box-shadow

box-shadow: [inset?] [top] [left] [blur] [size] [color];

Tips:

• We're setting all the blurs to 0 since we want a solid fill.
  - Add the inset keyword so the box-shadow is on the inside of the element
  • Animating the inset shadow on hover looks like the element is filling in from whatever side you specify ([top] and [left] accept negative values to become [bottom] and [right])
  • Multiple shadows can be stacked
  • If you're animating multiple shadows, be sure to keep the same number of shadows so the animation is smooth. Otherwise, you'll get something choppy.