Text Swap Button
The label slides up and out while a second label, stored in a data attribute, slides in from below. Handy for 'Subscribe' becoming 'Let's go' without any JavaScript.
Also known as: label change on hover, sliding text button.
HTML
<button class="hfx-swap-text" data-hover="Let's go!"><span>Subscribe</span></button>
CSS
.hfx-swap-text {
--c: var(--hfx-color, #3b82f6);
font-size: var(--hfx-size, 16px);
display: inline-flex;
align-items: center;
gap: 0.5em;
padding: 0.7em 1.6em;
border-radius: 0.5em;
font: 600 1em system-ui, sans-serif;
cursor: pointer;
position: relative;
overflow: hidden;
border: 0;
background: var(--c);
color: #fff;}
.hfx-swap-text span {
display: block;
transition: transform 0.35s ease;
}
.hfx-swap-text::after {
content: attr(data-hover);
position: absolute;
inset: 0;
display: grid;
place-items: center;
transform: translateY(100%);
transition: transform 0.35s ease;
}
.hfx-swap-text:hover span { transform: translateY(-300%); }
.hfx-swap-text:hover::after { transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
.hfx-swap-text, .hfx-swap-text *, .hfx-swap-text::before, .hfx-swap-text::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--hfx-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--hfx-size. Every other dimension is inem, so the whole thing scales together. Currently previewing16px. - Speed: change the duration on the
transitionoranimationshorthand. Staggered delays are relative, so they keep their rhythm. - Reduced motion: the rule at the end of the CSS turns the motion off for people who asked their OS for less of it. Keep it.