Striped Fill Button
Thin diagonal stripes appear and thicken until they merge into a solid fill. The stripe width is a registered @property length, which is what lets a repeating gradient transition.
Also known as: diagonal stripes hover, stripes fill button, hatch fill button.
HTML
<button class="hfx-stripe-fill">Join the beta</button>
CSS
@property --hfx-stripe-fill-w {
syntax: "<length>";
inherits: false;
initial-value: 0px;
}
.hfx-stripe-fill {
--c: var(--hfx-color, #3b82f6);
position: relative;
isolation: isolate;
overflow: hidden;
display: inline-flex;
align-items: center;
justify-content: center;
gap: 0.5em;
padding: 0.75em 1.75em;
border-radius: 0.5em;
font: 600 var(--hfx-size, 16px)/1.2 system-ui, sans-serif;
white-space: nowrap;
cursor: pointer;
border: 2px solid var(--c);
background: transparent;
color: var(--c);
transition: color 0.25s ease 0.2s;
}
.hfx-stripe-fill::before {
content: "";
position: absolute;
inset: 0;
z-index: -1;
background: repeating-linear-gradient(-45deg, var(--c) 0 var(--hfx-stripe-fill-w), transparent 0 0.9em);
transition: --hfx-stripe-fill-w 0.5s cubic-bezier(0.65, 0, 0.35, 1);
}
.hfx-stripe-fill:is(:hover, :focus-visible) {
background-color: var(--c); /* hides the hairline where the fill meets the border */
color: #fff;
transition: color 0.25s ease 0.2s, background-color 0s 0.5s;
}
.hfx-stripe-fill:is(:hover, :focus-visible)::before { --hfx-stripe-fill-w: 0.9em; }
@media (prefers-reduced-motion: reduce) {
.hfx-stripe-fill, .hfx-stripe-fill *, .hfx-stripe-fill::before, .hfx-stripe-fill::after, .hfx-stripe-fill *::before, .hfx-stripe-fill *::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.