Record Button
A recorder button: click and the round dot morphs into a stop square, a halo pulses and a timer starts counting. The timer is a registered @property integer shown with counter(), zero padded.
Also known as: record button css, record stop button animation, voice recorder button.
HTML
<label class="btn-record">
<input class="btn-record-input" type="checkbox" aria-label="Record">
<span class="btn-record-face" aria-hidden="true">
<span class="btn-record-dot"></span>
<span class="btn-record-text"><span>Record</span><span class="btn-record-time"></span></span>
</span>
</label>CSS
@property --btn-record-s {
syntax: "<integer>";
inherits: false;
initial-value: 0;
}
.btn-record {
--c: var(--btn-color, #3b82f6);
position: relative;
display: inline-grid;
place-items: center;
font: 600 var(--btn-size, 18px)/1.1 system-ui, sans-serif;
cursor: pointer;
user-select: none;
-webkit-tap-highlight-color: transparent;
}
.btn-record-input {
position: absolute;
inset: 0;
z-index: 1;
width: 100%;
height: 100%;
margin: 0;
opacity: 0;
cursor: pointer;
}
.btn-record-face {
display: inline-flex;
align-items: center;
gap: 0.6em;
padding: 0.45em 1.3em 0.45em 0.45em;
border-radius: 2em;
background-color: color-mix(in srgb, var(--c) 10%, transparent);
color: var(--c);
box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--c) 28%, transparent);
transition: transform 0.25s cubic-bezier(0.3, 1.6, 0.5, 1), box-shadow 0.3s ease;
}
.btn-record-dot {
position: relative;
isolation: isolate;
display: grid;
place-items: center;
width: 2em;
height: 2em;
border-radius: 50%;
box-shadow: inset 0 0 0 0.14em color-mix(in srgb, var(--c) 45%, transparent);
}
.btn-record-dot::before,
.btn-record-dot::after {
content: "";
grid-area: 1 / 1;
width: 1.2em;
height: 1.2em;
border-radius: 50%;
background: var(--c);
transition: transform 0.4s cubic-bezier(0.3, 1.5, 0.5, 1), border-radius 0.4s cubic-bezier(0.3, 1.5, 0.5, 1);
}
.btn-record-dot::after {
z-index: -1;
opacity: 0;
transition: none;
}
.btn-record-text {
display: grid;
font-variant-numeric: tabular-nums;
}
.btn-record-text > span {
grid-area: 1 / 1;
transition: opacity 0.25s ease, transform 0.3s cubic-bezier(0.3, 0.7, 0.4, 1);
}
.btn-record-time {
opacity: 0;
transform: translateY(0.6em);
counter-reset: btn-record-s var(--btn-record-s);
}
.btn-record-time::before { content: "00:" counter(btn-record-s, decimal-leading-zero); }
.btn-record:active .btn-record-face { transform: scale(0.95); }
.btn-record-input:focus-visible ~ .btn-record-face {
outline: 2px solid var(--c);
outline-offset: 0.2em;
}
.btn-record-input:checked ~ .btn-record-face { box-shadow: inset 0 0 0 2px var(--c); }
.btn-record-input:checked ~ .btn-record-face .btn-record-dot::before {
border-radius: 0.2em;
transform: scale(0.62);
}
.btn-record-input:checked ~ .btn-record-face .btn-record-dot::after {
animation: btn-record-halo 1.4s cubic-bezier(0.2, 0.6, 0.4, 1) infinite;
}
.btn-record-input:checked ~ .btn-record-face .btn-record-text > span:first-child {
opacity: 0;
transform: translateY(-0.6em);
}
.btn-record-input:checked ~ .btn-record-face .btn-record-time {
opacity: 1;
transform: none;
animation: btn-record-count 60s steps(60) infinite;
}
@keyframes btn-record-halo {
0% { opacity: 0.55; transform: scale(1); }
100% { opacity: 0; transform: scale(2.4); }
}
@keyframes btn-record-count {
from { --btn-record-s: 0; }
to { --btn-record-s: 60; }
}
@media (prefers-reduced-motion: reduce) {
.btn-record, .btn-record *, .btn-record::before, .btn-record::after, .btn-record *::before, .btn-record *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--btn-coloron the element or a parent. Currently previewing#3b82f6. - Base size: set
--btn-size. Every other dimension is inem, so the whole thing scales together. Currently previewing18px. - 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.