AI Prompt Typing Animation
A prompt types itself into an AI input box, then the send button lights up in the accent color with a small pop. Letters are spans with staggered delays, so any font works.
Also known as: ai chat input animation, prompt box typing effect, animated ai search bar.
HTML
<div class="txt-ai-prompt-typing" aria-label="Plan a 3-day trip to Kyoto">
<svg class="txt-ai-prompt-typing-spark" viewBox="0 0 24 24" aria-hidden="true"><path d="M12 2.5l2.1 7.4 7.4 2.1-7.4 2.1-2.1 7.4-2.1-7.4-7.4-2.1 7.4-2.1z"/></svg>
<span class="txt-ai-prompt-typing-field" aria-hidden="true">
<span class="txt-ai-prompt-typing-ph">Ask anything...</span>
<span class="txt-ai-prompt-typing-t"><span style="--i: 0">P</span><span style="--i: 1">l</span><span style="--i: 2">a</span><span style="--i: 3">n</span><span style="--i: 4"> </span><span style="--i: 5">a</span><span style="--i: 6"> </span><span style="--i: 7">3</span><span style="--i: 8">-</span><span style="--i: 9">d</span><span style="--i: 10">a</span><span style="--i: 11">y</span><span style="--i: 12"> </span><span style="--i: 13">t</span><span style="--i: 14">r</span><span style="--i: 15">i</span><span style="--i: 16">p</span><span style="--i: 17"> </span><span style="--i: 18">t</span><span style="--i: 19">o</span><span style="--i: 20"> </span><span style="--i: 21">K</span><span style="--i: 22">y</span><span style="--i: 23">o</span><span style="--i: 24">t</span><span style="--i: 25">o</span></span>
</span>
<span class="txt-ai-prompt-typing-send" aria-hidden="true"><svg viewBox="0 0 24 24"><path d="M12 19V5M5.5 11.5 12 5l6.5 6.5"/></svg></span>
</div>CSS
.txt-ai-prompt-typing {
--c: var(--txt-color, #3b82f6);
font-size: var(--txt-size, 32px);
font-family: system-ui, sans-serif;
font-weight: 700;
line-height: 1.2;
display: inline-flex;
align-items: center;
gap: 0.55em;
box-sizing: border-box;
width: 17em;
padding: 0.4em 0.4em 0.4em 0.8em;
border-radius: 99em;
font-size: calc(var(--txt-size, 32px) * 0.62);
font-weight: 500;
background: color-mix(in srgb, currentColor 5%, transparent);
box-shadow: inset 0 0 0 1px color-mix(in srgb, currentColor 16%, transparent);}
.txt-ai-prompt-typing-spark {
display: block;
flex: none;
width: 1.1em;
height: 1.1em;
fill: var(--c);
animation: txt-ai-prompt-typing-twinkle 0.6s cubic-bezier(0.3, 1.5, 0.5, 1) 2s;
}
.txt-ai-prompt-typing-field {
display: grid;
flex: 1;
white-space: nowrap;
text-align: left;
}
.txt-ai-prompt-typing-ph,
.txt-ai-prompt-typing-t {
grid-area: 1 / 1;
}
.txt-ai-prompt-typing-ph {
color: color-mix(in srgb, currentColor 45%, transparent);
animation: txt-ai-prompt-typing-gone 0s 0.5s forwards;
}
.txt-ai-prompt-typing-t span {
position: relative;
opacity: 0;
animation: txt-ai-prompt-typing-key 0s calc(0.5s + var(--i) * 50ms) forwards;
}
/* each letter holds the caret for one beat; the last one keeps it */
.txt-ai-prompt-typing-t span::after {
content: "";
position: absolute;
top: 0.1em;
bottom: 0.05em;
right: -0.06em;
width: 0.08em;
background: var(--c);
opacity: 0;
animation: txt-ai-prompt-typing-caret 50ms step-end calc(0.5s + var(--i) * 50ms);
}
.txt-ai-prompt-typing-t span:last-child::after {
animation: txt-ai-prompt-typing-blink 1s step-end calc(0.5s + var(--i) * 50ms) infinite;
}
.txt-ai-prompt-typing-send {
display: grid;
flex: none;
place-items: center;
width: 1.9em;
height: 1.9em;
border-radius: 50%;
color: color-mix(in srgb, currentColor 45%, transparent);
background: color-mix(in srgb, currentColor 10%, transparent);
animation: txt-ai-prompt-typing-ready 0.45s cubic-bezier(0.3, 1.6, 0.5, 1) 1.95s forwards;
}
.txt-ai-prompt-typing-send svg {
display: block;
width: 1em;
height: 1em;
fill: none;
stroke: currentColor;
stroke-width: 2.6;
stroke-linecap: round;
stroke-linejoin: round;
}
@keyframes txt-ai-prompt-typing-gone {
to { visibility: hidden; }
}
@keyframes txt-ai-prompt-typing-key {
to { opacity: 1; }
}
@keyframes txt-ai-prompt-typing-caret {
0%, 100% { opacity: 1; }
}
@keyframes txt-ai-prompt-typing-blink {
0% { opacity: 1; }
50% { opacity: 0; }
}
@keyframes txt-ai-prompt-typing-ready {
0% { transform: scale(1); }
50% { transform: scale(1.18); }
100% { transform: scale(1); color: #fff; background: var(--c); }
}
@keyframes txt-ai-prompt-typing-twinkle {
50% { transform: rotate(45deg) scale(1.25); }
}
@media (prefers-reduced-motion: reduce) {
.txt-ai-prompt-typing, .txt-ai-prompt-typing *, .txt-ai-prompt-typing::before, .txt-ai-prompt-typing::after, .txt-ai-prompt-typing *::before, .txt-ai-prompt-typing *::after {
animation-duration: 0.01ms !important;
animation-iteration-count: 1 !important;
transition-duration: 0.01ms !important;
}
}Customizing this snippet
- Color: set
--txt-coloron the element or a parent. Currently previewing#3b82f6. - Font size: set
--txt-size. Every other dimension is inem, so the whole thing scales together. Currently previewing40px. - 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.