Password Typing Animation
Each character shows for a moment and then turns into a dot, the way phone keyboards mask passwords, while a strength meter fills and its label climbs from Weak to Strong.
Also known as: password field animation css, masked input typing, password strength meter animation.
HTML
<div class="txt-password-typing" aria-label="Password, strength: strong">
<span class="txt-password-typing-field" aria-hidden="true"><span style="--i: 0"><b>s</b></span><span style="--i: 1"><b>u</b></span><span style="--i: 2"><b>n</b></span><span style="--i: 3"><b>f</b></span><span style="--i: 4"><b>l</b></span><span style="--i: 5"><b>o</b></span><span style="--i: 6"><b>w</b></span><span style="--i: 7"><b>e</b></span><span style="--i: 8"><b>r</b></span><span style="--i: 9"><b>7</b></span></span>
<span class="txt-password-typing-meter" aria-hidden="true">
<span class="txt-password-typing-bars"><i style="--t: 0.48s"></i><i style="--t: 1.02s"></i><i style="--t: 1.56s"></i><i style="--t: 1.92s"></i></span>
<span class="txt-password-typing-label"><em style="--a: 0.48s; --b: 1.02s">Weak</em><em style="--a: 1.02s; --b: 1.56s">Fair</em><em style="--a: 1.56s; --b: 1.92s">Good</em><em style="--a: 1.92s">Strong</em></span>
</span>
</div>CSS
.txt-password-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-grid;
gap: 0.5em;
width: 9.5em;
font-size: calc(var(--txt-size, 32px) * 0.7);
font-weight: 600;
text-align: left;}
.txt-password-typing-field {
display: flex;
align-items: center;
height: 2em;
padding: 0 0.8em;
border-radius: 0.45em;
font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
background: color-mix(in srgb, currentColor 5%, transparent);
box-shadow: inset 0 0 0 1px color-mix(in srgb, currentColor 18%, transparent);
}
.txt-password-typing-field span {
position: relative;
display: inline-block;
width: 1.1ch;
text-align: center;
}
/* the typed letter shows briefly... */
.txt-password-typing-field b {
font-weight: inherit;
animation: txt-password-typing-char 0.55s ease-out calc(0.3s + var(--i) * 0.18s) both;
}
/* ...then a dot takes its place */
.txt-password-typing-field span::after {
content: "";
position: absolute;
top: 50%;
left: 50%;
width: 0.42em;
height: 0.42em;
margin: -0.21em 0 0 -0.21em;
border-radius: 50%;
background: currentColor;
animation: txt-password-typing-dot 0.2s ease-out calc(0.7s + var(--i) * 0.18s) both;
}
.txt-password-typing-meter {
display: flex;
align-items: center;
gap: 0.6em;
font-size: 0.75em;
}
.txt-password-typing-bars {
display: flex;
flex: 1;
gap: 0.25em;
}
.txt-password-typing-bars i {
flex: 1;
height: 0.3em;
border-radius: 0.15em;
background: color-mix(in srgb, currentColor 14%, transparent);
animation: txt-password-typing-bar 0.25s ease-out var(--t) forwards;
}
.txt-password-typing-label {
display: grid;
width: 3.4em;
color: var(--c);
}
.txt-password-typing-label em {
grid-area: 1 / 1;
font-style: normal;
visibility: hidden;
animation: txt-password-typing-label calc(var(--b) - var(--a)) step-end var(--a);
}
.txt-password-typing-label em:last-child {
animation: txt-password-typing-stay 0s var(--a) forwards;
}
@keyframes txt-password-typing-char {
0% { opacity: 0; transform: translateY(0.3em); }
25%, 70% { opacity: 1; transform: none; }
100% { opacity: 0; transform: scale(0.4); }
}
@keyframes txt-password-typing-dot {
from { opacity: 0; transform: scale(0.2); }
}
@keyframes txt-password-typing-bar {
to { background: var(--c); }
}
@keyframes txt-password-typing-label {
0%, 100% { visibility: visible; }
}
@keyframes txt-password-typing-stay {
to { visibility: visible; }
}
@media (prefers-reduced-motion: reduce) {
.txt-password-typing, .txt-password-typing *, .txt-password-typing::before, .txt-password-typing::after, .txt-password-typing *::before, .txt-password-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.