Double Underline Animation
The bookkeeper's double rule under a grand total: one line draws left to right, the second comes back right to left beneath it. Two pseudo-elements, one keyframe, opposite transform origins.
Also known as: double underline css, accounting total underline, two line underline text.
Total $1,240.00
HTML
<div class="txt-double-underline-text">Total <span class="txt-double-underline-text-sum">$1,240.00</span></div>
CSS
.txt-double-underline-text {
--c: var(--txt-color, #3b82f6);
font-size: var(--txt-size, 32px);
font-family: system-ui, sans-serif;
font-weight: 700;
line-height: 1.2;
white-space: nowrap;
font-variant-numeric: tabular-nums;}
.txt-double-underline-text-sum {
position: relative;
display: inline-block;
margin-left: 0.2em;
color: var(--c);
}
.txt-double-underline-text-sum::before,
.txt-double-underline-text-sum::after {
content: "";
position: absolute;
left: -0.04em;
right: -0.04em;
height: 0.06em;
border-radius: 0.03em;
background: var(--c);
transform: scaleX(0);
transform-origin: 0 50%;
animation: txt-double-underline-text-draw 0.5s cubic-bezier(0.65, 0, 0.35, 1) 0.3s forwards;
}
.txt-double-underline-text-sum::before { bottom: 0; }
.txt-double-underline-text-sum::after {
bottom: -0.14em;
transform-origin: 100% 50%;
animation-delay: 0.7s;
}
@keyframes txt-double-underline-text-draw {
to { transform: scaleX(1); }
}
@media (prefers-reduced-motion: reduce) {
.txt-double-underline-text, .txt-double-underline-text *, .txt-double-underline-text::before, .txt-double-underline-text::after, .txt-double-underline-text *::before, .txt-double-underline-text *::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.