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Jakubantalik / transitions.dev

transitions-dev

Production-ready CSS transitions for web apps. Use when implementing notification badges, dropdowns, modals, panel reveals, page transitions, card resizes, number pop-ins, text swaps, icon swaps, success checks, avatar group hovers, error state shakes, search/input clear, skeleton loaders, shimmer text, sliding tabs, tooltips, staggered text reveals, card hover tilt, plus-to-menu morph, accordions, toasts, like buttons, learn-more hovers, checkbox checks, spinning counters, toggles, AI thinking states, reasoning streams, streaming text, matrix dot loaders, or banner stacking. Triggers on "add a transition", "animate the dropdown", "make the modal open smoothly", "swap icon", "page slide", "stagger animation", "open / close transition", "make it animate", "fade between", "success animation", "form error", "shake on invalid", "hover lift", "avatar stack hover", "clear the search", "skeleton loader", "loading shimmer", "shimmer text", "sliding tabs", "segmented control", "tooltip", "reveal text", "tilt card", "3D hover tilt", "cursor glare", "plus to menu", "FAB morph", "accordion", "collapsible", "expand / collapse", "disclosure", "toast", "snackbar", "like button", "heart animation", "learn more arrow", "checkbox", "check animation", "spinning counter", "odometer", "slot machine digits", "toggle", "switch", "thinking states", "AI status line", "agent reasoning", "reasoning stream", "streaming text", "stream words in", "matrix loader", "dot loader", "banner stack", "stacked toasts". Also "motion tokens", "scan for ad-hoc transitions", "replace hardcoded durations with motion tokens", "tokenize my animations", and the commands transitions reveal, transitions review, transitions apply, transitions refine.

View sourceMotionInteraction

Install

npx skills add https://github.com/Jakubantalik/transitions.dev --skill transitions-dev

Texts reveal

When to use

A headline + supporting line that rise into view with staggered blur — hero copy, empty states, onboarding steps. Exit is decoupled: a single quiet fade with no Y-return so dismissing doesn't replay the reveal in reverse.

HTML usage

html
<div class="t-stagger">  <strong class="t-stagger-line t-stagger-line--1">…</strong>  <span class="t-stagger-line t-stagger-line--2">…</span></div>

State:

  • Add .is-shown to play the staggered entrance.
  • Add .is-hiding (and remove .is-shown) to fade out in place over a short 200ms — independent of the entrance timing so the exit doesn't replay the stagger.

Add more lines by adding .t-stagger-line--N with transition-delay: calc(var(--stagger-stagger) * (N - 1)).

Tunable variables

VariableDefaultNotes
--stagger-dur500mssourced from --p18-dur
--stagger-distance12pxsourced from --p18-distance
--stagger-stagger40mssourced from --p18-stagger
--stagger-blur3pxsourced from --p18-blur
--stagger-easecubic-bezier(0.22, 1, 0.36, 1)sourced from --p18-ease

The :root defaults below match the live tuning on transitions.dev. Drop them into your global stylesheet once — every transition in this skill reads from semantic names like these, so multiple transitions can share a single :root block.

css
:root {  --stagger-dur: 500ms;  --stagger-distance: 12px;  --stagger-stagger: 40ms;  --stagger-blur: 3px;  --stagger-ease: cubic-bezier(0.22, 1, 0.36, 1);}

CSS

css
/* Lines start translated down + blurred + invisible; .is-shown   on the parent flips them to their resting state. The second   line's transition-delay holds it back by --stagger-stagger   so the eye lands on the headline first. */.t-stagger-line {  display: block;  opacity: 0;  transform: translateY(var(--stagger-distance));  filter: blur(var(--stagger-blur));  transition:    opacity   var(--stagger-dur) var(--stagger-ease),    transform var(--stagger-dur) var(--stagger-ease),    filter    var(--stagger-dur) var(--stagger-ease);  will-change: transform, opacity, filter;}.t-stagger-line--2 { transition-delay: var(--stagger-stagger); }
.t-stagger.is-shown .t-stagger-line {  opacity: 1;  transform: translateY(0);  filter: blur(0);}/* Exit decouples from the stagger: same fade for every line,   no Y return, no blur — so the disappearance reads as a   single quiet fade instead of a reverse reveal. */.t-stagger.is-hiding .t-stagger-line {  opacity: 0;  transform: translateY(0);  filter: blur(0);  transition:    opacity 200ms ease,    transform 0s linear,    filter 0s linear;  transition-delay: 0s;}
@media (prefers-reduced-motion: reduce) {  .t-stagger-line { transition: none !important; }}

The @media (prefers-reduced-motion: reduce) guard at the bottom of the snippet is required — keep it. It zeroes the transition for users who have asked for less motion at the OS level.

JavaScript orchestration

js
const block = document.querySelector(".t-stagger");
function showText() {  block.classList.remove("is-hiding");  block.classList.remove("is-shown");  void block.offsetHeight;  block.classList.add("is-shown");}function hideText() {  block.classList.add("is-hiding");  block.classList.remove("is-shown");  setTimeout(() => block.classList.remove("is-hiding"), 200);}