5f:I[707087,["/_next/static/immutable/chunks/3arlv5bvukoo2.js","/_next/static/immutable/chunks/39v64hmfyo-sr.js","/_next/static/immutable/chunks/2nvof3-29tvc3.js","/_next/static/immutable/chunks/3tjobt77z_9dj.js","/_next/static/immutable/chunks/04j_o97cgxn2x.js","/_next/static/immutable/chunks/3upr08c9vtj8w.js","/_next/static/immutable/chunks/1ww0328si-u8x.js","/_next/static/immutable/chunks/11mfl5ymqld9-.js","/_next/static/immutable/chunks/2xxcqy6ppds3l.js","/_next/static/immutable/chunks/1bpgyrs5qflhu.js","/_next/static/immutable/chunks/0-6vu2ul1h6ld.js","/_next/static/immutable/chunks/43_s7jweyypoh.js","/_next/static/immutable/chunks/0p6vao205o1jc.js","/_next/static/immutable/chunks/1_kyvgkyokw92.js","/_next/static/immutable/chunks/1lo-zn37dolb5.js","/_next/static/immutable/chunks/1v8k6yxw1rg0u.js"],"RegistryDependencies"] 60:I[314491,["/_next/static/immutable/chunks/3arlv5bvukoo2.js","/_next/static/immutable/chunks/39v64hmfyo-sr.js","/_next/static/immutable/chunks/2nvof3-29tvc3.js","/_next/static/immutable/chunks/3tjobt77z_9dj.js","/_next/static/immutable/chunks/04j_o97cgxn2x.js","/_next/static/immutable/chunks/3upr08c9vtj8w.js","/_next/static/immutable/chunks/1ww0328si-u8x.js","/_next/static/immutable/chunks/11mfl5ymqld9-.js","/_next/static/immutable/chunks/2xxcqy6ppds3l.js","/_next/static/immutable/chunks/1bpgyrs5qflhu.js","/_next/static/immutable/chunks/0-6vu2ul1h6ld.js","/_next/static/immutable/chunks/43_s7jweyypoh.js","/_next/static/immutable/chunks/0p6vao205o1jc.js","/_next/static/immutable/chunks/1_kyvgkyokw92.js","/_next/static/immutable/chunks/1lo-zn37dolb5.js","/_next/static/immutable/chunks/1v8k6yxw1rg0u.js"],"FilesView"] 61:T1d7b,"use client"; import { useEffect, useRef, useState } from "react"; import { useReducedMotion } from "@/hooks/use-reduced-motion"; import { cn } from "@/lib/utils"; // Per-character typing delay: a base plus up to this much jitter, which lands // around 8 to 14 keys a second, the pace of someone who knows the word. const TYPE_BASE = 62; const TYPE_JITTER = 64; // Long enough to read the finished sentence once. const HOLD = 1800; // How long the word sits selected before the first key replaces it: the // beat where a person decides on the new word. Includes the 220ms sweep. const SELECTED_FOR = 620; // Reduced motion swaps whole words on this interval instead of typing. const SWAP_EVERY = 2800; // A macOS-length blink with short fades, rather than a hard on/off flash. // The caret goes solid while keys move and disappears while a selection is // up, as it does in a real text field. // The selection sweeps in from the word's end (shift + option + left) in // 220ms, but vanishes the instant a key replaces it: an editor never fades // a selection out. // Each new letter lands with a 140ms ink-in (opacity and a 2px blur) so a // keystroke reads as struck rather than popped in. const CSS = ` @keyframes typewriter-caret { 0%, 45% { opacity: 1; } 55%, 95% { opacity: 0; } 100% { opacity: 1; } } .typewriter-caret { animation: typewriter-caret 1.06s linear infinite; } [data-typing="true"] .typewriter-caret { animation: none; } [data-selecting="true"] .typewriter-caret { visibility: hidden; } .typewriter-selection { scale: 0 1; transform-origin: right; transition: scale 220ms cubic-bezier(0.23, 1, 0.32, 1); } [data-selecting="false"] .typewriter-selection { transition: none; } [data-selecting="true"] .typewriter-selection { scale: 1 1; } @keyframes typewriter-ink { from { opacity: 0; filter: blur(2px); } } .typewriter-letter { animation: typewriter-ink 140ms cubic-bezier(0.23, 1, 0.32, 1); } @media (prefers-reduced-motion: reduce) { .typewriter-selection { transition: none; } .typewriter-letter { animation: none; } } `; // Deterministic, and smooth from key to key: a slow wave carries a rhythm // through the word and a small hash roughens it, so delays vary the way a // hand does instead of jumping between extremes. function jitter(word: number, char: number) { const wave = Math.sin(char * 1.9 + word * 2.7) * 0.5 + 0.5; const n = Math.sin(char * 12.9898 + word * 78.233) * 43758.5453; return wave * 0.7 + (n - Math.floor(n)) * 0.3; } export function Typewriter({ prefix, words, className, }: { prefix: string; words: string[]; className?: string; }) { const reduceMotion = useReducedMotion(); const rootRef = useRef(null); const textRef = useRef(null); const [swapIndex, setSwapIndex] = useState(0); // Typing writes straight to the DOM, so a keystroke never re-renders React. useEffect(() => { if (reduceMotion) return; const root = rootRef.current; const text = textRef.current; if (!root || !text || words.length === 0) return; let word = 0; let length = words[0].length; let timer: ReturnType; const strike = (char: string) => { const letter = document.createElement("span"); letter.className = "typewriter-letter"; letter.textContent = char; text.append(letter); }; const type = () => { const target = words[word]; if (length < target.length) { strike(target[length]); length++; } const finished = length === target.length; // Solid while keys are moving, blinking while it waits. root.dataset.typing = String(!finished); timer = finished ? setTimeout(select, HOLD) : setTimeout(type, TYPE_BASE + jitter(word, length) * TYPE_JITTER); }; // Rewrites the way people do: select the word, then type over it. The // first key replaces the whole selection at once. const select = () => { if (words.length < 2) return; root.dataset.selecting = "true"; timer = setTimeout(() => { word = (word + 1) % words.length; length = 0; text.textContent = ""; root.dataset.selecting = "false"; type(); }, SELECTED_FOR); }; // Starts on the finished first word, which is also what the server // rendered, so nothing flashes empty before hydration. root.dataset.typing = "false"; timer = setTimeout(select, HOLD); return () => { clearTimeout(timer); // Leaves the DOM as React rendered it, so a words change or remount // starts clean instead of from a half typed, selected word. text.textContent = words[0] ?? ""; root.dataset.selecting = "false"; }; }, [reduceMotion, words]); useEffect(() => { if (!reduceMotion || words.length < 2) return; const id = setInterval( () => setSwapIndex((i) => (i + 1) % words.length), SWAP_EVERY, ); return () => clearInterval(id); }, [reduceMotion, words.length]); const longest = words.reduce((a, b) => (b.length > a.length ? b : a), ""); const sentence = `${prefix} ${new Intl.ListFormat("en", { type: "disjunction", }).format(words)}.`; return ( {sentence} {/* Reserves the widest state, so the line is laid out once and the prefix never moves as the word grows to the right. */} {prefix} {longest} {prefix}{" "} {reduceMotion ? ( {words.map((w, i) => ( {w} ))} ) : ( <> {/* A text selection highlight: the ink stays, a tinted block sits behind it. Slightly taller than the glyphs, like the line box a browser paints. */} {words[0]} )} ); } function Caret() { return ( ); } const WORDS = ["right", "fast", "alive", "effortless"]; export default function TypewriterDemo() { return (

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