https://xperf.ai/xperf-clusterready.js?v=20260811-title-wipe-v1

1(() => {
2  "use strict";
3
4  const reduceMotion = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
5
6  function prepareTitleReveal(element) {
7    const original = (element.textContent || "").replace(/\s+/g, " ").trim();
8    if (!original) return false;
9
10    const words = original.split(" ");
11    const measurement = document.createDocumentFragment();
12    words.forEach((word, index) => {
13      const span = document.createElement("span");
14      span.className = "cr-title-reveal__measure";
15      span.textContent = word;
16      measurement.append(span);
17      if (index < words.length - 1) {
18        measurement.append(document.createTextNode(" "));
19      }
20    });
21    element.replaceChildren(measurement);
22
23    const measuredWords = [...element.querySelectorAll(".cr-title-reveal__measure")];
24    const lines = [];
25    measuredWords.forEach((word) => {
26      const offset = Math.round(word.offsetTop);
27      const current = lines.at(-1);
28      if (!current || Math.abs(current.offset - offset) > 1) {
29        lines.push({ offset, words: [word.textContent] });
30      } else {
31        current.words.push(word.textContent);
32      }
33    });
34
35    const fragment = document.createDocumentFragment();
36    lines.forEach(({ words }) => {
37      const wrapper = document.createElement("span");
38      const line = document.createElement("span");
39      const box = document.createElement("span");
40      wrapper.className = "cr-title-reveal__line-wrapper";
41      wrapper.setAttribute("aria-hidden", "true");
42      line.className = "cr-title-reveal__line";
43      line.textContent = words.join(" ");
44      box.className = "cr-title-reveal__box";
45      wrapper.append(line, box);
46      fragment.append(wrapper);
47    });
48
49    element.setAttribute("aria-label", original);
50    element.replaceChildren(fragment);
51    element.classList.add("is-title-ready");
52    return true;
53  }
54
55  async function setupTitleReveals() {
56    const titles = [...document.querySelectorAll("[data-cr-title-reveal]")];
57    if (!titles.length || reduceMotion) return;
58
59    document.documentElement.classList.add("cr-title-motion");
60    try {
61      if (document.fonts?.ready) await document.fonts.ready;
62    } catch {
63      // The system font fallback still provides stable line measurements.
64    }
65
66    const prepared = titles.filter(prepareTitleReveal);
67    if (!prepared.length) return;
68
69    if (!("IntersectionObserver" in window)) {
70      prepared.forEach((title) => title.classList.add("is-title-revealed"));
71      return;
72    }
73
74    const observer = new IntersectionObserver(
75      (entries) => {
76        entries.forEach((entry) => {
77          if (!entry.isIntersecting) return;
78          entry.target.classList.add("is-title-revealed");
79          observer.unobserve(entry.target);
80        });
81      },
82      { threshold: 0 },
83    );
84
85    prepared.forEach((title) => observer.observe(title));
86  }
87
88  function setupReveals() {
89    const items = [...document.querySelectorAll("[data-cr-reveal]")];
90    if (!items.length) return;
91
92    if (reduceMotion) {
93      items.forEach((item) => item.classList.add("is-visible"));
94      return;
95    }
96
97    if (!("IntersectionObserver" in window)) {
98      items.forEach((item) => item.classList.add("is-visible"));
99      return;
100    }
101
102    document.documentElement.classList.add("cr-motion");
103    const observer = new IntersectionObserver(
104      (entries) => {
105        entries.forEach((entry) => {
106          if (!entry.isIntersecting) return;
107          entry.target.classList.add("is-visible");
108          observer.unobserve(entry.target);
109        });
110      },
111      { rootMargin: "0px 0px -10%", threshold: 0.08 },
112    );
113
114    items.forEach((item) => observer.observe(item));
115  }
116
117  function setupProcessDeck() {
118    const deck = document.querySelector("[data-cr-process-deck]");
119    const stages = [...(deck?.querySelectorAll("[data-cr-stage]") ?? [])];
120    if (!deck || !stages.length) return;
121
122    let activeIndex = 0;
123
124    function setActive(index, moveFocus = false) {
125      const next = Math.max(0, Math.min(stages.length - 1, index));
126      activeIndex = next;
127

128      stages.forEach((stage, stageIndex) => {
129        const isActive = stageIndex === activeIndex;
130        stage.dataset.state = isActive ? "open" : "closed";
131        stage.setAttribute("aria-expanded", String(isActive));
132        if (isActive) {
133          stage.setAttribute("aria-current", "step");
134        } else {
135          stage.removeAttribute("aria-current");
136        }
137      });
138      if (moveFocus) stages[activeIndex]?.focus();
139    }
140
141    stages.forEach((stage, index) => {
142      stage.addEventListener("click", () => setActive(index));
143      stage.addEventListener("focus", () => setActive(index));
144      stage.addEventListener("pointerenter", () => {
145        if (window.matchMedia("(hover: hover) and (pointer: fine)").matches) setActive(index);
146      });
147      stage.addEventListener("keydown", (event) => {
148        let next = null;
149        if (event.key === "ArrowRight" || event.key === "ArrowDown") next = (index + 1) % stages.length;
150        if (event.key === "ArrowLeft" || event.key === "ArrowUp") next = (index - 1 + stages.length) % stages.length;
151        if (event.key === "Home") next = 0;
152        if (event.key === "End") next = stages.length - 1;
153        if (event.key === "Enter" || event.key === " ") next = index;
154        if (next === null) return;
155        event.preventDefault();
156        setActive(next, true);
157      });
158    });
159
160    setActive(0);
161  }
162
163  function init() {
164    void setupTitleReveals();
165    setupReveals();
166    setupProcessDeck();
167  }
168
169  if (document.readyState === "loading") {
170    document.addEventListener("DOMContentLoaded", init, { once: true });
171  } else {
172    init();
173  }
174})();