26 lines
999 B
JavaScript
26 lines
999 B
JavaScript
// Umami: safe track (no-op if script blocked or not loaded)
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function umamiTrack(name, data) {
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if (typeof window.umami !== 'undefined' && typeof window.umami.track === 'function') {
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if (data != null) window.umami.track(name, data);
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else window.umami.track(name);
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}
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}
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// Umami: scroll depth (25%, 50%, 75%, 100%) – once per milestone
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const scrollMilestones = new Set();
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function onScroll() {
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const doc = document.documentElement;
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const scrollTop = doc.scrollTop || document.body.scrollTop;
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const scrollHeight =
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(doc.scrollHeight || document.body.scrollHeight) - window.innerHeight;
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if (scrollHeight <= 0) return;
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const pct = Math.round((scrollTop / scrollHeight) * 100);
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for (const m of [25, 50, 75, 100]) {
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if (pct >= m && !scrollMilestones.has(m)) {
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scrollMilestones.add(m);
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umamiTrack('scroll-depth', { depth: String(m) });
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}
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}
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}
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window.addEventListener('scroll', onScroll, { passive: true });
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