Add supporting themes required for Lotusdocs

themes/hugo-mod-jslibs-dist/alpinejs/packages/intersect/src/index.js

@@ -0,0 +1,66 @@
+export default function (Alpine) {
+    Alpine.directive('intersect', Alpine.skipDuringClone((el, { value, expression, modifiers }, { evaluateLater, cleanup }) => {
+        let evaluate = evaluateLater(expression)
+
+        let options = {
+            rootMargin: getRootMargin(modifiers),
+            threshold: getThreshold(modifiers),
+        }
+
+        let observer = new IntersectionObserver(entries => {
+            entries.forEach(entry => {
+                // Ignore entry if intersecting in leave mode, or not intersecting in enter mode
+                if (entry.isIntersecting === (value === 'leave')) return
+
+                evaluate()
+
+                modifiers.includes('once') && observer.disconnect()
+            })
+        }, options)
+
+        observer.observe(el)
+
+        cleanup(() => {
+            observer.disconnect()
+        })
+    }))
+}
+
+function getThreshold(modifiers) {
+    if (modifiers.includes('full')) return 0.99
+    if (modifiers.includes('half')) return 0.5
+    if (! modifiers.includes('threshold')) return 0
+
+    let threshold = modifiers[modifiers.indexOf('threshold') + 1]
+
+    if (threshold === '100') return 1
+    if (threshold === '0') return 0
+
+    return Number(`.${threshold}`)
+}
+
+export function getLengthValue(rawValue) {
+    // Supported: -10px, -20 (implied px), 30 (implied px), 40px, 50%
+    let match = rawValue.match(/^(-?[0-9]+)(px|%)?$/)
+    return match ? match[1] + (match[2] || 'px') : undefined
+}
+
+export function getRootMargin(modifiers) {
+    const key = 'margin'
+    const fallback = '0px 0px 0px 0px'
+    const index = modifiers.indexOf(key)
+
+    // If the modifier isn't present, use the default.
+    if (index === -1) return fallback
+
+    // Grab the 4 subsequent length values after it: x-intersect.margin.300px.0.50%.0
+    let values = []
+        for (let i = 1; i < 5; i++) {
+            values.push(getLengthValue(modifiers[index + i] || ''))
+        }
+
+    // Filter out undefined values (not a valid length)
+    values = values.filter((v) => v !== undefined)
+
+    return values.length ? values.join(' ').trim() : fallback
+}