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(function () { |
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'use strict'; |
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|
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document.addEventListener('DOMContentLoaded', function () { |
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/* Animate panels in when they scroll into view */ |
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if (!('IntersectionObserver' in window)) return; |
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|
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document.querySelectorAll('.bkbg-sct-section').forEach(function (section) { |
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var panels = section.querySelectorAll('.bkbg-sct-panel'); |
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if (!panels.length) return; |
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|
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var observed = false; |
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var observer = new IntersectionObserver(function (entries) { |
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entries.forEach(function (entry) { |
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if (entry.isIntersecting && !observed) { |
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observed = true; |
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panels.forEach(function (panel, i) { |
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panel.style.opacity = '0'; |
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panel.style.transform = 'translateY(18px)'; |
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panel.style.transition = 'opacity 0.45s ease ' + (i * 0.12) + 's, transform 0.45s ease ' + (i * 0.12) + 's'; |
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requestAnimationFrame(function () { |
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requestAnimationFrame(function () { |
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panel.style.opacity = '1'; |
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panel.style.transform = 'translateY(0)'; |
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}); |
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}); |
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}); |
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observer.disconnect(); |
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} |
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}); |
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}, { threshold: 0.15 }); |
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|
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observer.observe(section); |
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}); |
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}); |
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})(); |
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|
