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(function () { |
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'use strict'; |
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|
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document.querySelectorAll('.bkbg-tc-wrapper').forEach(function (wrapper) { |
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if (!('IntersectionObserver' in window)) return; |
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|
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var leftCol = wrapper.querySelector('.bkbg-tc-col--left'); |
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var rightCol = wrapper.querySelector('.bkbg-tc-col--right'); |
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|
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if (leftCol) { |
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leftCol.style.opacity = '0'; |
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leftCol.style.transform = 'translateX(-28px)'; |
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leftCol.style.transition = 'opacity 0.55s ease, transform 0.55s ease'; |
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} |
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if (rightCol) { |
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rightCol.style.opacity = '0'; |
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rightCol.style.transform = 'translateX(28px)'; |
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rightCol.style.transition = 'opacity 0.55s ease 0.1s, transform 0.55s ease 0.1s'; |
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} |
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|
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var observed = false; |
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var io = new IntersectionObserver(function (entries) { |
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entries.forEach(function (entry) { |
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if (!entry.isIntersecting || observed) return; |
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observed = true; |
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if (leftCol) { leftCol.style.opacity = '1'; leftCol.style.transform = 'translateX(0)'; } |
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if (rightCol) { rightCol.style.opacity = '1'; rightCol.style.transform = 'translateX(0)'; } |
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io.disconnect(); |
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}); |
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}, { threshold: 0.1 }); |
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|
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if (leftCol) io.observe(leftCol); |
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if (rightCol) io.observe(rightCol); |
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}); |
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})(); |
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|
