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(function () { |
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function animateFunnel(wrap) { |
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var stages = wrap.querySelectorAll('.bkbg-fn-stage-bar'); |
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stages.forEach(function (stage) { |
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var targetWidth = stage.dataset.targetWidth; |
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if (!targetWidth) return; |
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stage.style.width = '0%'; |
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stage.style.opacity = '0'; |
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stage.style.transition = 'none'; |
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requestAnimationFrame(function () { |
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requestAnimationFrame(function () { |
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stage.style.transition = 'width 0.55s cubic-bezier(0.25,0.8,0.25,1), opacity 0.3s'; |
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stage.style.width = targetWidth; |
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stage.style.opacity = '1'; |
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}); |
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}); |
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}); |
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} |
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|
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function init() { |
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var wraps = document.querySelectorAll('.bkbg-fn-card'); |
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if (!wraps.length) return; |
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|
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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) return; |
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animateFunnel(entry.target); |
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observer.unobserve(entry.target); |
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}); |
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}, { threshold: 0.15 }); |
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|
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wraps.forEach(function (wrap) { |
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/* Prepare target widths from inline style, then reset to 0 for animation */ |
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var stages = wrap.querySelectorAll('.bkbg-fn-stage-bar'); |
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stages.forEach(function (stage) { |
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var currentW = stage.style.width || '100%'; |
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stage.dataset.targetWidth = currentW; |
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stage.style.width = '0%'; |
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stage.style.opacity = '0'; |
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}); |
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observer.observe(wrap); |
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}); |
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} |
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|
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if (document.readyState === 'loading') { |
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document.addEventListener('DOMContentLoaded', init); |
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} else { |
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init(); |
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} |
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})(); |
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|
