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(function () { |
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'use strict'; |
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|
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var LOTTIE_CDN = 'https://cdnjs.cloudflare.com/ajax/libs/lottie-web/5.12.2/lottie.min.js'; |
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|
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function loadScript(src, cb) { |
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if (window.lottie) { cb(); return; } |
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var s = document.createElement('script'); |
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s.src = src; |
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s.onload = cb; |
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s.onerror = function () { console.warn('Blockenberg: failed to load Lottie from', src); }; |
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document.head.appendChild(s); |
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} |
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|
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function initLottie(outer) { |
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var src = outer.dataset.src || ''; |
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var trigger = outer.dataset.trigger || 'autoplay'; |
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var loop = outer.dataset.loop !== '0'; |
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var speed = parseFloat(outer.dataset.speed || '1') || 1; |
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var direction = parseInt(outer.dataset.direction || '1', 10) || 1; |
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var keepFrame = outer.dataset.keepFrame === '1'; |
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|
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if (!src) return; |
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|
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var container = outer.querySelector('.bkbg-lt-player'); |
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if (!container) return; |
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|
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var anim = null; |
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|
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function createAnim(autoStart) { |
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anim = window.lottie.loadAnimation({ |
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container : container, |
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renderer : 'svg', |
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loop : loop, |
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autoplay : autoStart, |
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path : src |
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}); |
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anim.setSpeed(speed); |
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anim.setDirection(direction); |
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|
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if (keepFrame) { |
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anim.addEventListener('complete', function () { |
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anim.goToAndStop(anim.totalFrames - 1, true); |
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}); |
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} |
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} |
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|
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if (trigger === 'autoplay') { |
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createAnim(true); |
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|
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} else if (trigger === 'hover') { |
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createAnim(false); |
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outer.addEventListener('mouseenter', function () { anim && anim.play(); }); |
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outer.addEventListener('mouseleave', function () { anim && anim.pause(); }); |
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|
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} else if (trigger === 'click') { |
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createAnim(false); |
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var isPlaying = false; |
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outer.addEventListener('click', function () { |
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if (!anim) return; |
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if (isPlaying) { |
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anim.pause(); |
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isPlaying = false; |
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} else { |
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anim.play(); |
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isPlaying = true; |
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} |
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}); |
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|
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} else if (trigger === 'scroll') { |
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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) { |
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if (!anim) { |
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createAnim(true); |
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} else { |
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anim.play(); |
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} |
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if (!loop) io.unobserve(outer); |
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} else if (anim) { |
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anim.pause(); |
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} |
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}); |
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}, { threshold: 0.25 }); |
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io.observe(outer); |
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} |
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} |
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|
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function init() { |
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var wrappers = document.querySelectorAll('.bkbg-lt-outer[data-src]'); |
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if (!wrappers.length) return; |
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loadScript(LOTTIE_CDN, function () { |
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wrappers.forEach(initLottie); |
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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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