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/** |
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* Merchant Scroll To. |
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* |
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*/ |
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|
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'use strict'; |
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|
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var merchant = merchant || {}; |
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merchant.scrollTo = { |
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domReady: function domReady(fn) { |
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if (typeof fn !== 'function') { |
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return; |
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} |
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if (document.readyState === 'interactive' || document.readyState === 'complete') { |
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return fn(); |
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} |
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document.addEventListener('DOMContentLoaded', fn, false); |
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}, |
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init: function init() { |
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var elements = document.querySelectorAll('[data-merchant-scroll-to]'); |
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if ('null' === typeof elements) { |
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return; |
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} |
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elements.forEach(function (el) { |
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el.addEventListener('click', function (event) { |
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event.preventDefault(); |
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merchant.scrollTo.scrollTo(el); |
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}); |
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}); |
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}, |
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scrollTo: function scrollTo(el) { |
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var scrollToSelector = el.getAttribute('data-merchant-scroll-to'); |
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var scrollToOffset = el.getAttribute('data-merchant-scroll-to-offset') || 0; |
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if (!scrollToSelector) { |
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return; |
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} |
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var elClientRect = document.querySelector(scrollToSelector).getBoundingClientRect(); |
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var scrollPosition = parseInt(elClientRect.top + window.pageYOffset - scrollToOffset); |
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window.dispatchEvent(new Event('mrc-scrollto.before.scrolling'), { |
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eventData: { |
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context: el |
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} |
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}); |
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window.scrollTo({ |
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top: scrollPosition, |
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behavior: 'smooth' |
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}); |
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setTimeout(function () { |
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window.dispatchEvent(new Event('mrc-scrollto.after.scrolling', { |
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eventData: { |
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context: el |
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} |
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})); |
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}, 500); |
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} |
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}; |
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|
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// Initialize. |
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merchant.scrollTo.domReady(function () { |
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merchant.scrollTo.init(); |
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}); |
