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(function () { |
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'use strict'; |
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|
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function start() { |
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// The bar is printed on wp_footer, which can run after this script: |
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// wait for the document before looking for it. |
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var bar = document.querySelector('.king-addons-satc'); |
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if (!bar) { |
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return; |
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} |
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|
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var cfg = window.kingAddonsStickyAddToCart || {}; |
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var offset = parseInt(cfg.offset, 10); |
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if (isNaN(offset)) { |
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offset = 400; |
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} |
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|
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// Prefer the real add-to-cart form: the bar earns its place exactly when |
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// the buy button has scrolled out of reach. Without a form on the page, |
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// fall back to a plain scroll offset. |
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var form = document.querySelector('form.cart, .ka-woo-product-atc, #ka-satc-form-anchor'); |
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|
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// Variable products link the bar to #ka-satc-form-anchor. That id is |
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// printed by the Woo Add To Cart widget; a variations form alone never |
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// had it, so the button jumped nowhere. |
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if (form && !document.getElementById('ka-satc-form-anchor')) { |
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form.id = 'ka-satc-form-anchor'; |
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} |
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|
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var button = bar.querySelector('.king-addons-satc__button'); |
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if (button && (button.getAttribute('href') || '').indexOf('#ka-satc-form-anchor') === 0) { |
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button.addEventListener('click', function (event) { |
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var target = document.getElementById('ka-satc-form-anchor') || form; |
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if (!target) { |
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return; |
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} |
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event.preventDefault(); |
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target.scrollIntoView({ behavior: 'smooth', block: 'center' }); |
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}); |
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} |
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|
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bar.hidden = false; |
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|
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function update() { |
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var visible; |
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|
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if (form) { |
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visible = form.getBoundingClientRect().bottom < 0; |
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} else { |
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visible = window.pageYOffset > offset; |
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} |
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|
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bar.classList.toggle('is-visible', visible); |
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} |
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|
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var ticking = false; |
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function onScroll() { |
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if (ticking) { |
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return; |
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} |
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ticking = true; |
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window.requestAnimationFrame(function () { |
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update(); |
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ticking = false; |
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}); |
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} |
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|
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window.addEventListener('scroll', onScroll, { passive: true }); |
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window.addEventListener('resize', onScroll, { passive: true }); |
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update(); |
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} |
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|
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if ('loading' === document.readyState) { |
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document.addEventListener('DOMContentLoaded', start); |
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} else { |
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start(); |
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} |
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})(); |
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|
