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(function () { 'use strict'; // Source: https://developers.google.com/speed/webp/faq#in_your_own_javascript. function check_feature(feature, callback) { const testImages = { webp: "data:image/webp;base64,UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAARBxAR/Q9ERP8DAABWUDggGAAAABQBAJ0BKgEAAQAAAP4AAA3AAP7mtQAAAA==", avif: "data:image/avif;base64,AAAAIGZ0eXBhdmlmAAAAAGF2aWZtaWYxbWlhZk1BMUIAAADybWV0YQAAAAAAAAAoaGRscgAAAAAAAAAAcGljdAAAAAAAAAAAAAAAAGxpYmF2aWYAAAAADnBpdG0AAAAAAAEAAAAeaWxvYwAAAABEAAABAAEAAAABAAABGgAAAB0AAAAoaWluZgAAAAAAAQAAABppbmZlAgAAAAABAABhdjAxQ29sb3IAAAAAamlwcnAAAABLaXBjbwAAABRpc3BlAAAAAAAAAAIAAAACAAAAEHBpeGkAAAAAAwgICAAAAAxhdjFDgQ0MAAAAABNjb2xybmNseAACAAIAAYAAAAAXaXBtYQAAAAAAAAABAAEEAQKDBAAAACVtZGF0EgAKCBgANogQEAwgMg8f8D///8WfhwB8+ErK42A=" }; const img = new Image(); img.onload = function () { const result = (img.width > 0) && (img.height > 0); callback(result); }; img.onerror = function () { callback(false); }; img.src = testImages[feature]; } function make_callback(fallbackAttributeName, dataValueName, extension) { return function (isNextGenSupported) { document.documentElement.classList.add(isNextGenSupported ? extension : 'no-' + extension); if (isNextGenSupported) { return; } const originalGetAttribute = Object.getOwnPropertyDescriptor(Element.prototype, 'getAttribute'); // Redefine the getAttribute function with a custom implementation Object.defineProperty(Element.prototype, 'getAttribute', { value: function (attributeName) { if (!this.dataset.hasOwnProperty(dataValueName)) { return originalGetAttribute.value.call(this, attributeName); } const fallbackObject = JSON.parse(this.dataset[dataValueName]); if (attributeName in fallbackObject) { return fallbackObject[attributeName]; } return originalGetAttribute.value.call(this, attributeName); } }); const elementsWithFallback = document.querySelectorAll('[' + fallbackAttributeName + ']:not(.lazyload)'); if (elementsWithFallback.length) { // Update background image, src, srcset. const imageDisplayAttrs = ['src', 'srcset']; elementsWithFallback.forEach((element) => { const fallbackObject = JSON.parse(element.dataset[dataValueName]); imageDisplayAttrs.forEach(function (attrName) { if (attrName in fallbackObject) { element.setAttribute(attrName, fallbackObject[attrName]); } }); // Update background image. if ('bg' in fallbackObject) { element.style.background = fallbackObject.bg; } if ('bg-image' in fallbackObject) { element.style.backgroundImage = fallbackObject['bg-image']; } }); } }; } if (wp_smushit_nextgen_data?.mode === 'avif') { check_feature('avif', make_callback('data-smush-avif-fallback', 'smushAvifFallback', 'avif')); } else { check_feature('webp', make_callback('data-smush-webp-fallback', 'smushWebpFallback', 'webp')); } })();

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