I posted the code below (w/the notes) to the very bottom of theme.js.liquid but it did not work. It just made all my product images tinted white and unclickable. Can anyone see where it went wrong?
//code for making sure when clicking on an image the correct variant is selected
//Variant By Clicking Their Image - 2022 Free Shopify Tutorial - Andrew from EcomExperts
//https://ecomexperts.io/blogs/liquid-tutorial-shopify/select-variants-by-clicking-their-images-shopify-tutorial
const selectVariantByClickingImage = {
// Create variant images from productJson object
_createVariantImage: function (product) {
const variantImageObject = {};
product.variants.forEach((variant) => {
if (
typeof variant.featured_image !== ‘undefined’ &&
variant.featured_image !== null
) {
const variantImage = variant.featured_image.src
.split(‘?’)[0]
.replace(/http(s)?:/, ‘’);
variantImageObject[variantImage] =
variantImageObject[variantImage] || {};
product.options.forEach((option, index) => {
const optionValue = variant.options[index];
const optionKey = option-${index};
if (
typeof variantImageObject[variantImage][optionKey] === ‘undefined’
) {
variantImageObject[variantImage][optionKey] = optionValue;
} else {
const oldValue = variantImageObject[variantImage][optionKey];
if (oldValue !== null && oldValue !== optionValue) {
variantImageObject[variantImage][optionKey] = null;
}
}
});
}
},
_updateVariant: function (event, id, product, variantImages) {
const arrImage = event.target.src
.split(‘?’)[0]
.replace(/http(s)?:/, ‘’)
.split(‘.’);
const strExtention = arrImage.pop();
const strRemaining = arrImage.pop().replace(/_[a-zA-Z0-9@]+$/, ‘’);
const strNewImage = ${arrImage.join('.')}.${strRemaining}.${strExtention};
if (typeof variantImages[strNewImage] !== ‘undefined’) {
product.variants.forEach((option, index) => {
const optionValue = variantImages[strNewImage][option-${index}];
if (optionValue !== null && optionValue !== undefined) {
const selects = document.querySelectorAll(‘#’+ id + ’ [class*=single-option-selector]');
const options = selects[index].options;
for (let option, n = 0; (option = options[n]); n += 1) {
if (option.value === optionValue) {
selects[index].selectedIndex = n;
selects[index].dispatchEvent(new Event(‘change’));
break;
}
}
}
});
}
},
_selectVariant: function() {
const productJson = document.querySelectorAll(‘[id^=ProductJson-’);
if (productJson.length > 0) {
productJson.forEach((product) => {
const sectionId = product.id.replace(“ProductJson-”, “shopify-section-”);
const thumbnails = document.querySelectorAll(‘#’+ sectionId + ’ img[src*=“/products/”]');
if (thumbnails.length > 1) {
const productObject = JSON.parse(product.innerHTML);
const variantImages = this._createVariantImage(productObject);
// need to check variants > 1
if (productObject.variants.length > 1) {
thumbnails.forEach((thumbnail) => {
thumbnail.addEventListener(‘click’, (e) =>
this._updateVariant(e, sectionId, productObject, variantImages),
);
});
}
}
});
}
},
};
if (document.readyState !== ‘loading’) {
selectVariantByClickingImage._selectVariant();
} else {
document.addEventListener(
‘DOMContentLoaded’,
selectVariantByClickingImage._selectVariant(),
);
}