Also prevent improper way of shoe wearing which 
${isCart ? 'The items in the shopping cart do not participate in any recommendation rule. Add the participating items to your shopping cart to check the design.' : ''}
${isProduct ? 'This product did not participated in any recommendation rule. Switch to another product to check the design.' : ''}
${isCollection ? 'The items in this collection do not participate in any recommendation rule. Switch the participating items to check the design.' : ''}
${isIndex ? 'The home page do not participate in any recommendation rule.' : ''}
(This prompt would not display on client-side)
Recommended Products
${rule.config.title}
${(function(){
const product = data.product;
const avail_variants = product.variants.filter(function(variant){
return variant.available;
});
const selected_variant = product.min_price_variant.available ? product.min_price_variant : avail_variants.length && avail_variants[0];
return `
`
})()}