You can enhance customer experience by integrating Regios Automatic Discounts deeply with your theme.

To do this, use the DOPP (discount on product page) API. It's a combination of event listeners (which you can fire to trigger updates to our app blocks), and public objects/functions (which you can use to handle the results of calculations yourself).

Public API TypeScript Definition

We highly recommend using TypeScript when working with the API.

You can paste this TypeScript definition into your project as a .d.ts file.

Every single export, including functions, classes, and all their parameters, has a useful documentation comment.

Pro tip: You can paste the contents of this TypeScript file into ChatGPT or Copilot for instant assistance in coding your custom integration.

Public API Example

For a collection of real-world examples, check this article out.

On Product Pages

It's easiest to use the API on the product page, where you don't need to provide a product ID or variant ID by default:

const {salePrice, regularPrice} = await window.RegiosDOPP.api.v0.productPage.calculateDiscountedPrices();
const discountAmount = regularPrice.amount - salePrice.amount;
console.log('Your discounted price: ' + salePrice.formatted);
console.log('Discount amount: ' + discountAmount);

You can also pass a specific variant ID, and/or quantity:

const {salePrice, regularPrice} = await window.RegiosDOPP.api.v0.productPage.calculateDiscountedPrices({
  variantId: 0123456789,
  quantity: 1234,
});

You can also get the discount description/badge content, and CSS:

const {description, badge} = await window.RegiosDOPP.api.v0.productPage.calculateDiscountedPrices();
document.querySelector('.discount-description').innerHTML = description.html;
document.querySelector('.discount-description').style.cssText = description.css;
document.querySelector('.badge').innerHTML = badge.html;

You can also override the customer for a calculation. Set to null to calculate as if no customer is logged in. See the "DOPPCustomer" object type in the Public API TypeScript definition linked above to understand the structure.

const {salePrice, regularPrice} = await window.RegiosDOPP.api.v0.productPage.calculateDiscountedPrices({
  variantId: 0123456789,
  quantity: 1234,
  customer: {
    tags: ["b2b", "wholesale"]
  },
  collectionIds: [1234], // If your discount is based on collections, provide this
});

On Other Pages

On all other pages, use window.RegiosDOPP.api.v0.calculateDiscountedPrices instead of window.RegiosDOPP.api.v0.productPage.calculateDiscountedPrices.

You must provide:
productId - Numeric product ID
variantId - Numeric variant ID
regularPriceInCents - The variant's price, before discounts are applied.

Optional arguments:
collectionIds - An array of numerical IDs of all collections the product belongs to. It's optional, but if your discount depends on knowing a product's collections, you must provide this.
compareAtPriceInCents - The variant's "compare at" price.
handle - The product's handle.
vendor - The product's vendor. If your discount depends on knowing a product's vendor, you must provide this.
url - The product's URL. Example /products/foo
quantity - The quantity of the product being discounted. Defaults to 1.
customer - Override the customer for this calculation. Set to null to calculate as if no customer is logged in. See the "DOPPCustomer" object type in the Public API TypeScript definition linked above to understand the structure.

const {salePrice, regularPrice} = await window.RegiosDOPP.api.v0.calculateDiscountedPrices({
  productId: 0123456789,
  variantId: 0123456789,
  regularPriceInCents: 1234,
  collectionIds: [1234], // If your discount is based on collections, provide this
});
const discountAmount = regularPrice.amount - salePrice.amount;
console.log('Your discounted price: ' + salePrice.formatted);
console.log('Discount amount: ' + discountAmount);

Just like in the productPage API, you can override the customer identity for a single calculation.

const {salePrice, regularPrice} = await window.RegiosDOPP.api.v0.calculateDiscountedPrices({
  variantId: 0123456789,
  quantity: 1234,
  customer: {
    tags: ["b2b", "wholesale"]
  },
  collectionIds: [1234], // If your discount is based on collections, provide this
});

Events

Our app listens to the following events on the window:

Variant Change Event

In case your theme has complex behavior about selecting variants on the product page, you can manually trigger a discount calculation by firing a regios-dopp:variant-change event.

Example

window.dispatchEvent(new CustomEvent("regios-dopp:variant-change", {
    detail: {
        selectedVariant: {
            id: 0123456789,
            price: 3000,
        },
        quantity: 1,
    }
}))

Parameters

All parameters are optional unless stated otherwise.
selectedVariant.id: Required. A product variant's numerical ID.
selectedVariant.price: The variant's price, in cents. You can optionally provide this to change the number we base discount calculations on.
quantity: The quantity of the product to calculate the discount based on. Useful for volume discounts.

Collection Page: New Items Event

When new items are loaded on a collection page, you can manually trigger a discount calculation by firing a regios-dopp:collection-page:new-items event.

This is useful if your theme has a "Load More" button or infinite scrolling instead of traditional pagination.

Example

window.dispatchEvent(new CustomEvent("regios-dopp:collection-page:new-items", {
    detail: {
        uniqueKey: "collection-unique-key",
        newItems: [
            {
                productId: 123456,
                variantId: 654321,
                regularPriceInCents: 2000,
                compareAtPriceInCents: 2500,
                handle: "example-product",
                vendor: "example-vendor",
                url: "/products/example-product",
                tags: ["new", "sale"]
            },
        ]
    }
}));

Parameters

To view the parameters for the regios-dopp:collection-page:new-items event, view the DOPPCollectionPageNewItemsEventDetail type in our TypeScript definition file we provided at the start of this article.

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Updated on: 03/11/2024