selector.selected

The shopper picked another option, or switched a toggle on.

CODE

next.on('selector.selected', (data, event) => {});

Data

Present: always; optional when it may be missing; campaign once the campaign is loaded; priced once the server priced the cart.

Field	Type	Present
`price`	`number`	priced	`total ÷ quantity`: one package, after discounts.
`original_price`	`number`	priced	`subtotal ÷ quantity`: one package, before discounts.
`subtotal`	`number`	priced	What it costs before discounts.
`total_discount`	`number`	priced	`subtotal − total`.
`discount_percentage`	`number`	priced	`total_discount ÷ subtotal × 100`, to two decimals.
`selector_id`	`string`	always	`data-next-selector-id`, or `toggle:<package_id>` for a toggle.
`type`	`"bundle"` \| `"offer"` \| `"toggle"`	always
`option_id`	`string`	optional	The picked option's `data-next-bundle-id`; none for a toggle.
`lines`	`CartItem[]`	always	The lines the picked option puts in the cart, at its quantity; the toggle's line for a toggle. Priced once the option has a price.
`currency`	`string`	campaign	ISO 4217, such as `USD`.
`total`	`number`	priced	What the picked option costs after discounts.
`quantity`	`number`	always	Packages the picked option adds.
`in_cart`	`boolean`	always	`true` while the picked option's lines are in the cart.
`options`	`SelectorOption[]`	optional	Every option of a bundle or offer selector; none for a toggle.

CartItem

A line of the cart. Its prices are there once the server priced the cart.

Field	Type	Present
`package_id`	`number`	always	The package's `ref_id` in the campaign.
`quantity`	`number`	always	Package quantity.
`is_upsell`	`boolean`	optional	`true` for a line added after the order.
`properties`	`Record<string, string>`	optional	Line properties, such as a variant picked in a bundle slot.
`product_id`	`number`	campaign	The product in the store.
`product_title`	`string`	campaign	The product's name as customers see it, as on an order line; the package's name for a package without one.
`variant_id`	`number`	campaign	The product variant, for a product with variants.
`variant_title`	`string`	campaign	The variant's name, such as `Black / M`, for a product with variants.
`sku`	`string`	campaign	The product's Stock Keeping Unit.
`image`	`string`	campaign	The package's image URL.
`price`	`number`	priced	What one package costs after discounts.
`original_price`	`number`	priced	What one package costs before discounts; equal to `price` when nothing is taken off.
`total_discount`	`number`	priced	The discount on the line.
`total`	`number`	priced	`price × quantity`.
`subtotal`	`number`	priced	The line before discounts: `total = subtotal − total_discount`.
`discount_percentage`	`number`	priced	`total_discount ÷ subtotal × 100`, to two decimals; `0` without a discount.
`discounts`	`Discount[]`	priced	The discounts on the line.
`subscription`	`Subscription`	campaign	For a package billed again every interval.

SelectorOption

One option of a selector, at the quantity it would be added.

Field	Type	Present
`price`	`number`	priced	`total ÷ quantity`: one package, after discounts.
`original_price`	`number`	priced	`subtotal ÷ quantity`: one package, before discounts.
`subtotal`	`number`	priced	What it costs before discounts.
`total_discount`	`number`	priced	`subtotal − total`.
`discount_percentage`	`number`	priced	`total_discount ÷ subtotal × 100`, to two decimals.
`option_id`	`string`	always	The option's `data-next-bundle-id`, or `data-next-option`.
`lines`	`CartItem[]`	always	The lines the option puts in the cart. Priced once the option has a price.
`quantity`	`number`	always	Packages the option adds: its lines' quantities.
`selected`	`boolean`	always	`true` for the selector's picked option.
`total`	`number`	priced	What the option costs after discounts.
`original_total`	`number`	priced	What the option costs before discounts.

Discount

A discount on the cart's products or on its shipping. Amounts are in the cart's currency.

Field	Type	Present
`name`	`string`	always	The offer's name.
`amount`	`number`	always	The amount taken off.
`source`	`"offer"` \| `"coupon"`	always	`coupon` for a code the shopper entered (it is in `coupons`); `offer` for an automatic offer or a bundle card's own code.
`code`	`string`	optional	The code, for a coupon.
`offer_id`	`number`	always	The offer that gave it.
`percentage`	`number`	optional	The percentage the offer is set to take off, as the API reports it, such as `20`. Its configured value, for a label such as “20% off”; the amount actually taken off is `amount`.

Subscription

A package billed again every interval.

Field	Type	Present
`interval`	`"day"` \| `"month"`	always	The unit of the renewal interval.
`interval_count`	`number`	always	How many `interval`s between renewals.
`price`	`number`	priced	What each renewal charges, after discounts.
`original_price`	`number`	priced	What each renewal charges before discounts.

Example

The second argument, with data inside. See Events for the envelope's fields.

CODE

{
  "event_id": "3f2b8c1d9e7a4b6c8d5e2f1a0b9c8d7e",
  "event_type": "selector.selected",
  "object": "selector",
  "data": {
    "selector_id": "main",
    "type": "bundle",
    "option_id": "two",
    "lines": [
      {
        "package_id": 2,
        "quantity": 1,
        "product_id": 400,
        "product_title": "Olympus Earbuds",
        "variant_id": 4002,
        "variant_title": "Black",
        "image": "https://cdn.test/2.png"
      }
    ],
    "currency": "USD",
    "quantity": 1,
    "in_cart": false,
    "options": [
      {
        "option_id": "one",
        "lines": [
          {
            "package_id": 1,
            "quantity": 1,
            "product_id": 400,
            "product_title": "Olympus Earbuds",
            "variant_id": 4001,
            "variant_title": "Black",
            "image": "https://cdn.test/1.png"
          }
        ],
        "quantity": 1,
        "selected": false
      },
      {
        "option_id": "two",
        "lines": [
          {
            "package_id": 2,
            "quantity": 1,
            "product_id": 400,
            "product_title": "Olympus Earbuds",
            "variant_id": 4002,
            "variant_title": "Black",
            "image": "https://cdn.test/2.png"
          }
        ],
        "quantity": 1,
        "selected": true
      }
    ]
  },
  "created_at": "2026-11-04T08:30:00.000Z",
  "session_id": "0b8f3c2d1e4a4f6b9c7d5e3f2a1b0c9d",
  "sdk_version": "0.5.0"
}