# Measure your own widget

> Built your own upsell widget? Tie the lines it adds to an AndOr upsell offer with one line property.

Source: https://backtrackhq.com/docs/developers/measure-your-own-widget/

Built your own widget instead of using AndOr's? Your design can still
use AndOr's numbers. You keep your markup and your add to cart. AndOr
counts the results.

## What you get

- **Discount results, with any widget.** When a shopper uses an AndOr
  discount, AndOr counts it from your store's orders. That works with
  any add to cart, your theme's own included. Nothing to add.
- **Orders and revenue, credited to an offer.** Mark the lines your
  widget adds with an AndOr upsell offer's ID. AndOr then credits those
  orders to that offer, the same as its own widgets. You see orders,
  revenue and the offer's row in the tables.

The offer can be any upsell offer you already have, for example a
Bundle offer. No special type is needed.

## Credit orders to an offer

1. **Copy the offer ID.**

   Open the offer in AndOr and copy its ID from the offer page.

2. **Add it to your add to cart as a line property.**

   Set the property `_andor_offer_id` to the offer's ID on every line
   your widget adds.

   With JavaScript:

   ```js
   await fetch('/cart/add.js', {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
     body: JSON.stringify({
       items: [{
         id: variantId,
         quantity: 1,
         properties: { _andor_offer_id: 'OFFER_ID' },
       }],
     }),
   });
   ```

   In a product form:

   ```html
   <input type="hidden" name="properties[_andor_offer_id]" value="OFFER_ID">
   ```

   Replace `OFFER_ID` with the ID you copied.

3. **Place a test order.**

   Order numbers show in AndOr within a day.

Shopify hides line properties that start with an underscore at
checkout. See
[The `_andor_offer_id` line property](https://backtrackhq.com/docs/developers/cart-updates/#the-_andor_offer_id-line-property).

## Not covered yet

- **Views and adds for your own widgets: coming soon.** AndOr counts
  views, clicks and adds only for its own widgets today.

## Where to see the numbers

- The offer's row in **By upsell offer** on the **Analytics** page.
- The offer's details on the **Upsell offers** tab.

See [Analytics overview](https://backtrackhq.com/docs/analytics/overview/) and
[How we count](https://backtrackhq.com/docs/analytics/how-we-count/).