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HTML Integration: Category Page (Legacy)

NOTE This section refers to a legacy feature which is only available to existing customers. New and existing customers looking to add personalization should refer to Category Page (JSON)

A category page displays either a subset of related products or a group of sub-categories that help the customer navigate deeper into the site. It may be a department page, genre page, vertical page etc., depending on your nomenclature.

How To Make This Code Work For You

If you copy the sample integration code below, make these changes:

Function Requirement
R3_COMMON.setApiKey('MY_API_KEY'); Replace MY_API_KEY with your site’s API key, a unique identifier for your account.

Set RRSERVER_URL to one of these values.

For initial development:


For production:


R3_COMMON.setSessionId('USER_SESSION_ID'); Replace USER_SESSION_ID with the session ID for the current user and session. The session ID is a crucial variable that allows Algonomy to track shopper behavior when they visit your site so recommendations can be generated. This parameter should remain the same from start to finish for a user’s shopping session.

Replace USER_ID with the user ID, a unique string to identify each user. All user behavior will be stored using this key. It is case-sensitive and should be the same UserId sent to {rr} in other applications.User IDs are often connected to email addresses, and can be directly linked to the login credentials a consumer uses to log into and buy products from the e-commerce site. To avoid sending personally identifiable information to Algonomy, you can use a hash of your site’s user ID (if, for example, your site uses email addresses as user IDs, then you should not send that information directly to Algonomy).

Note: if the USER_ID is unknown, leave it blank.

R3_CATEGORY.setId('CATEGORY_ID'); Replace CATEGORY_ID with a unique identifier for the category.
R3_CATEGORY.setName('CATEGORY_NAME'); Optional: Replace CATEGORY_NAME with a user-friendly name for the category. This name is displayed to shoppers. If you don’t set a category name here, shoppers see the category name value provided in the feed.
R3_COMMON.addItemId('ITEM_ID'); Replace ITEM_ID with an item ID (product ID) for a product shown on the category page. Call R3_COMMON.addItemId()up to 15 times to pass the product IDs of the first 15 products on the page.

No changes are required.

This code enables the client to send the domain for click-through URL through the p13n_generated.js call if relative URLs are supplied in the feed. For example, if the domain calling our code is or, we can automatically redirect to the correct domain.

Sample Integration Code

Primary Code Block

<!-- Place this code inside the <body> element as close to the top as possible -->
<script src="//"></script>
<script charset="utf-8" type="text/javascript">
  var R3_COMMON = new r3_common();
  R3_COMMON.setUserId('1');  // if no user ID is available, please leave this blank
  // here's an example requesting recommendations for 3 page areas
  var R3_CATEGORY = new r3_category();
  R3_CATEGORY.setId('Electronics_BTS'); // category ID must match a category id as passed in catalog feed
  R3_CATEGORY.setName('Back-to-School Electronics'); // category name as it should be displayed to customers, overrides the value provided in the catalog feed for this category ID
  // provide product IDs for items displayed on the category page (LIMIT of 15). Use the following line of code for each product ID.
  R3_COMMON.addItemId('21666189');  // if item has parent ID, pass the parent ID

Placement-marker Code Blocks

<script charset="utf-8" type="text/javascript">
<!-- Page contents -->
<script charset="utf-8" type="text/javascript">
<!-- Page contents -->
<script charset="utf-8" type="text/javascript">

Flush Code Block

<script charset="utf-8" type="text/javascript"> rr_flush_onload();</script>​


  • The values in addPlacementType() should match the values in each r3_placement() call.