> For the complete documentation index, see [llms.txt](https://doc.batch.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.batch.com/developer/sdk/web/profile-data/topic-preferences.md).

# Topic preferences

The Batch Web SDK allows you to:

* Add or remove topic preferences from a user profile (the profile is created automatically if it doesn’t already exist).
* Partially update topic preferences within a user profile.

> Requires SDK 4.3+

Here’s how to update topic preferences:

{% tabs %}
{% tab title="JavaScript (ES8)" %}

```javascript
batchSDK(async api => {
    const profile = await api.profile();
    await profile.edit(editor => {
      editor.setTopicPreferences(["technology", "finance"]) // null to erase
      // Alternatively, partially update them with:
      editor.addToTopicPreferences(["investing"])
      editor.removeFromTopicPreferences(["travel"])
    })
});
```

{% endtab %}

{% tab title="JavaScript" %}

<pre class="language-javascript"><code class="lang-javascript">batchSDK(api => {
    api.profile().then(profile => {
<strong>      profile.edit(editor => {
</strong>          editor.setTopicPreferences(["technology", "finance"]) // null to erase
          // Alternatively, partially update them with:
          editor.addToTopicPreferences(["investing"])
          editor.removeFromTopicPreferences(["travel"])
      })
    })
});
</code></pre>

{% endtab %}
{% endtabs %}

{% hint style="info" %}
**Note**: Topics must be a valid List of String not longer than 25 items. String should be made of letters, numbers or underscores (\[a-z0-9\_]) and can't be longer than 300 characters.
{% endhint %}


---

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