---
title: Full-stack
slug: full-stack
docTags: 
createdAt: 2025-05-22T11:39:54.540Z
---

Full-stack A/B campaigns allow using Personizely's JS API to run custom changes right within your code.

## Configuration

Editing each variation opens up a view where you can enable or disable features and define parameter values that will later be used on the frontend.

## Usage

To run the full-stack campaign in your code, Personizely exposes the following functions.

`ply.runCampaign(id)` 

This method runs a campaign and returns the campaign `variation` instance if not on control, and null if the user falls into the control group (make sure the campaign you are running is of a full-stack type)

`id` - the campaign ID (you can find it in the address bar when editing the campaign)

`variation.getFeature(key)`

Returns the `feature` instance within the variation.

`key` - the `feature` key as specified when creating it



`feature.isEnabled()`

Returns `true` or `false` depending on whether the `feature` is enabled for the current `variation`.



`feature.getParameter(key)`

Returns the `value` of the parameter of the `feature` within the current `variation`.

`key` - the key of the parameter as specified when defining the variation

### Example

```javascript
const variation = ply.runCampaign(1); // 1 is the campaign id
if (variation) {
  const cartFeature = variation.getFeature('cart'); // is the feature id/key
  if (cartFeature.isEnabled()) {
      const message = cartFeature.getParameterValue('message'); // message is the feature parameter
      this.notification.querySelector('.cart-notification__heading').childNodes[1].textContent = message;
  }
}
```