---
updatedAt: 2026-06-11T13:39:34.000Z
agentTools:
  projectIndex: https://developers.wingify.com/llms.txt
---

# Set SDK Environment

Setting up the environment for your application is critical. We strongly recommend you to use this setting carefully. The default environment is set to **production**, which means that the Wingify SDK will send events to the Wingify server for tracking visitors and conversions along with actions like bucketing variation, checking eligibility of a user to become part of a campaign, assigning a variation to a user, and so on.

<Table align={["left","left","left"]}>
  <thead>
    <tr>
      <th style={{ textAlign: "left" }}>
        Environment
      </th>

      <th style={{ textAlign: "left" }}>
        Type
      </th>

      <th style={{ textAlign: "left" }}>
        Default
      </th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td style={{ textAlign: "left" }}>
        isDevelopmentMode
      </td>

      <td style={{ textAlign: "left" }}>
        Boolean
      </td>

      <td style={{ textAlign: "left" }}>
        false
      </td>
    </tr>
  </tbody>
</Table>

> 🚧 NOTE
>
> You must set the environment to ***isDevelopmentMode: true*** if you're experimenting with the SDK.

```javascript JavaScript
var settingsFile = await vwoSDK.getSettingsFile(accountId, sdkKey);

var vwoClientInstance = vwoSDK.launch({
  isDevelopmentMode: true, // Set this for DEVELOPMENT
  settingsFile: settingsFile
});
```