The context is a simple JSON object, it is the data that each application uses to identify the current user. This data can then be used to target specific users or groups of users from the Tggl app.

For instance, if you want to enable a feature for all users with an email ending in, the application must pass the user's email as a property of the context. And if you want the feature to be only available to user with the pro plan, your must app pass the plan of the user as a property of the context.

Default properties

By default, new projects on Tggl come with a few properties:

  • userId: The ID of the user in your database
  • email: The email of the user
  • environment: The environment the user is in (staging, production, etc.)

Some properties are also automatically added to the context based on HTTP headers of the request (eg. userAgent, ip, referer, etc...). You can see the full list of properties in you dashboard.

Additionally, you can add any custom property you want to the context right from your dashboard.

What properties should I add to the context?

You want to add any data that is relevant to your application and that you want to use to segment users. Good candidates are:

  • Country: You can use this to enable features for specific countries, or rollout a new feature country by country.
  • Device ID: Very useful on mobile apps to uniquely identify users that may not be logged into your app and don't have a user ID.
  • Session ID cookie: If you have a session ID cookie, you can use it to identify users that are not logged in.
  • App version: Extremely useful to target specific version of your mobile app, or to display updates-related messages to users that still have an old version of your app.
  • Plan: If your service offers different tiers of plans, you can use this to enable features for specific plans only.
  • Organization ID: If your service is used by organizations, you can use this to enable features for specific organizations, this way all users of that organization will have the same set of features enabled.

You are not limited in the number of properties you can add to the context, it is only a matter of business decisions.

How to add a property to the context?

Start by adding it to the Tggl app. Since context are project specific, first select the project you want to add the property to, then from the context menu hit New:

New context property 2x

From this modal you can create the property you want, here we created a version number for our Android app that will allow us to display a fullscreen message on deprecated app versions.

Create context property modal 2x

The name and type are used by Tggl to display the list of properties to pick from and the corresponding operator on the app. Because we selected the type version, we have the min version, max version, and exact version operators that we can choose from. If we had chosen a date type, we would have date operators available, and so on.

In app version 2x

The context key is used within the code of your app to pass the right value:

await client.setContext({
  version: '3.10.2',
  // Other context properties like userId, email...

How to edit a context property?

In Tggl, editing a context property allows you to modify its name, key, type, and description. To do so, simply click on the three dots “(...)” located at the right side of the context property you want to edit, then “Edit”.

A modal will appear, allowing you to modify the context property. When you’re done, simply click on the "Update" button to save the changes to the context property.

You can only edit the name and description for built-in properties.

How to delete a context property?

To delete a context property, simply click on the three dots “(...)” located at the right side of the context property you want to delete, then “Delete”.

You cannot delete built-in context properties. Moreover, if your context property is used by a flag, you will not be able to delete. You can either update this flag and delete this property then, or hide this property now to simplify setting up new flags.

How to hide a context property?

To delete a context property, simply click on the three dots “(...)” located at the right side of the context property you want to delete, then “Hide”.

Once you hide a context property it won’t appear neither on your context tab nor on your flag conditions.

How to search for a context property?

To search for a context property, you can either :

  • use the filter visibility (visible / hidden) and usage (used / not used)
  • use the search bar searching by name, key, type or description;
  • order the columns by clicking on the columns name


  • I can’t find my context in my flag conditions ⇒ It means someone made the context unusable by marking it as “hidden”.

  • I can’t find my context in the Context tab ⇒ The context is hidden: remove the filter “visibility” to unveil the hidden contexts

  • I removed the filter “visibility” but I still can’t find my context ⇒ Are you on the right project ? Contexts are not shared across projects. They need to be re-created separately. Try switching projects or recreating your context in this project if needed.