API Reference (Svelte)

createAbby

Parameters

The createAbby function takes an object as a parameter. The object can contain the following properties:

Name	Type	Required	Description	details
projectId	`string`	✅	The ID of your project in Abby	-
apiUrl	`string`		The URL of the Abby API. Defaults to the hosted version	-
currentEnvironment	`string`	✅	The current environment of your application	link
tests	`object`		An object containing your defined A/B Tests	-
flags	`Array<string>`		An array containing your defined Feature Flags	-
settings	`object`		An object with additional settings for A/BBY	-

tests

The tests property is an object containing your defined A/B Tests. You probably want to use the Copy Button in your dashboard to copy the tests object. They keys of the object represent the names of your predefined A/B tests. The values are objects containing the following properties:

Name	Type	Required	Description
variants	`Array<string>`	✅	An array of strings containing the variants of the test

Example

const abby = createAbby({
  // ... your config
  tests: {
    "test-abtest": {
      variants: ["control", "variant-a", "variant-b"],
    },
  },
});

flags

The flags property is an array containing your defined Feature Flags. You probably want to use the Copy Button in your dashboard to copy the flags array.

Example

const abby = createAbby({
  // ... your config
  flags: { "test-flag": "Boolean" },
});

settings

The settings property is an object containing additional settings for A/BBY. The following properties are available:

flags.devDefault: A boolean to set the default value of all feature flags in development mode. Defaults to true.
flags.default: A boolean to set the default value of all feature flags in production mode. Defaults to false.
flags.devOverrides: An object containing the values of feature flags in development mode. The keys of the object represent the names of the flags. The values are booleans.

Return Values

useAbby

useAbby is a function providing acces to a store that is used to access the value of an A/B Test. Recurring users will always get the same value for a test. New users will get a random value for a test depending on the defined weights

Parameters

string: The name of the test or flag, needs to be one of the defined tests.

Return Values

variant : Store providing the variant of the test
onAct: A function to call when the user performs an action associated with the test Type: function

useFeatureFlag

useFeatureFlag is a function providing acces to a store that is used to access the value of a Feature Flag.

Parameters

The name of the test or flag, needs to be one of the defined flags.

Return Value

A store providing the value of the flag Type: boolean

AbbyProvider

A svelte component to wrap your application.

Props

children: The children of the component
initialData (optional): The data (weights, tests, etc). If not provided, the data will be fetched on the client.

getFeatureFlagValue

getFeatureFlagValue is a function to access the value of a feature flag. This can be called in a non-svelte scope (Regular Typescript, Edge Functions and API Routes)

Parameters

The name of the test or flag, needs to be one of the defined flags.

getABTestValue

getABTestValue is a function to access the users variant of an A/B Test. This can be called in a non-svelte scope. If the user is new, a random variant will be generated based on the weights, persisted in a cookie and returned. Otherwise the variant will be read from the cookie and returned.

Parameters

The name of the test, needs to be one of the defined tests.

Return Values

The variant of the test.

abby

__abby__ is the Abby instance. It can be used to access the data of the current user. In most cases you will not need to use this.

withDevtools

withDevtools is a function providing a svelte component to enable the Devtools. The Devtools need to be within the 'AbbyProvider'.

Parameters

The Devtools component from @tryabby/devtools

Example

import { AbbyDevTools } from "@tryabby/devtools";
export const AbbyDevtools = withDevtools(AbbyDevTools);

withAbby

A function that enables Server Side Rendering within Sveltekit If you use this in your layout.server.ts, all occurances of useFeatureFlag will be SSR'd.

Example

// layout.server.ts
import { abby } from "$lib/abby";
 
export const load = abby.withAbby();

getABResetFunction

This is a function which returns a function that can be used to reset the stored variant for the current user. This means the cookie will be deleted and the user will get a new variant on the next page load.

Parameters

The name of the test, needs to be one of the defined tests.

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