Feature Toggles Lib

Library for creating Feature Toggles, and checking if they have been enabled/disabled by the Feature Toggles App. A feature toggle is is a boolean flag that can be used in your application to enable/disable functionality.

Common usages of feature toggles are:

• Merging partially implemented features into your codebase, but not exposing them to the end users
• A feature switch (kill switch?) that can be used by the admins/editors
• Enable a feature on the "draft" branch, but not on "master".

[!TIP] We recommend that you use the Feature Toggle App to toggle feature flags instead of using this library to do it programmatically.

Installation

To install this library you need to add a new dependency to your app's build.gradle file.

Gradle

repositories {
  maven { url "https://repo.itemtest.no/releases" }
}

dependencies {
  include "no.item:lib-xp-feature-toggles:1.0.0"
}

TypeScript

Install the TypeScript-types with the following command:

npm install --save-dev @item-enonic-types/lib-features-toggles

By adding the following changes to your tsconfig.json you will get TypeScript-support for this library.

{
  "compilerOptions": {
    "paths": {
+     "/lib/feature-toggles": ["../../../node_modules/@item-enonic-types/lib-feature-toggles"],
    }
  }
}

Usage

isEnabled()

Checks if the feature is enabled for the current space. Where the space by default is your apps name. You can also name your own spaces if you want to configure it per site.

isEnabled will automatically create the space and the feature with a default value if it's called in a draft context.

import { isEnabled } from "/lib/feature-toggles";

const isMyFeatureEnabled1: boolean = isEnabled({
  featureKey: "my-feature",
  defaultValue: false,
  spaceKey: app.name,
});

// This shorthand will yield the the same result as the example above
const isMyFeatureEnabled2: boolean = isEnabled("my-feature");

create()

Creates spaces and features for your app. This should usually be run from your main.js file, to initialize spaces and features you're going use. Spaces and features will automatically be created by the isEnabled() function, but if you're using the companion app for this library, they won't show up there until someone hits that part of your code.

This will only create the spaces and features for "draft" contexts, and not "master", you'll have to use the companion app or publishFeature() for that.

This will not update features that already exists, for that you'll have to use update().

import { create } from "/lib/feature-toggles";

// Create a single new feature flag in the default space (`app.name`)
create({
  name: "my-feature",
  enabled: true,
});

// Create multiple new feature flags in the default space (`app.name`)
create([
  {
    name: "my-feature",
    enabled: false,
  },
  {
    name: "my-second-feature",
    enabled: true,
  },
]);

// Create feature flags in a different "space"
const siteBasedSpaceKey = getSite()._name;

create(
  [
    {
      name: "my-feature",
      enabled: false,
      spaceKey: siteBasedSpaceKey,
    },
    {
      name: "my-second-feature",
      enabled: true,
      spaceKey: siteBasedSpaceKey,
    },
  ],
);

update()

Enable/Disable a feature in draft

import { update } from "/lib/feature-toggles";

// Enable the feature "my-feature" in the default space (`app.name`)
update({
  name: "my-feature",
  enabled: true
});

// Disable the feature "my-feature" in a space based on the current site
const siteBasedSpaceKey = getSite()._name;

update(
  {
    name: "my-feature",
    enabled: false,
    spaceKey: siteBasedSpaceKey,
  },
);

publish()

Publishes feature from "draft" to "master".

import { publish } from "/lib/feature-toggles";

// Publish a feature with a given `id` to go live on your site
publish("9800b7a6-ebe6-4332-ac24-c70cd7ecf596");

// Publish a feature in the default space to go live
publish({
  featureKey: "my-feature",
  spaceKey: app.name,
})

// Publish to a different space then `app.name`
const siteBasedSpaceKey = getSite()._name;

publish({
  featureKey: "my-feature",
  spaceKey: siteBasedSpaceKey
})

Deploying

Building

To build the project run the following code

./gradlew build

Deploy locally

Deploy locally for testing purposes:

./gradlew publishToMavenLocal

Deploy to Maven

./gradlew publish -P com.enonic.xp.app.production=true