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How to implement feature flags utilizing LaunchDarkly
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README.md

Feature Flags Demo

This project provides a simple look at getting started using Feature Flags to control the visibility and access to new features in development. Simply clone the project or download and extract the .zip to get started.

Prerequisites

Node.js and NPM Angular CLI .Net Core Docker CE Note: Docker is only needed if you want to run solutions inside docker containers. The docker compose file is configured to map the local dist and bin directories, so there is no need to rebuild the containers during the development phase. LaunchDarkly Account

Angular App

In FeatureFlagsDemoApp directory,

  • Run npm install to restore node modules

  • Copy \app\envrionments\environment.sample.ts to \app\envrionments\environment.ts

  • Copy \app\envrionments\environment.sample.ts to \app\envrionments\environment.prod.ts

  • Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the -prod flag for a production build.

  • Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.

ASP.Net Core Web Api

In FeatureFlagsDemoApi directory,

  • Run dotnet build to restore packages and build solution

  • Run dotnet run to run dev server

  • Run dotnet watch run to run dev server in watch mode. The app will automatically build and reload if you change any of the source files

Docker

In FeatureFlagsDemoApp directory,

  • Run npm install to restore node modules

  • Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the -prod flag for a production build.

In root directory (FeatureFlagsDemo),

  • Run docker-compose build Note: On first run, this may take a while to complete as it is downloading the docker images for NGINX and ASP.Net Core

  • Run docker-compose up to build the docker containers.

  • Navigate to http://localhost:8080 for the Angular application.

  • Navigate to http://localhost:5000/api/lego/ninjas for the Web API.

LaunchDarkly

LaunchDarkly provides a free 30-day trial.

  • Login to LaunchDarkly

  • Navigate to "Account settings"

  • Copy the "Client-side ID" and replace <YOUR_KEY_HERE> in "environment.ts" and "environment.prod.ts" files

  • Navigate to "Feature Flags"

  • Add a new flag named Lego Ninjago Search and key ln-search

  • Add a new flag named Lego Ninjago API and key ln-api

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