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--- title: Feature Management Overview titleSuffix: Azure App Configuration description: Overview of feature management libraries of different programming languages. services: azure-app-configuration author: zhiyuanliang-ms ms.author: zhiyuanliang ms.service: azure-app-configuration ms.topic: overview ms.date: 02/04/2026 #Customer intent: I want to learn about the feature management libraries of different languages, specifically to track their feature development status. ms.custom: - build-2025 --- # Feature Management Overview Feature Management libraries provide standardized APIs for enabling feature flags within applications. Use these libraries to secure a consistent experience when developing applications that use patterns such as beta access, rollout, dark deployments, and more. ## Feature Management Libraries Module | Platform | Sample | Release Notes ------ | -------- | ------ | ------------- [Microsoft.FeatureManagement](https://github.com/microsoft/FeatureManagement-Dotnet)<br/>[](https://www.nuget.org/packages/Microsoft.FeatureManagement)| .NET Standard | [Sample](https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/examples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/Microsoft.Featuremanagement.md) [Microsoft.FeatureManagement.AspNetCore](https://github.com/microsoft/FeatureManagement-Dotnet)<br/>[](https://www.nuget.org/packages/Microsoft.FeatureManagement.AspNetCore) | ASP&#46;NET Core | [Sample](https://github.com/microsoft/FeatureManagement-Dotnet/tree/main/examples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/Microsoft.Featuremanagement.md) [spring-cloud-azure-feature-management](https://github.com/Azure/azure-sdk-for-java/tree/main/sdk/spring/spring-cloud-azure-feature-management)<br/>[](https://search.maven.org/artifact/com.azure.spring/spring-cloud-azure-feature-management) | Spring Boot | [Sample](https://github.com/Azure-Samples/azure-spring-boot-samples/tree/main/appconfiguration/spring-cloud-azure-feature-management/spring-cloud-azure-feature-management-sample) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/SpringCloudAzureFeatureManagement.md) [spring-cloud-azure-feature-management-web](https://github.com/Azure/azure-sdk-for-java/tree/main/sdk/spring/spring-cloud-azure-feature-management-web)<br/>[](https://search.maven.org/artifact/com.azure.spring/spring-cloud-azure-feature-management-web) | Spring Boot | [Sample](https://github.com/Azure-Samples/azure-spring-boot-samples/tree/main/appconfiguration/spring-cloud-azure-feature-management-web/spring-cloud-azure-feature-management-web-sample) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/SpringCloudAzureFeatureManagement.md) [featuremanagement](https://github.com/microsoft/FeatureManagement-Python)<br/>[](https://pypi.org/project/FeatureManagement/) | Python | [Sample](https://github.com/microsoft/FeatureManagement-Python/tree/main/samples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/PythonFeatureManagement.md) [@microsoft/feature-management](https://github.com/microsoft/FeatureManagement-JavaScript)<br/>[](https://www.npmjs.com/package/@microsoft/feature-management) | JavaScript | [Sample](https://github.com/microsoft/FeatureManagement-JavaScript/tree/main/examples) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/JavaScriptFeatureManagement.md) [featuremanagement](https://github.com/microsoft/FeatureManagement-Go)<br/><a href="https://pkg.go.dev/github.com/microsoft/Featuremanagement-Go/featuremanagement"><img src="media/feature-management-overview/go-provider.png" alt="Go" width="90" height="20"></a> | Go | [Sample](https://github.com/microsoft/FeatureManagement-Go/tree/main/example) | [Release Notes](https://github.com/Azure/AppConfiguration/blob/main/releaseNotes/GoFeatureManagement.md) ## Feature Development Status This is an overview of each feature and its current status for different frameworks or programming languages. - **GA (General Availability)**: The feature is fully released, considered stable, and ready for production use. - **Preview**: The feature is available for early testing and feedback, but not yet fully stable or recommended for production use. - **WIP (Work in Progress)**: The feature is actively being developed and not yet ready for release. - **N/A (Not Available)**: It is not planned to offer the feature for the specified framework or language. Feature | .NET | Spring | Python | JavaScript | Go | ------- | ---- | ------ | ------ | ---------- | -- | Targeting Filter | [GA](./feature-management-dotnet-reference.md#targeting) | [GA](/azure/developer/java/spring-framework/#targeting) | [GA](./feature-management-python-reference.md#targeting) | [GA](./feature-management-javascript-reference.md#targeting) | [GA](./feature-management-go-reference.md#targeting) Targeting Exclusion | [GA](./feature-management-dotnet-reference.md#targeting-exclusion) | GA | [GA](./feature-management-python-reference.md#targeting-exclusion) | [GA](./feature-management-javascript-reference.md#targeting-exclusion) | [GA](./feature-management-go-reference.md#targeting-exclusion) Ambient Targeting | [GA](./feature-management-dotnet-reference.md#targeting-in-a-web-application) | WIP | [GA](./feature-management-python-reference.md#targeting-context-accessor) | [GA](./feature-management-javascript-reference.md#targeting-in-a-web-application) | WIP Time Window Filter | [GA](./feature-management-dotnet-reference.md#microsofttimewindow) | [GA](/azure/developer/java/spring-framework/#timewindowfilter) | [GA](./feature-management-python-reference.md#microsofttimewindow) | [GA](./feature-management-javascript-reference.md#microsofttimewindow) | [GA](./feature-management-go-reference.md#microsofttimewindow) Recurring Time Window | [GA](./feature-management-dotnet-reference.md#microsofttimewindow) | [GA](/azure/developer/java/spring-framework/#timewindowfilter) | [GA](./feature-management-python-reference.md#microsofttimewindow) | [GA](./feature-management-javascript-reference.md#microsofttimewindow) | WIP Custom Feature Filter | [GA](./feature-management-dotnet-reference.md#implement-a-feature-filter) | [GA](/azure/developer/java/spring-framework/#custom-feature-filters) | [GA](./feature-management-python-reference.md#implementing-a-feature-filter) | [GA](./feature-management-javascript-reference.md#implementing-a-feature-filter) | [GA](./feature-management-go-reference.md#implementing-a-feature-filter) Feature Filter Requirement Type (AND/OR) | [GA](./feature-management-dotnet-reference.md#requirement-type) | GA | [GA](./feature-management-python-reference.md#requirement-type) | [GA](./feature-management-javascript-reference.md#requirement-type) | [GA](./feature-management-go-reference.md#requirement-type) Variant Feature Flag | [GA](./feature-management-dotnet-reference.md#variants) | GA | [GA](./feature-management-python-reference.md#variants) | [GA](./feature-management-javascript-reference.md#variants) | [GA](./feature-management-go-reference.md#variants) Feature Flag Telemetry | [GA](./feature-management-dotnet-reference.md#telemetry) | GA | [GA](./feature-management-python-reference.md#telemetry) | [GA](./feature-management-javascript-reference.md#telemetry) | WIP Application Insights Integration | [GA](./feature-management-dotnet-reference.md#application-insights-telemetry) | GA | [GA](./feature-management-python-reference.md#application-insights-telemetry) | [GA](./feature-management-javascript-reference.md#application-insights-integration) | WIP Feature Gate | [GA](./feature-management-dotnet-reference.md#controllers-and-actions) | [GA](/azure/developer/java/spring-framework/#feature-gate) | N/A | N/A | N/A Feature Gated Middleware | [GA](./feature-management-dotnet-reference.md#application-building) | [GA](/azure/developer/java/spring-framework/#disabled-action-handling) | N/A | N/A | N/A Custom Feature Flag Configuration Merging | [GA](./feature-management-dotnet-reference.md#handling-multiple-configuration-sources) | N/A | N/A | N/A | N/A ## Support policy Details on the support policy for feature management libraries can be found [here](./client-library-support-policy.md).