Overview

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Welcome to LaunchDarkly docs

Learn how to use LaunchDarkly to release faster, break nothing, and build products customers love.

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Build a strong foundation with release management

Streamline releases and ship with confidence thanks to LaunchDarkly’s best practices, governance features, and built-in automation

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What’s new

DateChange summaryAffected topics
February 5, 2026Updates the list of filters that are no longer available in the feature flags REST API.REST API migration guide: 20220603 to 20240415
February 4, 2026Updates the data saving mode EAP topic with information about using the Java (server-side) SDK version 7.11.Data saving mode
February 4, 2026Removes the deprecated forceNew option from LDRecord.start() code examples in session replay documentation.JavaScript SDK observability reference, React Web SDK observability reference, Vue SDK observability reference, Configuration for session replay, Detecting user frustration with session replay
February 4, 2026Publishes a migration guide for the JavaScript SDK 4.0 release.JavaScript SDK 3.x to 4.0 migration guide
February 4, 2026Updates the JavaScript reference and several feature topics for the JavaScript SDK 4.0 release.JavaScript SDK reference, Requirements and polyfills, Getting all flags, Application metadata configuration, Configuration, Service endpoint configuration, Evaluating flags, Flag evaluation reasons, Sending custom events, Monitoring SDK status, Secure mode
February 4, 2026Updates experiment creation procedures and Experimentation guides to be type-agnostic.Experiment metric types, Creating experiments
See all updates

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Use client-side, server-side, or edge SDKs to evaluate flags. Use AI SDKs to customize AI Configs.

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Additional resources

Learn how to use LaunchDarkly with these other useful resources.