blog[js]: Add post announcing JS SDK 2.0

Author: JamieDanielson

content/en/blog/2025/otel-js-sdk-2-0.md

@@ -0,0 +1,56 @@
+---
+title: Announcing the OpenTelemetry JavaScript SDK 2.0
+linkTitle: OTel JS SDK 2.0
+date: 2025-02-21
+author: >
+  [Jamie Danielson](https://github.com/JamieDanielson) (Honeycomb)
+sig: OpenTelemetry JS
+---
+
+Exciting news! [OpenTelemetry JavaScript](https://github.com/open-telemetry/opentelemetry-js) has released [SDK 2.0](https://github.com/open-telemetry/opentelemetry-js/releases)!
+
+There is a [migration guide](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md) in the repo detailing breaking changes and steps for users to take to upgrade to the latest versions.
+
+## What is JS SDK 2.x?
+
+"JS SDK 2.x" encompasses new releases of the `@opentelemetry/*` JavaScript packages published from the [`opentelemetry-js` repository](https://github.com/open-telemetry/opentelemetry-js), except the API and semantic-conventions packages. The package versions for this new major will be `>=2.0.0` for the stable and `>=0.200.0` for the unstable packages. Details on the full list of packages can be found in the [migration guide](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#what-is-js-sdk-2x).
+
+## What has changed?
+
+### Summary
+
+- The **minimum supported Node.js has been raised to `^18.19.0 || >=20.6.0`**. This means that support for Node.js 14 and 16 has been dropped.
+- The **minimum supported TypeScript version has been raised to 5.0.4**.
+- The **compilation target for transpiled TypeScript has been raised to ES2022** (from ES2017).
+- The **public interface has changed**
+  - for notes on migrating to 2.x / 0.200.x see [the upgrade guide](https://github.com/open-telemetry/opentelemetry-js/tree/main/doc/upgrade-to-2.x.md)
+
+### Details
+
+- [Node.js supported versions](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-nodejs-supported-versions)
+- [TypeScript supported versions](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-typescript-supported-versions)
+- [ES2022 compilation target](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-es2022-compilation-target)
+- [Drop `window.OTEL_*` support in browsers](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-drop-windowotel_-support-in-browsers)
+- [`@opentelemetry/resources` API changes](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-opentelemetryresources-api-changes)
+- [`@opentelemetry/core` API changes](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-opentelemetrycore-api-changes)
+- [Tracing SDK API changes](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-tracing-sdk-api-changes)
+- [`@opentelemetry/sdk-metrics` API changes](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-opentelemetrysdk-metrics-api-changes)
+- [`@opentelemetry/resources` changes for *implementors* of Resource Detectors](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-opentelemetryresources-changes-for-implementors-of-resource-detectors)
+- [Other changes](https://github.com/open-telemetry/opentelemetry-js/blob/main/doc/upgrade-to-2.x.md#-other-changes)
+
+## Why was this done?
+
+Some of the details for why this 2.0 was done can be found [in this issue](https://github.com/open-telemetry/opentelemetry-js/issues/4083). We knew we would gain the greatest benefit by allowing breaking changes to improve things related to:
+
+- Optimization: removing classes and namespaces to allow better minification and tree-shaking.
+- Better Tooling and Support: dropping old runtimes and tool versions to take advantage of enhanced ESM support and simplify documentation.
+- Velocity: reducing code complexity and removing deprecated fields for faster feature and maintenance work.
+
+This also begins our goal of releasing a new major release every year.
+
+## How can I get involved?
+
+- Try out the [v2.0.0](https://github.com/open-telemetry/opentelemetry-js/releases/tag/v2.0.0) and [v0.200.0](https://github.com/open-telemetry/opentelemetry-js/releases/tag/experimental%2Fv0.200.0) releases and provide feedback
+- Review our [contributing guide](https://github.com/open-telemetry/opentelemetry-js/blob/main/CONTRIBUTING.md) for details on contributing
+- Attend our [SIG meetings](https://groups.google.com/a/opentelemetry.io/g/calendar-js)
+- Collaborate on [Slack](https://cloud-native.slack.com/archives/C01NL1GRPQR)