OpenTelemetry Core

[![NPM Published Version][npm-img]][npm-url]

[![Apache License][license-image]][license-image]

This package provides default implementations of the OpenTelemetry API for trace and metrics. It's intended for use both on the server and in the browser.

Built-in Implementations

• OpenTelemetry Core

- Built-in Implementations

- Built-in Propagators

- W3CTraceContextPropagator Propagator

- Composite Propagator

- Baggage Propagator

- Useful links

- License

Built-in Propagators

#### W3CTraceContextPropagator Propagator

OpenTelemetry provides a text-based approach to propagate context to remote services using the W3C Trace Context HTTP headers.

```js

const api = require("@opentelemetry/api");

const { W3CTraceContextPropagator } = require("@opentelemetry/core");

/* Set Global Propagator */

api.propagation.setGlobalPropagator(new W3CTraceContextPropagator());

```

#### Composite Propagator

Combines multiple propagators into a single propagator.

This is used as a default Propagator

```js

const api = require("@opentelemetry/api");

const { CompositePropagator } = require("@opentelemetry/core");

/* Set Global Propagator */

api.propagation.setGlobalPropagator(new CompositePropagator());

```

#### Baggage Propagator

Provides a text-based approach to propagate baggage to remote services using the OpenTelemetry Baggage Propagation HTTP headers.

```js

const api = require("@opentelemetry/api");

const { W3CBaggagePropagator } = require("@opentelemetry/core");

/* Set Global Propagator */

api.propagation.setGlobalPropagator(new W3CBaggagePropagator());

```

Useful links

• For more information on OpenTelemetry, visit: <https://opentelemetry.io/>
• For more about OpenTelemetry JavaScript: <https://github.com/open-telemetry/opentelemetry-js>
• For help or feedback on this project, join us in [GitHub Discussions][discussions-url]

License

Apache 2.0 - See [LICENSE][license-url] for more information.

[discussions-url]: https://github.com/open-telemetry/opentelemetry-js/discussions

[license-url]: https://github.com/open-telemetry/opentelemetry-js/blob/main/LICENSE

[license-image]: https://img.shields.io/badge/license-Apache_2.0-green.svg?style=flat

[npm-url]: https://www.npmjs.com/package/@opentelemetry/core

[npm-img]: https://badge.fury.io/js/%40opentelemetry%2Fcore.svg