# OpenReplay Tracker The main package of the [OpenReplay](https://openreplay.com/) tracker. ## Development & Contribution Please use [bun](https://bun.sh/) to install and build this library. Any submitted pull request must pass **all tests** and should have positive test coverage diff %. ## Documentation For launch options and available public methods, [refer to the documentation](https://docs.openreplay.com/en/sdk/methods) ## Installation ```bash npm i @openreplay/tracker ``` ## Usage Initialize the package from your codebase entry point and start the tracker. You must set the `projectKey` option in the constructor. Its value can can be found in your OpenReplay dashboard under [Preferences -> Projects](https://app.openreplay.com/client/projects). ```js import Tracker from '@openreplay/tracker' const tracker = new Tracker({ projectKey: YOUR_PROJECT_KEY, }) tracker .start({ userID: 'Mr.Smith', metadata: { version: '3.5.0', balance: '10M', role: 'admin', }, }) .then((startedSession) => { if (startedSession.success) { console.log(startedSession) } }) ``` Then you can use OpenReplay JavaScript API anywhere in your code. ```js tracker.setUserID('my_user_id') tracker.setMetadata('env', 'prod') ```