AWS Lambda - Getting path parameters using Node.js

Short answer:

const { id } = event.pathParameters;

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Serverless Architecture: AWS API Gateway & Lambda

I'm assuming you are using lambda proxy here i'm pasting the event object sample for lambda proxy.

    {
  "message": "Good day, John of Seattle. Happy Friday!",
  "input": {
    "resource": "/{proxy+}",
    "path": "/Seattle",
    "httpMethod": "POST",
    "headers": {
      "day": "Friday"
    },
    "queryStringParameters": {
      "time": "morning"
    },
    "pathParameters": {
      "proxy": "Seattle"
    },
    "stageVariables": null,
    "requestContext": {
      "path": "/{proxy+}",
      "accountId": "123456789012",
      "resourceId": "nl9h80",
      "stage": "test-invoke-stage",
      "requestId": "test-invoke-request",
      "identity": {
        "cognitoIdentityPoolId": null,
        "accountId": "123456789012",
        "cognitoIdentityId": null,
        "caller": "AIDXXX...XXVJZG",
        "apiKey": "test-invoke-api-key",
        "sourceIp": "test-invoke-source-ip",
        "accessKey": "ASIXXX...XXDQ5A",
        "cognitoAuthenticationType": null,
        "cognitoAuthenticationProvider": null,
        "userArn": "arn:aws:iam::123456789012:user/kdeding",
        "userAgent": "Apache-HttpClient/4.5.x (Java/1.8.0_131)",
        "user": "AIDXXX...XXVJZG"
      },
      "resourcePath": "/{proxy+}",
      "httpMethod": "POST",
      "apiId": "r275xc9bmd"
    },
    "body": "{ \"callerName\": \"John\" }",
    "isBase64Encoded": false
  }
}

the path can be extracted from "path" key in event object, it can be accessed from event.path and after that you can use string manipulation function to further manipulate it.

I hope it helps !