Install the library in your project:

The Logger utility must always be instantiated outside the Lambda handler. By doing this, subsequent invocations processed by the same instance of your function can reuse these resources. This saves cost by reducing function run time. In addition, Logger can keep track of a cold start and inject the appropriate fields into logs.

npm install @aws-lambda-powertools/logger
                                                      

The Logger utility must always be instantiated outside the Lambda handler. By doing this, subsequent invocations processed by the same instance of your function can reuse these resources. This saves cost by reducing function run time. In addition, Logger can keep track of a cold start and inject the appropriate fields into logs.

import { Logger, injectLambdaContext } from '@aws-lambda-powertools/logger';
import middy from '@middy/core';

const logger = new Logger({
  logLevel: 'INFO',
  serviceName: 'shopping-cart-api',
});

const lambdaHandler = async (): Promise<void> => {
  logger.info('This is an INFO log with some context');
};

export const handler = middy(lambdaHandler).use(injectLambdaContext(logger));