Question

Can you provide an example of creating a Lambda function using Node.js?

Answer 1

Certainly! Below is an example of a simple Lambda function written in Node.js that logs a message:

// Example Node.js Lambda function
exports.handler = async (event) => {
    console.log('Hello from Lambda!');
    const response = {
        statusCode: 200,
        body: JSON.stringify('Hello from Lambda!'),
    };
    return response;
}; 

Explanation:

• exports.handler: This is the entry point for the Lambda function.
• async (event) => { ... }: This is an asynchronous function that AWS Lambda invokes with an event parameter containing the event data.
• console.log('Hello from Lambda!');: Logs a message to the AWS CloudWatch logs.
• const response = { ... }: Defines a basic HTTP response with a status code and body.
• return response;: Returns the response back to the caller.