How AWS Amplify Manages Triggers for AWS Lambda Functions

3 min readFeb 15
Photo by Mehmet Ali Peker on Unsplash


AWS Amplify is a development platform that provides a set of tools and services for building cloud-powered mobile and web applications. Among the many services provided by AWS Amplify is the ability to create and deploy AWS Lambda functions, which can be used to perform a variety of tasks and backend operations.

When creating a Lambda function using AWS Amplify, one of the key considerations is how the function will be triggered. Triggering a Lambda function is the process of invoking the function in response to an event, such as a file being uploaded to an S3 bucket or an API Gateway request being received. In this article, we’ll discuss how AWS Amplify manages triggers for Lambda functions and how you can use this functionality to build more powerful and efficient serverless applications.


Before we dive into how AWS Amplify manages triggers for Lambda functions, it’s helpful to have some background on how Lambda functions are typically triggered. When creating a Lambda function using the AWS Management Console or AWS CLI, you must explicitly configure one or more event sources that will trigger the function when certain events occur. These event sources can include S3 buckets, DynamoDB streams, API Gateway requests, and many others.

While this approach works well for many use cases, it can be cumbersome and time-consuming to manage multiple event sources and configure them to work with your Lambda functions. AWS Amplify simplifies this process by managing triggers for you, allowing you to focus on writing code and building your application.

AWS Amplify Triggers

When creating a Lambda function using AWS Amplify, you have the option to define one or more triggers that will automatically invoke the function in response to specific events. These triggers can include authentication events, database events, and many others, and can be managed using the AWS Amplify CLI or the AWS Amplify console.

For example, if you’re building a web application that allows users to upload photos, you might want to create a trigger that automatically resizes and compresses the photos when they’re uploaded to an S3…


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