Functions overview

AWS's serverless Lambda functions open a world of possibilities for running on-demand, server-side code without having to run a dedicated server. However, managing service discovery, configuring API gateways, and coordinating deployments between your app and your serverless functions can quickly become overwhelming.

Netlify lets you deploy serverless Lambda functions without an AWS account, and with function management handled directly within Netlify. Your serverless functions are version-controlled, built, and deployed along with the rest of your Netlify site, and we will automatically handle service discovery through our built-in API gateway. This eliminates overhead and brings the power of Deploy Previews and rollbacks to your serverless functions.

Currently, you can deploy serverless functions built with JavaScript and Go.

Manage your serverless functions

Serverless Lambda functions deployed via Netlify are immutable. This means that an update to a function on your production branch won’t change the version that was deployed in a branch deploy, or in a Deploy Preview. You can access all versions of your serverless functions in the Netlify web interface, under the Functions tab.

By default, the list displays the serverless functions in the current production deploy. To find functions on another deploy, you can use the dropdown at the top of the list. You can start typing to jump to a particular branch, or find a Deploy Preview by number.

Default deployment options

By default, all serverless functions are deployed with:

  • us-east-1 AWS Lambda region
  • 1024MB of memory
  • 10 second execution limit

Custom deployment options

If you want to deploy your serverless functions on different AWS regions, tweak memory or execution time limits, or deploy serverless functions onto your own AWS account (in order to integrate with other AWS services on your account), please contact sales.

Functions: Configuring the functions folder

JavaScript Lambda functions

JavaScript functions: The handler method

Functions: JavaScript Runtime Settings

Tools for building JavaScript functions

Functions: Netlify Lambda CLI

Create React App Lambda

Go Lambda Functions

Go functions: The handler method

Go functions: Accessing the ClientContext

Building Go functions with Netlify's Continuous Deployment

Event-triggered functions

Event function payloads

Event functions signature

Identity and Functions

Functions: Identity and clientContext

Identity event functions

Function logs

Functions: Usage and Billing

Functions: Changing levels