osls/docs/cli-reference/deploy-function.md

Open-source alternative to Serverless Framework

# AWS - Deploy Function

The `sls deploy function` command deploys an individual function without AWS CloudFormation. This command simply swaps out the zip file that your CloudFormation stack is pointing toward. This is a much faster way of deploying changes in code.

```bash
serverless deploy function -f functionName
```

**Note:** This command **now** deploys both function configuration and code by
default. Just as before, this puts your function in an inconsistent state that
is out of sync with your CloudFormation stack. Use this for faster development
cycles and not production deployments

## Options

- `--function` or `-f` The name of the function which should be deployed
- `--stage` or `-s` The stage in your service that you want to deploy to.
- `--region` or `-r` The region in that stage that you want to deploy to.
- `--update-config` or `-u` Pushes ONLY Lambda-level configuration changes e.g. handler, timeout or memorySize

## Examples

### Deployment without stage and region options

```bash
serverless deploy function --function helloWorld
```

### Deployment with stage and region options

```bash
serverless deploy function --function helloWorld \
  --stage dev \
  --region us-east-1
```

### Deploy only configuration changes

```bash
serverless deploy function --function helloWorld --update-config
```