When creating a lambda rest API using CDK, by default it creates a stage named prod

import * as cdk from "aws-cdk-lib";
import * as apigw from "aws-cdk-lib/aws-apigateway";

export class ApiGatewayDemo extends cdk.Stack {
  constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    // API Gateway REST API
    const api = new apigw.LambdaRestApi(this, "Endpoint", {
      proxy: false,
    });
  }

API URL looks like `https://api-id.execute-api.region.amazonaws.com/prod/`

Creating an API with the stage name dev

To set the stage name in AWS Lambda REST API using CDK, use the stageName property.

import * as cdk from "aws-cdk-lib";
import * as apigw from "aws-cdk-lib/aws-apigateway";

export class ApiGatewayDemo extends cdk.Stack {
  constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    // API Gateway REST API
    const api = new apigw.LambdaRestApi(this, "Endpoint", {
      proxy: false,
      deployOptions: {
        stageName: "dev",
      },
    });
  }
}

Now API URL will look like `https://api-id.execute-api.region.amazonaws.com/dev/`

The above code defines a class called ApiGatewayDemo which extends the Stack class from the aws-cdk-lib library. The Stack class represents a cloud resource stack in the AWS CloudFormation service.

The ApiGatewayDemo class has a single constructor function, which takes three arguments:

• scope: an instance of the App class from the aws-cdk-lib library. The App class represents a CDK app, which is a collection of stacks and assets that can be deployed together.

• id: a string that uniquely identifies the stack within the CDK app.

• props: optional properties for the stack.

Inside the constructor function, the code first calls the super function to call the base Stack class's constructor function with the scope, id, and props arguments. This creates an instance of the Stack class.

Next, the code creates an instance of the LambdaRestApi class from the aws-apigateway library. This class represents an AWS Lambda REST API in a CDK app. The LambdaRestApi class takes two arguments:

• this: the current ApiGatewayDemo instance, which is passed as the first argument to all methods in the class.

• "Endpoint": a string that is used as the identifier for the REST API.

The LambdaRestApi class has a single property, proxy, which is set to false in this example. This means that the REST API will not act as a proxy for another resource or service.

The LambdaRestApi class also has a deployOptions property, which is an object with a stageName property. The stageName property is set to "dev" in this example.

This sets the stage name of the REST API to "dev". The stage name is used to identify a specific deployment of the API, and it is used as a suffix in the URL of the API (e.g. https://api-id.execute-api.region.amazonaws.com/dev).

We can have multiple stages of the same API, each with its own stage name and separate URL