🤖 Claude Code: Update all examples to modern runtime and ESM

_instructor/core-concepts/1-http-hello-world/README.md

@@ -5,6 +5,7 @@ This lesson will walk through creating a basic function triggered by a http GET
 <!-- AUTO-GENERATED-CONTENT:START (TOC) -->
 - [Lesson Steps](#lesson-steps)
 - [Complete code](#complete-code)
+- [Additional Resources](#additional-resources)
 <!-- AUTO-GENERATED-CONTENT:END -->
 
 ## Lesson Steps

_instructor/core-concepts/1-http-hello-world/handler.js

@@ -1,5 +1,5 @@
 
-module.exports.hello = (event, context, callback) => {
+export const hello = (event, context) => {
   // WORKSHOP_START
   /* Step 1. In this_file, Create a `200` response code and return the `event` data in the response body.
 
@@ -8,7 +8,7 @@ module.exports.hello = (event, context, callback) => {
     For more details, see the http event docs link http://bit.ly/2mkgV4P
   */
   const response = {}
-  return callback(null, response);
+  return response;
   // WORKSHOP_END
   // FINAL_START
   const response = {
@@ -19,7 +19,6 @@ module.exports.hello = (event, context, callback) => {
       event: event,
     }),
   }
-  /** callback(error, response) */
-  return callback(null, response)
+  return response
   // FINAL_END
 }

_instructor/core-concepts/1-http-hello-world/serverless.yml

@@ -3,7 +3,7 @@ service: my-first-service
 
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
 
 functions:
   hello:

_instructor/core-concepts/2-http-dynamic-content/handler.js

@@ -6,15 +6,15 @@
 
     Finally remember to set the headers of the response as `'Content-Type': 'text/html'` to return HTML instead of the default `json`
  */
-module.exports.queryParamsExample = (event, context, callback) => {
+export const queryParamsExample = (event, context) => {
   // WORKSHOP_START
   const response = {
     statusCode: 200,
     body: JSON.stringify({
       message: 'Hi ⊂◉‿◉つ',
     }),
   }
-  return callback(null, response)
+  return response
   // WORKSHOP_END
   // FINAL_START
   let name
@@ -24,13 +24,13 @@ module.exports.queryParamsExample = (event, context, callback) => {
   /* generate the hello paragraph */
   const helloParagraph = greetPerson(name)
 
-  return callback(null, {
+  return {
     statusCode: 200,
     headers: {
       'Content-Type': 'text/html',
     },
     body: generateHtmlPage(helloParagraph),
-  })
+  }
   // FINAL_END
 }
 
@@ -42,15 +42,15 @@ module.exports.queryParamsExample = (event, context, callback) => {
 
     Finally, remember to set the headers of the response as `'Content-Type': 'text/html'` to return HTML instead of the default `json`
  */
-module.exports.pathParamsExample = (event, context, callback) => {
+export const pathParamsExample = (event, context) => {
   // WORKSHOP_START
   const response = {
     statusCode: 200,
     body: JSON.stringify({
       message: 'Hi ⊂◉‿◉つ',
     }),
   }
-  return callback(null, response)
+  return response
   // WORKSHOP_END
   // FINAL_START
   let name
@@ -61,14 +61,14 @@ module.exports.pathParamsExample = (event, context, callback) => {
   /* generate the hello paragraph */
   const helloParagraph = greetPerson(name)
 
-  // callback is sending HTML back
-  return callback(null, {
+  // return is sending HTML back
+  return {
     statusCode: 200,
     headers: {
       'Content-Type': 'text/html',
     },
     body: generateHtmlPage(helloParagraph),
-  })
+  }
   // FINAL_END
 }
 

_instructor/core-concepts/2-http-dynamic-content/serverless.yml

@@ -3,7 +3,7 @@ service: using-dynamic-value
 
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
 
 functions:
   queryParamsExample:

_instructor/core-concepts/3-http-post-with-cors/README.md

@@ -13,6 +13,7 @@ This lesson will walk through creating an http function triggered by a `POST` re
 <!-- AUTO-GENERATED-CONTENT:START (TOC) -->
 - [Lesson Steps](#lesson-steps)
 - [Complete code](#complete-code)
+- [Locking down cors to a specific domain](#locking-down-cors-to-a-specific-domain)
 <!-- AUTO-GENERATED-CONTENT:END -->
 
 ## Lesson Steps

_instructor/core-concepts/3-http-post-with-cors/handler.js

@@ -6,7 +6,7 @@
     For additional information, see the cors docs http://bit.ly/2FlFSWB
 */
 // WORKSHOP_END
-module.exports.functionWithCors = (event, context, callback) => {
+export const functionWithCors = (event, context) => {
   const response = {
     statusCode: 200,
     // FINAL_START
@@ -22,5 +22,5 @@ module.exports.functionWithCors = (event, context, callback) => {
       event: event,
     }),
   }
-  return callback(null, response)
+  return response
 }

_instructor/core-concepts/3-http-post-with-cors/serverless.yml

@@ -3,7 +3,7 @@ service: using-http-cors-example
 
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
 
 functions:
   hello:

_instructor/core-concepts/4-using-env-vars/handler.js

@@ -8,7 +8,7 @@
     Return the environment variable in the `foo` function response
 */
 // WORKSHOP_END
-module.exports.foo = (event, context, callback) => {
+export const foo = (event, context) => {
   // FINAL_START
   console.log('process.env.MY_ENV_VAR', process.env.MY_ENV_VAR)
   /* MY_ENV_VAR_FOR_BAR will be undefined */
@@ -31,7 +31,7 @@ module.exports.foo = (event, context, callback) => {
       // FINAL_END
     }),
   }
-  return callback(null, response)
+  return response
 }
 
 // WORKSHOP_START
@@ -42,7 +42,7 @@ module.exports.foo = (event, context, callback) => {
     Return the environment variable in the `bar` function response
 */
 // WORKSHOP_END
-module.exports.bar = (event, context, callback) => {
+export const bar = (event, context) => {
   // FINAL_START
   /* both env variables will be accessible in bar */
   console.log('process.env.MY_ENV_VAR', process.env.MY_ENV_VAR)
@@ -66,5 +66,5 @@ module.exports.bar = (event, context, callback) => {
       // FINAL_END
     }),
   }
-  return callback(null, response)
+  return response
 }

_instructor/core-concepts/4-using-env-vars/serverless.yml

@@ -6,7 +6,7 @@ service: using-env-variables-example
 # WORKSHOP_END
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
   # FINAL_START
   environment:
     MY_ENV_VAR: 'hello there'

_instructor/core-concepts/5-using-serverless-variable-syntax/handler.js

@@ -1,5 +1,5 @@
 
-module.exports.foo = (event, context, callback) => {
+export const foo = (event, context) => {
   // FINAL_START
   console.log('process.env.MY_SECRET', process.env.MY_SECRET)
   // FINAL_END
@@ -15,5 +15,5 @@ module.exports.foo = (event, context, callback) => {
       message: `my super secret thing ${process.env.MY_SECRET}`
     }),
   }
-  return callback(null, response)
+  return response
 }

_instructor/core-concepts/5-using-serverless-variable-syntax/serverless.yml

@@ -6,7 +6,7 @@ service: serverless-variables-syntax-example
 # WORKSHOP_END
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
   # WORKSHOP_START
   environment:
     MY_SECRET: xyz123

_instructor/core-concepts/6-using-addition-resources/handler.js

@@ -1,23 +1,25 @@
 /* Include the AWS sdk.
  * No need to add to package.json. It's included in lambda env
 */
-const AWS = require('aws-sdk')
+import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
+import { DynamoDBDocumentClient, PutCommand, ScanCommand } from '@aws-sdk/lib-dynamodb';
 // Connect to DynamoDB
-const dynamoDb = new AWS.DynamoDB.DocumentClient()
+const client = new DynamoDBClient({});
+const dynamoDb = DynamoDBDocumentClient.from(client);
 
 // Save item in DynamoDB table
-module.exports.create = (event, context, callback) => {
+export const create = async (event, context) => {
   const timestamp = new Date().getTime()
   const body = JSON.parse(event.body)
 
   if (!body || !body.email) {
-    return callback(null, {
+    return {
       statusCode: 401,
       headers: { 'Content-Type': 'text/plain' },
       body: JSON.stringify({
         error: 'no body found or email found'
       })
-    })
+    }
   }
 
   const params = {
@@ -30,48 +32,46 @@ module.exports.create = (event, context, callback) => {
   }
 
   // write the todo to the database
-  dynamoDb.put(params, (error) => {
-    // handle potential errors
-    if (error) {
-      console.error(error)
-      return callback(null, {
-        statusCode: error.statusCode || 501,
-        headers: { 'Content-Type': 'text/plain' },
-        body: 'Couldn\'t create the dynamo item.',
-      })
-    }
-
+  try {
+    await dynamoDb.send(new PutCommand(params));
     // create a response
     const response = {
       statusCode: 200,
       body: JSON.stringify(params.Item),
     }
-    return callback(null, response)
-  })
+    return response
+  } catch (error) {
+    // handle potential errors
+    console.error(error)
+    return {
+      statusCode: error.statusCode || 501,
+      headers: { 'Content-Type': 'text/plain' },
+      body: 'Couldn\'t create the dynamo item.',
+    }
+  }
 }
 
 /* Scan a dynamoDB table and return items */
-module.exports.scan = (event, context, callback) => {
+export const scan = async (event, context) => {
   const params = {
     TableName: process.env.MY_TABLE,
   }
   // fetch all todos from the database
-  dynamoDb.scan(params, (error, result) => {
-    // handle potential errors
-    if (error) {
-      console.error(error)
-      return callback(null, {
-        statusCode: error.statusCode || 501,
-        headers: { 'Content-Type': 'text/plain' },
-        body: 'Couldn\'t fetch the todos.',
-      })
-    }
-
+  try {
+    const result = await dynamoDb.send(new ScanCommand(params));
     // create a response
     const response = {
       statusCode: 200,
       body: JSON.stringify(result.Items),
     }
-    return callback(null, response)
-  })
+    return response
+  } catch (error) {
+    // handle potential errors
+    console.error(error)
+    return {
+      statusCode: error.statusCode || 501,
+      headers: { 'Content-Type': 'text/plain' },
+      body: 'Couldn\'t fetch the todos.',
+    }
+  }
 }

_instructor/core-concepts/6-using-addition-resources/serverless.yml

@@ -3,7 +3,7 @@ service: event-driven-app
 
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
   # WORKSHOP_START
   # Step 3. In this_file, add the database table name to the service's `environment` variables. The `aws-sdk` will need to know the table name in order to access the table
   # WORKSHOP_END

_instructor/core-concepts/7-using-serverless-plugins/handler.js

@@ -1,5 +1,5 @@
 
-module.exports.hello = (event, context, callback) => {
+export const hello = (event, context) => {
   const response = {
     /* Status code required for default lambda integration */
     statusCode: 200,
@@ -8,5 +8,5 @@ module.exports.hello = (event, context, callback) => {
     }),
   }
   /** callback(error, response) */
-  return callback(null, response)
+  return response
 }

_instructor/core-concepts/7-using-serverless-plugins/package.json

@@ -3,6 +3,7 @@
   "version": "1.0.0",
   "description": "using-serverless-plugins",
   "main": "index.js",
+  "type": "module",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },

_instructor/core-concepts/7-using-serverless-plugins/serverless.yml

@@ -12,7 +12,7 @@ custom:
 
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
 
 functions:
   hello:

_instructor/core-concepts/8-using-multiple-stages/handler.js

@@ -1,5 +1,5 @@
 
-module.exports.hello = (event, context, callback) => {
+export const hello = (event, context) => {
   const response = {
     /* Status code required for default lambda integration */
     statusCode: 200,
@@ -8,5 +8,5 @@ module.exports.hello = (event, context, callback) => {
     }),
   }
   /** callback(error, response) */
-  return callback(null, response)
+  return response
 }

_instructor/core-concepts/8-using-multiple-stages/package.json

@@ -3,6 +3,7 @@
   "version": "1.0.0",
   "description": "",
   "main": "index.js",
+  "type": "module",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },

_instructor/core-concepts/8-using-multiple-stages/serverless.yml

@@ -11,7 +11,7 @@ custom:
 
 provider:
   name: aws
-  runtime: nodejs12.x
+  runtime: nodejs22.x
   # WORKSHOP_START
   # Step 4. In this_file, set the stage key to the custom.stage value set in previous step
   # WORKSHOP_END