aws_sdk_v3_lambda_list_functions_quickstart.ts

1import { LambdaClient, ListFunctionsCommand, FunctionConfiguration } from "@aws-sdk/client-lambda";
2
3/**
4 * List the Lambda functions in your account.
5 */
6export const main = async (): Promise<void> => {
7  // Create an instance of the Lambda client.
8  // The region is automatically pulled from your environment or configuration.
9  const client = new LambdaClient({});
10
11  try {
12    // Create the command to list functions.
13    const command = new ListFunctionsCommand({});
14
15    // Send the command and capture the response.
16    const response = await client.send(command);
17
18    const functions: FunctionConfiguration[] = response.Functions || [];
19
20    if (functions.length === 0) {
21      console.log("No functions found in this region.");
22    } else {
23      console.log("Your Lambda functions:");
24      functions.forEach((func) => {
25        console.log(` - ${func.FunctionName} (${func.Runtime})`);
26      });
27    }
28  } catch (err) {
29    console.error("Error listing functions:", err);
30  }
31};
32
33// Execute the function if this file is run directly.
34if (require.main === module) {
35  main();
36}