\nOverview\n
\nLambda is a compute service that lets you run code without provisioning or managing servers.\nLambda runs your code on a high-availability compute infrastructure and performs all of the\nadministration of the compute resources, including server and operating system maintenance, capacity provisioning\nand automatic scaling, code monitoring and logging. With Lambda, you can run code for virtually any\ntype of application or backend service. For more information about the Lambda service, see What is Lambda in the Lambda Developer Guide.
\nThe Lambda API Reference provides information about\neach of the API methods, including details about the parameters in each API request and\nresponse.
\n\nYou can use Software Development Kits (SDKs), Integrated Development Environment (IDE) Toolkits, and command\nline tools to access the API. For installation instructions, see Tools for\nAmazon Web Services.
\nFor a list of Region-specific endpoints that Lambda supports,\nsee Lambda\nendpoints and quotas in the Amazon Web Services General Reference..
\nWhen making the API calls, you will need to\nauthenticate your request by providing a signature. Lambda supports signature version 4. For more information,\nsee Signature Version 4 signing process in the\nAmazon Web Services General Reference..
\n\nCA certificates\n
\nBecause Amazon Web Services SDKs use the CA certificates from your computer, changes to the certificates on the Amazon Web Services servers\ncan cause connection failures when you attempt to use an SDK. You can prevent these failures by keeping your\ncomputer's CA certificates and operating system up-to-date. If you encounter this issue in a corporate\nenvironment and do not manage your own computer, you might need to ask an administrator to assist with the\nupdate process. The following list shows minimum operating system and Java versions:
\nMicrosoft Windows versions that have updates from January 2005 or later installed contain at least one\nof the required CAs in their trust list.
\nMac OS X 10.4 with Java for Mac OS X 10.4 Release 5 (February 2007), Mac OS X 10.5 (October 2007), and\nlater versions contain at least one of the required CAs in their trust list.
\nRed Hat Enterprise Linux 5 (March 2007), 6, and 7 and CentOS 5, 6, and 7 all contain at least one of the\nrequired CAs in their default trusted CA list.
\nJava 1.4.2_12 (May 2006), 5 Update 2 (March 2005), and all later versions, including Java 6 (December\n2006), 7, and 8, contain at least one of the required CAs in their default trusted CA list.
\nWhen accessing the Lambda management console or Lambda API endpoints, whether through browsers or\nprogrammatically, you will need to ensure your client machines support any of the following CAs:
\nAmazon Root CA 1
\nStarfield Services Root Certificate Authority - G2
\nStarfield Class 2 Certification Authority
\nRoot certificates from the first two authorities are available from Amazon trust services, but keeping your computer\nup-to-date is the more straightforward solution. To learn more about ACM-provided certificates, see Amazon Web Services Certificate Manager FAQs.\n
\n\n## Installing\n\nTo install this package, simply type add or install @aws-sdk/client-lambda\nusing your favorite package manager:\n\n- `npm install @aws-sdk/client-lambda`\n- `yarn add @aws-sdk/client-lambda`\n- `pnpm add @aws-sdk/client-lambda`\n\n## Getting Started\n\n### Import\n\nThe AWS SDK is modulized by clients and commands.\nTo send a request, you only need to import the `LambdaClient` and\nthe commands you need, for example `ListLayersCommand`:\n\n```js\n// ES5 example\nconst { LambdaClient, ListLayersCommand } = require(\"@aws-sdk/client-lambda\");\n```\n\n```ts\n// ES6+ example\nimport { LambdaClient, ListLayersCommand } from \"@aws-sdk/client-lambda\";\n```\n\n### Usage\n\nTo send a request, you:\n\n- Initiate client with configuration (e.g. credentials, region).\n- Initiate command with input parameters.\n- Call `send` operation on client with command object as input.\n- If you are using a custom http handler, you may call `destroy()` to close open connections.\n\n```js\n// a client can be shared by different commands.\nconst client = new LambdaClient({ region: \"REGION\" });\n\nconst params = {\n /** input parameters */\n};\nconst command = new ListLayersCommand(params);\n```\n\n#### Async/await\n\nWe recommend using [await](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await)\noperator to wait for the promise returned by send operation as follows:\n\n```js\n// async/await.\ntry {\n const data = await client.send(command);\n // process data.\n} catch (error) {\n // error handling.\n} finally {\n // finally.\n}\n```\n\nAsync-await is clean, concise, intuitive, easy to debug and has better error handling\nas compared to using Promise chains or callbacks.\n\n#### Promises\n\nYou can also use [Promise chaining](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises#chaining)\nto execute send operation.\n\n```js\nclient.send(command).then(\n (data) => {\n // process data.\n },\n (error) => {\n // error handling.\n }\n);\n```\n\nPromises can also be called using `.catch()` and `.finally()` as follows:\n\n```js\nclient\n .send(command)\n .then((data) => {\n // process data.\n })\n .catch((error) => {\n // error handling.\n })\n .finally(() => {\n // finally.\n });\n```\n\n#### Callbacks\n\nWe do not recommend using callbacks because of [callback hell](http://callbackhell.com/),\nbut they are supported by the send operation.\n\n```js\n// callbacks.\nclient.send(command, (err, data) => {\n // process err and data.\n});\n```\n\n#### v2 compatible style\n\nThe client can also send requests using v2 compatible style.\nHowever, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post\non [modular packages in AWS SDK for JavaScript](https://aws.amazon.com/blogs/developer/modular-packages-in-aws-sdk-for-javascript/)\n\n```ts\nimport * as AWS from \"@aws-sdk/client-lambda\";\nconst client = new AWS.Lambda({ region: \"REGION\" });\n\n// async/await.\ntry {\n const data = await client.listLayers(params);\n // process data.\n} catch (error) {\n // error handling.\n}\n\n// Promises.\nclient\n .listLayers(params)\n .then((data) => {\n // process data.\n })\n .catch((error) => {\n // error handling.\n });\n\n// callbacks.\nclient.listLayers(params, (err, data) => {\n // process err and data.\n});\n```\n\n### Troubleshooting\n\nWhen the service returns an exception, the error will include the exception information,\nas well as response metadata (e.g. request id).\n\n```js\ntry {\n const data = await client.send(command);\n // process data.\n} catch (error) {\n const { requestId, cfId, extendedRequestId } = error.$metadata;\n console.log({ requestId, cfId, extendedRequestId });\n /**\n * The keys within exceptions are also parsed.\n * You can access them by specifying exception names:\n * if (error.name === 'SomeServiceException') {\n * const value = error.specialKeyInException;\n * }\n */\n}\n```\n\n## Getting Help\n\nPlease use these community resources for getting help.\nWe use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.\n\n- Visit [Developer Guide](https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/welcome.html)\n or [API Reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/index.html).\n- Check out the blog posts tagged with [`aws-sdk-js`](https://aws.amazon.com/blogs/developer/tag/aws-sdk-js/)\n on AWS Developer Blog.\n- Ask a question on [StackOverflow](https://stackoverflow.com/questions/tagged/aws-sdk-js) and tag it with `aws-sdk-js`.\n- Join the AWS JavaScript community on [gitter](https://gitter.im/aws/aws-sdk-js-v3).\n- If it turns out that you may have found a bug, please [open an issue](https://github.com/aws/aws-sdk-js-v3/issues/new/choose).\n\nTo test your universal JavaScript code in Node.js, browser and react-native environments,\nvisit our [code samples repo](https://github.com/aws-samples/aws-sdk-js-tests).\n\n## Contributing\n\nThis client code is generated automatically. Any modifications will be overwritten the next time the `@aws-sdk/client-lambda` package is updated.\nTo contribute to client you can check our [generate clients scripts](https://github.com/aws/aws-sdk-js-v3/tree/main/scripts/generate-clients).\n\n## License\n\nThis SDK is distributed under the\n[Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0),\nsee LICENSE for more information.\n\n## Client Commands (Operations List)\n\n