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@aws-sdk/client-lambda
Advanced tools
AWS SDK for JavaScript Lambda Client for Node.js, Browser and React Native
The @aws-sdk/client-lambda package is a client library for AWS Lambda that allows developers to interact with the AWS Lambda service programmatically. It provides methods to create, update, delete, and invoke Lambda functions, as well as manage function configurations, aliases, and versions.
Invoke a Lambda function
This feature allows you to invoke an AWS Lambda function with optional payload. The response includes the result of the function execution.
{"const { LambdaClient, InvokeCommand } = require('@aws-sdk/client-lambda');
const client = new LambdaClient({ region: 'us-west-2' });
const params = {
FunctionName: 'my-lambda-function',
Payload: Buffer.from(JSON.stringify({ key: 'value' }))
};
const command = new InvokeCommand(params);
client.send(command).then((response) => {
console.log(response);
}).catch((error) => {
console.error(error);
});"}
Create a Lambda function
This feature allows you to create a new AWS Lambda function by specifying the code, function name, handler, role, and runtime.
{"const { LambdaClient, CreateFunctionCommand } = require('@aws-sdk/client-lambda');
const client = new LambdaClient({ region: 'us-west-2' });
const params = {
Code: { /* code properties */ },
FunctionName: 'my-new-function',
Handler: 'index.handler',
Role: 'arn:aws:iam::123456789012:role/lambda-role',
Runtime: 'nodejs12.x'
};
const command = new CreateFunctionCommand(params);
client.send(command).then((response) => {
console.log(response);
}).catch((error) => {
console.error(error);
});"}
List Lambda functions
This feature allows you to list all of your AWS Lambda functions in a specific region.
{"const { LambdaClient, ListFunctionsCommand } = require('@aws-sdk/client-lambda');
const client = new LambdaClient({ region: 'us-west-2' });
const command = new ListFunctionsCommand({});
client.send(command).then((response) => {
console.log(response.Functions);
}).catch((error) => {
console.error(error);
});"}
The 'aws-sdk' package is the previous version of the AWS SDK for JavaScript. It provides similar functionalities to interact with AWS Lambda and other AWS services. However, @aws-sdk/client-lambda is part of the modular AWS SDK for JavaScript (v3), which allows for importing only the specific clients needed, potentially reducing bundle sizes and improving load times.
The 'serverless' package is a framework for building serverless applications using AWS Lambda and other cloud providers. It provides a higher-level abstraction for deploying and managing serverless functions, whereas @aws-sdk/client-lambda is a lower-level client for direct interaction with the AWS Lambda service API.
The 'claudia' package is a deployment tool for AWS Lambda and API Gateway. It simplifies the process of deploying Node.js projects to AWS Lambda. While Claudia focuses on the deployment aspect, @aws-sdk/client-lambda provides a programmatic interface for managing and invoking Lambda functions.
AWS SDK for JavaScript Lambda Client for Node.js, Browser and React Native.
AWS Lambda
Overview
This is the AWS Lambda API Reference. The AWS Lambda Developer Guide provides additional information. For the service overview, see What is AWS Lambda, and for information about how the service works, see AWS Lambda: How it Works in the AWS Lambda Developer Guide.
To install the this package, simply type add or install @aws-sdk/client-lambda using your favorite package manager:
npm install @aws-sdk/client-lambda
yarn add @aws-sdk/client-lambda
pnpm add @aws-sdk/client-lambda
The AWS SDK is modulized by clients and commands.
To send a request, you only need to import the LambdaClient
and
the commands you need, for example AddLayerVersionPermissionCommand
:
// ES5 example
const { LambdaClient, AddLayerVersionPermissionCommand } = require("@aws-sdk/client-lambda");
// ES6+ example
import { LambdaClient, AddLayerVersionPermissionCommand } from "@aws-sdk/client-lambda";
To send a request, you:
send
operation on client with command object as input.destroy()
to close open connections.// a client can be shared by difference commands.
const client = new LambdaClient({ region: "REGION" });
const params = {
/** input parameters */
};
const command = new AddLayerVersionPermissionCommand(params);
We recommend using await operator to wait for the promise returned by send operation as follows:
// async/await.
try {
const data = await client.send(command);
// process data.
} catch (error) {
// error handling.
} finally {
// finally.
}
Async-await is clean, concise, intuitive, easy to debug and has better error handling as compared to using Promise chains or callbacks.
You can also use Promise chaining to execute send operation.
client.send(command).then(
(data) => {
// process data.
},
(error) => {
// error handling.
}
);
Promises can also be called using .catch()
and .finally()
as follows:
client
.send(command)
.then((data) => {
// process data.
})
.catch((error) => {
// error handling.
})
.finally(() => {
// finally.
});
We do not recommend using callbacks because of callback hell, but they are supported by the send operation.
// callbacks.
client.send(command, (err, data) => {
// proccess err and data.
});
The client can also send requests using v2 compatible style. However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post on modular packages in AWS SDK for JavaScript
import * as AWS from "@aws-sdk/client-lambda";
const client = new AWS.Lambda({ region: "REGION" });
// async/await.
try {
const data = client.addLayerVersionPermission(params);
// process data.
} catch (error) {
// error handling.
}
// Promises.
client
.addLayerVersionPermission(params)
.then((data) => {
// process data.
})
.catch((error) => {
// error handling.
});
// callbacks.
client.addLayerVersionPermission(params, (err, data) => {
// proccess err and data.
});
When the service returns an exception, the error will include the exception information, as well as response metadata (e.g. request id).
try {
const data = await client.send(command);
// process data.
} catch (error) {
const { requestId, cfId, extendedRequestId } = error.$metadata;
console.log({ requestId, cfId, extendedRequestId });
/**
* The keys within exceptions are also parsed.
* You can access them by specifying exception names:
* if (error.name === 'SomeServiceException') {
* const value = error.specialKeyInException;
* }
*/
}
Please use these community resources for getting help. We use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.
aws-sdk-js
on AWS Developer Blog.aws-sdk-js
.To test your universal JavaScript code in Node.js, browser and react-native environments, visit our code samples repo.
This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-lambda
package is updated.
To contribute to client you can check our generate clients scripts.
This SDK is distributed under the Apache License, Version 2.0, see LICENSE for more information.
FAQs
AWS SDK for JavaScript Lambda Client for Node.js, Browser and React Native
The npm package @aws-sdk/client-lambda receives a total of 2,728,922 weekly downloads. As such, @aws-sdk/client-lambda popularity was classified as popular.
We found that @aws-sdk/client-lambda demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 5 open source maintainers collaborating on the project.
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