The AWS SDK for JavaScript v2 has reached end-of-support. We recommend that you migrate to [AWS SDK for JavaScript v3](https://docs.aws.amazon.com//sdk-for-javascript/v3/developer-guide/). For additional details and information on how to migrate, please refer to this [announcement](https://aws.amazon.com/blogs//developer/announcing-end-of-support-for-aws-sdk-for-javascript-v2/).

# Managing Visibility Timeout in Amazon SQS
<a name="sqs-examples-managing-visibility-timeout"></a>

![\[JavaScript code example that applies to Node.js execution\]](http://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/images/nodeicon.png)

**This Node.js code example shows:**
+ How to specify the time interval during which messages received by a queue are not visible.

## The Scenario
<a name="sqs-examples-managing-visibility-timeout-scenario"></a>

In this example, a Node.js module is used to manage visibility timeout. The Node.js module uses the SDK for JavaScript to manage visibility timeout by using this method of the `AWS.SQS` client class:
+ [https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/SQS.html#changeMessageVisibility-property](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/SQS.html#changeMessageVisibility-property)

For more information about Amazon SQS visibility timeout, see [Visibility Timeout](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-visibility-timeout.html) in the *Amazon Simple Queue Service Developer Guide*.

## Prerequisite Tasks
<a name="sqs-examples-managing-visibility-timeout-prerequisites"></a>

To set up and run this example, you must first complete these tasks:
+ Install Node.js. For more information about installing Node.js, see the [Node.js website](https://nodejs.org).
+ Create a shared configurations file with your user credentials. For more information about providing a shared credentials file, see [Loading Credentials in Node.js from the Shared Credentials File](loading-node-credentials-shared.md).
+ Create an Amazon SQS queue. For an example of creating a queue, see [Using Queues in Amazon SQS](sqs-examples-using-queues.md).
+ Send a message to the queue. For an example of sending a message to a queue, see [Sending and Receiving Messages in Amazon SQS](sqs-examples-send-receive-messages.md).

## Changing the Visibility Timeout
<a name="sqs-examples-managing-visibility-timeout-setting"></a>

Create a Node.js module with the file name `sqs_changingvisibility.js`. Be sure to configure the SDK as previously shown. To access Amazon Simple Queue Service, create an `AWS.SQS` service object. Receive the message from the queue.

Upon receipt of the message from the queue, create a JSON object containing the parameters needed for setting the timeout, including the URL of the queue containing the message, the `ReceiptHandle` returned when the message was received, and the new timeout in seconds. Call the `changeMessageVisibility` method. 

```
// Load the AWS SDK for Node.js
var AWS = require("aws-sdk");
// Set the region to us-west-2
AWS.config.update({ region: "us-west-2" });

// Create the SQS service object
var sqs = new AWS.SQS({ apiVersion: "2012-11-05" });

var queueURL = "https://sqs.REGION.amazonaws.com/ACCOUNT-ID/QUEUE-NAME";

var params = {
  AttributeNames: ["SentTimestamp"],
  MaxNumberOfMessages: 1,
  MessageAttributeNames: ["All"],
  QueueUrl: queueURL,
};

sqs.receiveMessage(params, function (err, data) {
  if (err) {
    console.log("Receive Error", err);
  } else {
    // Make sure we have a message
    if (data.Messages != null) {
      var visibilityParams = {
        QueueUrl: queueURL,
        ReceiptHandle: data.Messages[0].ReceiptHandle,
        VisibilityTimeout: 20, // 20 second timeout
      };
      sqs.changeMessageVisibility(visibilityParams, function (err, data) {
        if (err) {
          console.log("Delete Error", err);
        } else {
          console.log("Timeout Changed", data);
        }
      });
    } else {
      console.log("No messages to change");
    }
  }
});
```

To run the example, type the following at the command line.

```
node sqs_changingvisibility.js
```

This sample code can be found [here on GitHub](https://github.com/awsdocs/aws-doc-sdk-examples/tree/master/javascript/example_code/sqs/sqs_changingvisibility.js).