Version: 10.16.0


Solace JavaScript Messaging API

Copyright 2011-2024 Solace Corporation. All rights reserved.

This software is proprietary software of Solace Corporation and intended only for use in conjunction with one or more Solace Message Routers. By using this software, you are agreeing to the license terms and conditions located at


This is the Solace JavaScript Messaging API. This API allows JavaScript browser and mobile applications to send and receive messages to and from a Solace Messaging Router.


A zip package is included with this distribution. The file is named solclientjs-<version>.zip and includes:


The docs for the solclientjs API is no longer part of this distribution but can be found online here:

You can find additional resources about Solace development and ask questions within the Solace developer community here: Solace Developer Community


Tutorials and samples with detailed instructions how to run them, are available on GitHub from the following location: Solace Samples: JavaScript


There are different variations of the API that can be used. The differences between them include available logging verbosity and whether or not the API has been minified.

When the available logging verbosity has been reduced, this is done to improve the performance the application but this reduces the ability to debug problems.

Minified libraries are both smaller and optimized for performance. However, this comes at the expense of making debugging more difficult.

The following table summarizes the available API variations:

| Variation  | Minified | Available Logs           |
| Debug      | No       | All                      |
| Full       | No       | INFO, WARN, ERROR, FATAL |
| Production | Yes      | INFO, WARN, ERROR, FATAL |

To load an API variation, use one of the following statements:

    <script src="solclient.js"></script>       <!-- production -->
OR  <script src="solclient-full.js"></script>  <!-- full       -->
OR  <script src="solclient-debug.js"></script> <!-- debug      -->


The API has the concept of an initialization profile. The intent of the profile is to allow old applications to remain compatible with old versions of the API, while allowing new users to take advantage of new recommended defaults.

When writing a new application, it is recommended to choose the newest factory profile. For example, if version10 is the newest available factory profile, this snippet demonstrates how to initialize the API:

var factoryProps = new solace.SolclientFactoryProperties();
factoryProps.profile = solace.SolclientFactoryProfiles.version10;

For backwards compatibility with applications written before the concept of API profiles were introduced, the default profile is version7.

IMPORTANT: solace.SolclientFactory.init should be called before any other API function is invoked.


The default log level of the API is INFO. If you want to change the log level, use the solace.SolclientFactory#setLogLevel method after calling solace.SolclientFactory#init.

The following snippet shows how to load the debug API, select the version10 API profile, and set the log level to TRACE, the most verbose log level:

    <script src="solclient-debug.js"></script>
    <script type="text/javascript">
        var properties = new solace.SolclientFactoryProperties();
        properties.profile = solace.SolclientFactoryProfiles.version10;