Create a code bundle

Refer to these guidelines to create an EdgeWorkers code bundle.

EdgeWorkers functions are defined in a file entitled main.js. You also need to create a manifest file called bundle.json. These are packaged together, along with any other dependencies as a compressed .tgz file.

Create code bundle

For example, a package called mybundle.tgz includes two files:

  • main.js. The JavaScript source that contains event handler functions.

  • bundle.json. The manifest file that includes necessary meta information.


The EdgeWorkers code bundle cannot contain any executable files.

edgeworker-versionStringUnique identifier for the version
bundle-versionIntegerBundle format version
api-versionStringVersion of JavaScript API that the functions are coded against
descriptionStringDescriptive phrase for the code function
miscObjectMiscellaneous data you can include in the manifest to identify the function

Follow these steps to create the bundle.


You can also use the code bundle editor to create an EdgeWorker version.

  1. Create the JavaScript source in a file called main.js.

You can also enable subWorkers and change the default JavaScript logging level in the main.js file.

  1. Each time you create a new version of the code bundle you need to increment the edgeworker-version in the bundle.json file.
    "edgeworker-version": "1.2",
    "description" : "Perform redirect"
  1. Compress the files into a code bundle.
tar -czvf filename.tgz main.js bundle.json

Once you have created the code bundle, you can use the EdgeWorkers Management application to create an EdgeWorker version.

Enable subWorkers

To enable subWorkers you need to add the invoke-for-edgeworker-clients config setting to the bundle.json file and set it to true. For more information, go to Create a subWorker in this guide.

subrequestIncludes config settings for sub-requests. Currently it only includes “invoke-for-edgeworkers-client”.
invoke-for-edgeworkers-clientWhen set to true, it enables support for subWorkers. By default, this configuration setting is set to false.
    "edgeworker-version": "0.2",  
    "description" : "Hello World Example",
    "config": {  
        "subrequest": {  
            "invoke-for-edgeworker-clients": true  


If the configuration setting is set to false or not included, the EdgeWorkers function will return an information status 22, SubworkerNotEnabled, if a sub-request is made to the EdgeWorkers URL. The sub-request will continue to process without invoking the EdgeWorker.

Change the default JavaScript logging level

You can set the JavaScript logging in the code bundle and deliver these logs using a DataStream 2 stream. By default, JavaScript logs are set to ERROR.


For more information about how to deliver the logs, go to the Use DataStream 2 to deliver JavaScript logs tutorial.

To change the default JavaScript log level you need to add the logging config setting to the bundle.json file.

levelThe log level applied to the EdgeWorkers code bundle. You can use this parameter to override the default log level, ERROR.
The log levels are trace, debug, info, warn, and error.
schemaNot currently in use. Use v1 as a placeholder.
ds2idThe DataStream2 stream id to associate with the log data.
The stream needs to be active before you include it in the EdgeWorkers code bundle.
When you add the logging config setting to the bundle.json file, the ds2id is required.

You can change the ds2id using the EdgeWorkers CLI.

  "edgeworker-version": "1.2.3",
  "bundle-version": 1,
  "api-version": "0.3",
  "description": "A bundle describing overriding the default log level.",
  "config": {
          "logging": {
                  "level": "info",
                  "schema": "v1",
                  "ds2id": 1234