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A JS Foundation Project



A connector is the interface between the rules and the website you are testing. It is responsible for loading the website and exposing all the information to sonarwhal such as resources, network data, etc.

To configure a connector you need to update your .sonarwhalrc file to make it look like the following:

"connector": {
"name": "connectorName"

Where connectorName is the name of the connector.

Built-in connectors and platform support

All the built-in connectors run in any of the supported platforms: Linux, macOS, and Windows. The only caveat is that, for the connector that you specify in the.sonarwhalrc file, you will need to have the browser the connector is for installed as sonarwhal will not install it for you.

The current supported connectors are:

  • jsdom: Your website will be loaded using jsdom.
  • chrome: Your website will be loaded using Chrome and the Chrome Debugging Protocol. This is one of the remote-debugging-connectors
  • edge: Your website will be loaded using Edge via the edge-diagnostics-adapter. You will need to run Windows 10 Creators Update or later to use it. This connector will only be installed if you are running on it. There are some known issues so please check the Edge issues section below.

Note: If you are running Windows 10 build 14951 (or later) and Windows Subsystem for Linux (WSL), sonarwhal will be capable of running the browsers installed directly on Windows. If you are a user of the stable release of Window, you will need to use at least the Fall Creators Update.


connectors can be configured. Maybe you want to do a request with another userAgent, change some of the other defaults, etc. For that, you have to add the property options to your connector property with the values you want to modify:

"connector": {
"name": "connectorName",
"options": {}

The following is the list of shared configurations for all connectors:

  • waitFor time in milliseconds the connector will wait after the site is ready before starting the DOM traversing. The default value is 1000 milliseconds.

The default value is 1000.

Depending on the connector, other configurations may be available.

jsdom configuration

jsdom allows you to configure the following:

  • headers: the headers used to fetch the resources. By default they are:
"Accept-Language": "en-US,en;q=0.8,es;q=0.6,fr;q=0.4",
"Cache-Control": "no-cache",
"DNT": 1,
"Pragma": "no-cache",
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.2924.87 Safari/537.36"

remote-debugging-connector configuration

There are some connectors built on top of the Chrome DevTools Protocol. chrome and edge are some of these connectors.

The set of settings specific for them are:

  • defaultProfile (boolean): Indicates if the browser should use the default profile or create a new one. By default the value is false so a new one is created. You might want to set it to true if you want sonarwhal to have access to pages where the default profile is already authenticated. This only applies for Google Chrome as Microsoft Edge doesn’t create a new profile.
  • useTabUrl (boolean): Indicates if the browser should navigate first to a given page before going to the final target. false by default.
  • tabUrl (string): The URL to visit before the final target in case useTabUrl is true. is the default value.
"defaultProfile": true,
"tabUrl": "",
"useTabUrl": false

Differences among connectors

Connectors are expected to implement at least some basic functionality (see how to develop a connector) but expose more events or have some extra functionality. The following document details the known differences or issues among the official connectors.


  • You need administrator privileges to run sonarwhal on Edge. You should be automatically prompted when running it.
  • It’s best to close all instances of Edge before to avoid any issues.
  • The current implementation can have some problems when scanning multiple sites simultaneously. This should not be a common scenario.
  • The connector will make use of the useTabUrl and tabUrl properties. Removing those can cause unexpected results.


  • It will not send the events for:

    • element::#document
    • element::#comment