openSubtab()

Opens a new subtab (within a primary tab) that displays the content of a specified URL, which can be relative or absolute. You can also override an existing subtab. Use to open a new subtab on a primary tab via the primary tab’s ID. This method is only available in API version 20.0 or later.

If there’s an error opening the tab, the error code is reported in the JavaScript console.

Name	Type	Description
`primaryTabId`	string	ID of the primary tab in which the subtab opened.
`url`	URL	URL of the opened subtab. If the URL is to a Salesforce object, that object displays as specified in the Salesforce console app settings. For example, if cases are set to open as a primary tab, and `openSubtab()` is called on a case, the case opens as a primary tab. Users can open an external URL if it’s been added to the console’s allowlist. When using a relative URL, make sure that you include "/" at the beginning of your URL. When pointing to a Visualforce page, use "/apex/" at the beginning of your URL. Otherwise, your URL might not work as expected.
`active`	boolean	If `true` , the opened subtab displays immediately. If `false` , the opened subtab displays in the background and the current tab maintains focus.
`tabLabel`	string	Optional label of the opened subtab. If a label isn't specified, `External Page` displays. Add labels as text; HTML isn't supported.
`id`	string	ID of the subtab to override. Use `null` to create a new subtab.
`callback`	function	JavaScript method called upon completion of the method.
`name`	string	Optional name of the opened subtab. This argument is only available in API version 22.0 and later.

To see this example in action, click the custom link on a case. For more information, see Define Custom Buttons and Links in the Salesforce help.

This method is asynchronous so it returns its response in an object in a callback method. The response object contains the following fields:

Name	Type	Description
`success`	boolean	`true` if the subtab successfully opened; `false` if the subtab didn’t open.
`id`	string	ID of the subtab. IDs are only valid during a user session; IDs become invalid when the user leaves the Salesforce console.