sidebarAction.getPanel()

Gets a URL to the HTML document that defines the sidebar's contents.

This is an asynchronous function that returns a Promise.

Syntax

let gettingPanel = browser.sidebarAction.getPanel(
  details               // object
)

object. An object with the following properties:

tabId Optional: integer. Get the panel for the sidebar specific to the given tab.
windowId Optional: integer. Get the panel for the sidebar specific to the given window.

If windowId and tabId are both supplied, the function fails and the promise it returns is rejected.
If windowId and tabId are both omitted, the global panel is returned.

A Promise that will be fulfilled with a string containing the URL for the panel's document. This will be a fully qualified URL, such as:

url

moz-extension://d1d8a2eb-fe60-f646-af30-a866c5b39942/sidebar.html

BCD tables only load in the browser

Get the panel's URL:

function onGot(sidebarUrl) {
  console.log(sidebarUrl);
}

let gettingPanel = browser.sidebarAction.getPanel({});
gettingPanel.then(onGot);

Note: This API is based on Opera's chrome.sidebarAction API.