tabs.getZoom()

Gets the current zoom factor for the specified tab.

This is an asynchronous function that returns a Promise.

Syntax

var gettingZoom = browser.tabs.getZoom(
  tabId                     // optional integer
)

Parameters

tabIdOptional

integer. The ID of the tab to get the current zoom factor from. Defaults to the active tab of the current window.

Return value

A Promise that will be fulfilled with the tab's current zoom factor, as a number between 0.3 and 5. If the tab could not be found or some other error occurs, the promise will be rejected with an error message.

Examples

Get the zoom factor for the current tab:

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

function onError(error) {
  console.log(`Error: ${error}`);
}

var gettingZoom = browser.tabs.getZoom();
gettingZoom.then(onGot, onError);

Get the zoom factor for the tab whose ID is 2:

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

function onError(error) {
  console.log(`Error: ${error}`);
}

var gettingZoom = browser.tabs.getZoom(2);
gettingZoom.then(onGot, onError);

Example extensions

• tabs-tabs-tabs

Browser compatibility