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 3. If the tab could not be found or some other error occurs, the promise will be rejected with an error message.

Browser compatibility

Chrome Edge Firefox Firefox for Android Opera
Basic support Yes No 45.0 No 33

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);

Acknowledgements

This API is based on Chromium's chrome.tabs API. This documentation is derived from tabs.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

 Contributors to this page: wbamberg, Makyen
 Last updated by: wbamberg,