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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

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
getZoom
Yes
79
45
?
Yes
14
?
?
No
?
?
?

Note: 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.

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/getZoom