Creates a data URI encoding an image of the visible area of the currently active tab in the specified window. You must have the <all_urls>
permission to use this method.
This is an asynchronous function that returns a Promise
.
Syntax
var capturing = browser.tabs.captureVisibleTab( windowId, // optional integer options // optional extensionTypes.ImageDetails )
Parameters
windowId
Optionalinteger
. The target window. Defaults to the current window.options
OptionalextensionTypes.ImageDetails
.Values of this type are objects. They contain the following properties:
format
OptionalextensionTypes.ImageFormat
. The format of the resulting image. Default is"jpeg"
.quality
Optionalinteger
. When format is"jpeg"
, this controls the quality of the resulting image. It is a number between 0 and 100, which is converted to a value between 0 and 1 and then used as theencoderOptions
argument toHTMLCanvasElement.toDataURL()
. If is is omitted, 92 is used. As quality is decreased, the resulting image will have more visual artifacts, and the number of bytes needed to store it will decrease. This value is ignored for PNG images.
Return value
A Promise
that will be fulfilled with a data URL which encodes an image of the visible area of the captured tab. May be assigned to the 'src' property of an HTML Image element for display. If any error occurs the promise will be rejected with an error message.
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Chrome | Edge | Firefox | Firefox for Android | Opera | |
---|---|---|---|---|---|
Basic support | Yes | 15 | 47 | 54 | Yes |
Examples
Capture an image of the active tab in the current window, with default settings:
function onCaptured(imageUri) { console.log(imageUri); } function onError(error) { console.log(`Error: ${error}`); } browser.browserAction.onClicked.addListener(function() { var capturing = browser.tabs.captureVisibleTab(); capturing.then(onCaptured, onError); });
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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