tabs.removeCSS()
Removes from a page CSS which was previously injected by a call to tabs.insertCSS()
.
This is an asynchronous function that returns a Promise
.
Syntax
var removing = browser.tabs.removeCSS(
tabId, // optional integer
details // object
)
Parameters
tabId
Optionalinteger
. The ID of the tab from which to remove the CSS. Defaults to the active tab of the current window.details
- An object describing the CSS to remove from the page. It contains the following properties:
allFrames
Optionalboolean
. Iftrue
, the code will be removed from all frames of the current page. If it isfalse
, code is only removed from the top frame. Defaults tofalse
.code
Optionalstring
. CSS to remove, as a text string. This must exactly match a CSS string previously inserted into the page usingtabs.insertCSS()
.cssOrigin
Optionalstring
. This can take one of two values: "user", for CSS added as a user stylesheet, or "author" for CSS added as an author stylesheet. If this option was set previously bytabs.insertCSS()
, then it must exactly match.file
Optionalstring
. Path to a file containing the CSS to remove. This must exactly match a CSS file previously inserted into the page usingtabs.insertCSS()
.frameId
Optionalinteger
. The frame from which to remove the CSS. Defaults to0
(the top-level frame).matchAboutBlank
Optionalboolean
. Iftrue
, the CSS will be removed from embedded "about:blank" and "about:srcdoc" frames if your extension has access to their parent document. Defaults tofalse
.
Return value
A Promise
that will be fulfilled with no arguments when all the CSS has been removed. If any error occurs, the promise will be rejected with an error message.
Examples
This example adds some CSS using tabs.insertCSS
, then removes it again when the user clicks a browser action:
var css = "body { border: 20px dotted pink; }";
function onError(error) {
console.log(`Error: ${error}`);
}
var insertingCSS = browser.tabs.insertCSS(2, {code: css});
insertingCSS.then(null, onError);
browser.browserAction.onClicked.addListener(() => {
var removing = browser.tabs.removeCSS(2, {code: css});
removing.then(null, onError);
});
Example extensions
Browser compatibility
Report problems with this compatibility data on GitHubwebextensions-desktop | webextensions-mobile | |||||
---|---|---|---|---|---|---|
removeCSS | ChromeNo supportNo | EdgeNo supportNo | FirefoxFull support49 | OperaNo supportNo | SafariFull support14 | Firefox for AndroidFull support54 |
Legend
- Full support
- Full support
- No support
- No support
The compatibility table on 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.
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.