tabs.removeCSS()
Removes from a page CSS which was previously injected by a call to tabs.insertCSS()
.
Note:
When using Manifest V3 or higher, use scripting.insertCSS()
and scripting.removeCSS()
to insert and remove CSS.
This is an asynchronous function that returns a Promise
.
Syntax
let removing = browser.tabs.removeCSS(
tabId, // optional integer
details // object
)
Parameters
tabId
Optional-
integer
. 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
Optional-
boolean
. 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
Optional-
string
. CSS to remove, as a text string. This must exactly match a CSS string previously inserted into the page usingtabs.insertCSS()
. cssOrigin
Optional-
string
. 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
Optional-
string
. Path to a file containing the CSS to remove. This must exactly match a CSS file previously inserted into the page usingtabs.insertCSS()
. frameId
Optional-
integer
. The frame from which to remove the CSS. Defaults to0
(the top-level frame). matchAboutBlank
Optional-
boolean
. 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:
let css = "body { border: 20px dotted pink; }";
function onError(error) {
console.log(`Error: ${error}`);
}
let insertingCSS = browser.tabs.insertCSS(2, { code: css });
insertingCSS.then(null, onError);
browser.browserAction.onClicked.addListener(() => {
let removing = browser.tabs.removeCSS(2, { code: css });
removing.then(null, onError);
});
Example extensions
Browser compatibility
BCD tables only load in the browser
Note:
This API is based on Chromium's chrome.tabs
API. This documentation is derived from tabs.json
in the Chromium code.