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
.
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
. If true
, the code will be removed from all frames of the current page. If it is false
, code is only removed from the top frame. Defaults to false
.
code
Optional
string
. CSS to remove, as a text string. This must exactly match a CSS string previously inserted into the page using tabs.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 by tabs.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 using tabs.insertCSS()
.
frameId
Optional
integer
. The frame from which to remove the CSS. Defaults to 0
(the top-level frame).
matchAboutBlank
Optional
boolean
. If true
, the CSS will be removed from embedded "about:blank" and "about:srcdoc" frames if your extension has access to their parent document. Defaults to false
.
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.
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
Note: This API is based on Chromium's chrome.tabs
API. This documentation is derived from tabs.json
in the Chromium code.
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