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uBlock/platform/mv3/scriptlets/css-procedural.template.js
Raymond Hill 6dbbb95b04
[mv3] Mitigation: Inject CSS user styles to enforce cosmetic filtering
Related issues:
- https://github.com/uBlockOrigin/uBOL-issues/issues/5#issuecomment-1575425913
- https://github.com/w3c/webextensions/issues/403

Currently, there is no other way to inject CSS user styles than to
wake up the service worker, so that it can inject the CSS styles
itself using the `scripting.insertCSS()` method.

If ever the MV3 API supports injecting CSS user styles directly
from a content script, uBOL will be back to be fully declarative.

At this point the service worker is very lightweight since the
filtering is completely  declarative, so this is not too much of
an issue performance-wise except for the fact that waking up the
service worker for the sole purpose of injecting CSS user styles
and nothing else introduces a pointless overhead.

Hopefully the MV3 API will mature to address such inefficiency.
2023-06-04 11:32:55 -04:00

52 lines
1.7 KiB
JavaScript

/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2014-present Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* jshint esversion:11 */
'use strict';
// ruleset: $rulesetId$
/******************************************************************************/
// Important!
// Isolate from global scope
(function uBOL_cssProceduralImport() {
/******************************************************************************/
const argsList = self.$argsList$;
const hostnamesMap = new Map(self.$hostnamesMap$);
const entitiesMap = new Map(self.$entitiesMap$);
const exceptionsMap = new Map(self.$exceptionsMap$);
self.proceduralImports = self.proceduralImports || [];
self.proceduralImports.push({ argsList, hostnamesMap, entitiesMap, exceptionsMap });
/******************************************************************************/
})();
/******************************************************************************/