mirror of
https://github.com/gorhill/uBlock.git
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80 lines
2.6 KiB
JavaScript
80 lines
2.6 KiB
JavaScript
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/*******************************************************************************
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uBlock Origin - a comprehensive, efficient content blocker
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Copyright (C) 2025-present Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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import { registerScriptlet } from './base.js';
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import { safeSelf } from './safe-self.js';
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/**
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* @scriptlet prevent-innerHTML
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*
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* @description
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* Conditionally prevent assignment to `innerHTML` property.
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*
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* @param [selector]
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* Optional. The element must matches `selector` for the prevention to take
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* place.
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*
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* @param [pattern]
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* Optional. A pattern to match against the assigned value. The pattern can be
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* a plain string, or a regex. Prepend with `!` to reverse the match condition.
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*
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* */
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export function preventInnerHTML(
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selector = '',
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pattern = ''
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) {
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const safe = safeSelf();
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const logPrefix = safe.makeLogPrefix('prevent-innerHTML', selector, pattern);
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const matcher = safe.initPattern(pattern, { canNegate: true });
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const current = safe.Object_getOwnPropertyDescriptor(Element.prototype, 'innerHTML');
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if ( current === undefined ) { return; }
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const shouldPreventSet = a => {
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if ( selector !== '' ) {
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if ( typeof this.matches === 'function' === false ) { return false; }
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if ( this.matches(selector) === false ) { return false; }
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}
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return safe.testPattern(matcher, a);
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};
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Object.defineProperty(Element.prototype, 'innerHTML', {
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get: function() {
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return current.get
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? current.get.call(this)
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: current.value;
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},
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set: function(a) {
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if ( shouldPreventSet(a) ) {
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safe.uboLog(logPrefix, 'Prevented');
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} else if ( current.set ) {
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current.set.call(this, a);
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}
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current.value = a;
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},
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});
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}
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registerScriptlet(preventInnerHTML, {
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name: 'prevent-innerHTML.js',
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dependencies: [
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safeSelf,
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],
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});
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