Persistently disable/re-enable custom subreddit styles via a userscript command
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// ==UserScript==
// @name Reddit Toggle Custom CSS
// @description Persistently disable/re-enable custom subreddit styles via a userscript command
// @author chocolateboy
// @copyright chocolateboy
// @version 1.4.2
// @namespace https://github.com/chocolateboy/userscripts
// @license GPL: http://www.gnu.org/copyleft/gpl.html
// @include http://reddit.com/r/*
// @include https://reddit.com/r/*
// @include http://*.reddit.com/r/*
// @include https://*.reddit.com/r/*
// @grant GM_deleteValue
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// @run-at document-start
// @inject-into auto
// ==/UserScript==
// inspired by: http://userscripts-mirror.org/scripts/show/109818
const CUSTOM_CSS = 'link[ref^="applied_subreddit_"]'
const DISABLE_CSS = false
const SUBREDDIT = location.pathname.match(/\/r\/(\w+)/)[1]
function disableCss () {
// NOTE we need to disable the display rather than setting its visibility to
// hidden as the latter doesn't hide the background (which leads to a flash
// of styled content (FOSC) on subreddits with a custom background color
// and/or image)
// XXX hide the HTML element rather than the BODY element as the latter
// still results in a FOSC on some subreddits e.g. /r/firefox
// the definition of document-start varies between userscript engines and
// may vary for the same userscript engine across different browser engines.
// currently, the following userscript-engines/browsers all expose
// document.documentElement (in fact, they all expose document.head as well,
// currently, though that is not guaranteed [1] [2]):
//
// - Greasemonkey 4 [3]
// - Tampermonkey for Firefox
// - Violentmonkey for Chrome
// - Violentmonkey for Firefox
//
// [1] https://github.com/violentmonkey/violentmonkey/releases/tag/v2.12.8rc16
// [2] https://github.com/Tampermonkey/tampermonkey/issues/211#issuecomment-317116595
// [3] Greasemonkey isn't supported as it doesn't support GM_registerMenuCommand
const { style } = document.documentElement
style.display = 'none'
document.addEventListener('DOMContentLoaded', () => {
document.querySelector(CUSTOM_CSS).disabled = true
style.removeProperty('display')
})
}
function toggle () {
const disableCss = !GM_getValue(SUBREDDIT, DISABLE_CSS)
document.querySelector(CUSTOM_CSS).disabled = disableCss
if (disableCss === DISABLE_CSS) {
GM_deleteValue(SUBREDDIT)
} else {
GM_setValue(SUBREDDIT, disableCss)
}
}
if (GM_getValue(SUBREDDIT, DISABLE_CSS)) {
disableCss()
}
GM_registerMenuCommand('Toggle Custom CSS', toggle)