// ==UserScript==
// @name YouTube EXPERIMENT_FLAGS Tamer
// @namespace UserScripts
// @match https://www.youtube.com/*
// @version 1.0.2
// @license MIT
// @author CY Fung
// @icon https://github.com/cyfung1031/userscript-supports/raw/main/icons/yt-engine.png
// @description Adjust EXPERIMENT_FLAGS
// @grant none
// @unwrap
// @run-at document-start
// @allFrames true
// @inject-into page
// ==/UserScript==
((__CONTEXT__) => {
// Purpose 1: Remove Obsolete Flags
// Purpose 2: Remove Flags bring no visual difference
// Purpose 3: Enable Flags bring performance boost
const DISABLE_CINEMATICS = false; // standard design
const NO_SerializedExperiment = true;
const KEEP_PLAYER_QUALITY_STICKY = true; // see https://greasyfork.org/scripts/471033/
const DISABLE_serializedExperimentIds = true;
const DISABLE_serializedExperimentFlags = true;
const IGNORE_VIDEO_SOURCE_RELATED = true;
const NO_REFRESH = true;
const ENABLE_MINOR_CHAT_FEATURE_UPGRADE = true;
const ENABLE_EMOJI_PICKER_NEW_STYLE = false;
const ENABLE_BADGE_STYLE = false;
const ENABLE_EXPERIMENT_FLAGS_MAINTAIN_STABLE_LIST = {
defaultValue: true, // performance boost
useExternal: () => typeof localStorage.EXPERIMENT_FLAGS_MAINTAIN_STABLE_LIST !== 'undefined',
externalValue: () => (+localStorage.EXPERIMENT_FLAGS_MAINTAIN_STABLE_LIST ? true : false)
};
const ENABLE_EXPERIMENT_FLAGS_MAINTAIN_REUSE_COMPONENTS = {
defaultValue: true, // not sure
useExternal: () => typeof localStorage.EXPERIMENT_FLAGS_MAINTAIN_REUSE_COMPONENTS !== 'undefined',
externalValue: () => (+localStorage.EXPERIMENT_FLAGS_MAINTAIN_REUSE_COMPONENTS ? true : false)
};
const ENABLE_EXPERIMENT_FLAGS_DEFER_DETACH = {
defaultValue: true, // not sure
useExternal: () => typeof localStorage.ENABLE_EXPERIMENT_FLAGS_DEFER_DETACH !== 'undefined',
externalValue: () => (+localStorage.ENABLE_EXPERIMENT_FLAGS_DEFER_DETACH ? true : false)
};
const ALLOW_ALL_LIVE_CHATS_FLAGS = false;
const USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET = false;
// TBC
// kevlar_tuner_should_always_use_device_pixel_ratio
// kevlar_tuner_should_clamp_device_pixel_ratio
// kevlar_tuner_clamp_device_pixel_ratio
// kevlar_tuner_should_use_thumbnail_factor
// kevlar_tuner_thumbnail_factor
// kevlar_tuner_min_thumbnail_quality
// kevlar_tuner_max_thumbnail_quality
// kevlar_tuner_should_test_visibility_time_between_jobs
// kevlar_tuner_visibility_time_between_jobs_ms
// kevlar_tuner_default_comments_delay
// kevlar_tuner_run_default_comments_delay
let settled = null;
// cinematic feature is no longer an experimential feature.
// It has been officially implemented.
// To disable cinematics, the user shall use other userscripts or just turn off the option in the video options.
const getSettingValue = (fm) => fm.useExternal() ? fm.externalValue() : fm.defaultValue;
const win = this instanceof Window ? this : window;
// Create a unique key for the script and check if it is already running
const hkey_script = 'jmimcvowrlzl';
if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
win[hkey_script] = true;
/** @type {globalThis.PromiseConstructor} */
const Promise = ((async () => { })()).constructor;
let isMainWindow = false;
let mzFlagDetected1 = new Set();
let mzFlagDetected2 = new Set();
let zPlayerKevlar = false;
try {
isMainWindow = window.document === window.top.document
} catch (e) { }
function fixSerializedExperiment(conf) {
const supportAV1 = window.MediaSource.isTypeSupported('video/webm; codecs=av01.0.05M.08');
const supportVP9 = window.MediaSource.isTypeSupported('video/webm; codecs=vp09.01.20.08.01.01.01.01.00');
if (DISABLE_serializedExperimentIds && typeof conf.serializedExperimentIds === 'string') {
let ids = conf.serializedExperimentIds.split(',');
let newIds = [];
for (const id of ids) {
let keep = false;
if (keep) {
newIds.push(id);
}
}
conf.serializedExperimentIds = newIds.join(',');
}
const mez = (mRes)=>{
mRes.set('html5_disable_low_pipeline', 'false');
mRes.set('html5_min_startup_buffered_ad_media_duration_secs', '0')
if (supportAV1 === false && localStorage['yt-player-av1-pref'] === '-1') {
mRes.set('html5_disable_av1', 'true');
mRes.set('html5_disable_av1_hdr', 'true');
mRes.set('html5_prefer_hbr_vp9_over_av1', 'true');
} else if (supportAV1 === true && supportVP9 === true && localStorage['yt-player-av1-pref'] === '8192') {
mRes.set('html5_disable_av1', 'false');
mRes.set('html5_disable_av1_hdr', 'false');
mRes.set('html5_prefer_hbr_vp9_over_av1', 'false');
}
// html5_perf_cap_override_sticky = true;
// html5_perserve_av1_perf_cap = true;
mRes.set('html5_enable_server_format_filter', 'true')
mRes.set('html5_use_ump', 'true')
mRes.set('html5_live_defrag_only_h264_playbacks', 'true')
mRes.set('html5_live_defrag_only_h264_formats', 'true')
mRes.set('html5_disable_protected_hdr', 'false')
mRes.set('html5_disable_vp9_encrypted', 'false')
mRes.set('html5_ignore_h264_framerate_cap', 'true')
mRes.set('html5_allow_asmjs', 'true')
mRes.set('html5_defer_modules_on_ads_only', 'true')
mRes.set('html5_use_drm_retry', 'true')
mRes.set('html5_delta_encode_fexp', 'true')
mRes.set('html5_only_send_cas_health_pings', 'true')
mRes.set('html5_modify_caption_vss_logging', 'true')
mRes.set('html5_allow_zero_duration_ads_on_timeline', 'true')
mRes.set('html5_reset_daistate_on_audio_codec_change', 'true')
mRes.set('html5_enable_safari_fairplay', 'true')
mRes.set('html5_safari_fairplay_ignore_hdcp', 'true')
mRes.set('html5_enable_vp9_fairplay', 'true')
mRes.set('html5_eme_loader_sync', 'true')
mRes.set('html5_enable_same_language_id_matching', 'true');
mRes.set('html5_enable_new_hvc_enc', 'true')
mRes.set('html5_enable_ssap', 'true')
mRes.set('html5_enable_short_gapless', 'true')
mRes.set('html5_enable_aac51', 'true')
mRes.set('html5_enable_ssap_entity_id', 'true')
mRes.set('html5_high_res_logging_always', 'true')
mRes.set('html5_local_playsinline', 'true')
mRes.set('html5_disable_media_element_loop_on_tv', 'true')
mRes.set('html5_native_audio_track_switching', 'true')
mRes.set('html5_format_hybridization', 'true')
mRes.set('html5_disable_encrypted_vp9_live_non_2k_4k', 'false')
mRes.set('html5_default_ad_gain', 'false')
mRes.set('html5_use_sabr_requests_for_debugging', 'false')
mRes.set('html5_enable_sabr_live_streaming_xhr', 'true')
mRes.set('html5_sabr_live_ultra_low_latency', 'true')
mRes.set('html5_sabr_live_low_latency', 'true')
mRes.set('html5_sabr_live', 'true')
mRes.set('html5_sabr_post_live', 'true')
mRes.set('html5_sabr_premiere', 'true')
mRes.set('html5_enable_sabr_live_streaming_xhr', 'true')
mRes.set('html5_enable_sabr_live_non_streaming_xhr', 'true')
mRes.set('html5_enable_subsegment_readahead_v3', 'true')
mRes.set('html5_ultra_low_latency_subsegment_readahead', 'true')
mRes.set('html5_disable_move_pssh_to_moov', 'true')
mRes.set('html5_modern_vp9_mime_type', 'true')
}
const qrz = (mRes)=>{
const res = [];
mRes.forEach((value, key) => {
res.push(`${key}=${value}`);
});
return res.join('&');
}
if (DISABLE_serializedExperimentFlags && typeof conf.serializedExperimentFlags === 'string') {
const fg = conf.serializedExperimentFlags;
const rx = /(^|&)(\w+)=([^=&|\s\{\}\[\]\(\)?]*)/g;
const mRes = new Map();
for (let m; m = rx.exec(fg);) {
let key = m[2];
let value = m[3];
let keep = false;
if (IGNORE_VIDEO_SOURCE_RELATED && key.indexOf('html5_') >= 0) {
if (key === 'html5_live_use_alternate_bandwidth_window_sizes') {
keep = true;
}
else if (key === 'html5_live_ultra_low_latency_bandwidth_window') {
keep = true;
}
else if (key === 'html5_live_low_latency_bandwidth_window') {
keep = true;
}
else if (key === 'html5_live_normal_latency_bandwidth_window') {
keep = true;
} else if (key === 'html5_skip_slow_ad_delay_ms') {
keep = true;
if (typeof value === 'string' && +value > 2) {
keep = true;
if (+value > 4) value = '4';
} else {
keep = false;
}
} else if (key === 'html5_player_preload_ad_fix') {
keep = true;
} else if (key.includes('_ad_') || key.includes('_ads_')) {
keep = false;
} else if (key === 'html5_ssdai_adfetch_dynamic_timeout_ms') {
keep = false;
} else if (key === 'html5_log_ssdai_fallback_ads' || key === 'html5_deprecate_adservice') {
keep = false;
} else {
if (!key.includes('deprecat')) keep = true;
}
} else if (IGNORE_VIDEO_SOURCE_RELATED && key.indexOf('h5_') >= 0) {
if (key.startsWith('enable_h5_player_ad_block_')) keep = false;
else if (key === 'fix_h5_toggle_button_a11y') keep = true;
else if (key === 'h5_companion_enable_adcpn_macro_substitution_for_click_pings') keep = false;
else if (key === 'h5_enable_generic_error_logging_event') keep = false;
else if (key === 'h5_enable_unified_csi_preroll') keep = true;
else if (key === 'h5_reset_cache_and_filter_before_update_masthead') keep = true;
else if (key === 'web_player_enable_premium_hbr_in_h5_api') keep = true;
else {
if (!key.includes('deprecat')) keep = true;
}
}
// if(key.includes('sticky')){
// console.log(5599,key)
// }
if (key.includes('_timeout') && typeof value === 'string') {
const valur = (value, k) => {
if (+value === 0) value = k;
else if (+value > +k) value = k;
return value;
}
if (key === 'check_navigator_accuracy_timeout_ms') {
value = valur(value, '4');
keep = true;
} else if (key === 'html5_ad_timeout_ms') {
value = valur(value, '4');
keep = true;
} else if (key === 'html5_ads_preroll_lock_timeout_delay_ms') {
// value = valur(value, '4');
// keep = true;
keep = false;
} else if (key === 'html5_slow_start_timeout_delay_ms') {
value = valur(value, '4');
keep = true;
} else if (key === 'variable_buffer_timeout_ms') {
// value = valur(value, '4');
// keep = true;
keep = false;
} else {
if (+value > 3000) value = '3000';
keep = true;
}
}
if (KEEP_PLAYER_QUALITY_STICKY && key.includes('_sticky')) {
if (key === 'html5_onesie_sticky_server_side') {
keep = false;
} else if (key === 'html5_perf_cap_override_sticky') {
keep = true;
} else if (key === 'html5_ustreamer_cap_override_sticky') {
keep = true;
} else if (key === 'html5_exponential_memory_for_sticky') {
keep = true;
} else {
keep = true;
}
}
if (key === 'html5_streaming_xhr_time_based_consolidation_ms') keep = true;
if (key === 'html5_bypass_contention_secs') keep = true;
if (key === 'vp9_drm_live') keep = true;
if (key === 'html5_log_rebuffer_reason') keep = false;
if (key === 'html5_enable_audio_track_log') keep = false;
if (key.startsWith('h5_expr_')) {
// by userscript
keep = true;
} else if (key.includes('deprecat')) {
keep = false;
}
if (key === 'html5_safari_desktop_eme_min_version') keep = true;
if (key === 'html5_disable_av1') keep = true;
if (key === 'html5_disable_av1_hdr') keep = true;
if (key === 'html5_disable_hfr_when_vp9_encrypted_2k4k_unsupported') keep = true;
if (key === 'html5_account_onesie_format_selection_during_format_filter') keep = true;
if (key === 'html5_prefer_hbr_vp9_over_av1') keep = true;
if (!DISABLE_CINEMATICS && key === 'web_cinematic_watch_settings') {
keep = true;
}
if (keep) mRes.set(key, value);
}
mez(mRes);
conf.serializedExperimentFlags = qrz(mRes);
}
}
const all_live_chat_flags = `live_chat_banner_expansion_fix
live_chat_enable_mod_view
live_chat_enable_qna_banner_overflow_menu_actions
live_chat_enable_qna_channel
live_chat_enable_send_button_in_slow_mode
live_chat_filter_emoji_suggestions
live_chat_increased_min_height
live_chat_over_playlist
live_chat_web_enable_command_handler
live_chat_web_use_emoji_manager_singleton
live_chat_whole_message_clickable`.trim().split(/\s+/)
const hLooper = ((fn) => {
let nativeFnLoaded = false;
let kc1 = 0;
const setIntervalW = setInterval;
const clearIntervalW = clearInterval;
let microDisconnectFn = null;
let fStopLooper = false;
const looperFn = () => {
if (fStopLooper) return;
let config_ = null;
let EXPERIMENT_FLAGS = null;
try {
config_ = yt.config_ || ytcfg.data_;
} catch (e) { }
if (!config_) return;
EXPERIMENT_FLAGS = config_.EXPERIMENT_FLAGS || 0;
if (EXPERIMENT_FLAGS) {
if (!settled) {
settled = {
use_maintain_stable_list: getSettingValue(ENABLE_EXPERIMENT_FLAGS_MAINTAIN_STABLE_LIST),
use_maintain_reuse_components: getSettingValue(ENABLE_EXPERIMENT_FLAGS_MAINTAIN_REUSE_COMPONENTS),
use_defer_detach: getSettingValue(ENABLE_EXPERIMENT_FLAGS_DEFER_DETACH),
}
if (settled.use_maintain_stable_list) Promise.resolve().then(() => console.debug("use_maintain_stable_list"));
if (settled.use_maintain_reuse_components) Promise.resolve().then(() => console.debug("use_maintain_reuse_components"));
if (settled.use_defer_detach) Promise.resolve().then(() => console.debug("use_defer_detach"));
}
fn(config_);
}
if (EXPERIMENT_FLAGS && microDisconnectFn) {
let isYtLoaded = false;
try {
isYtLoaded = typeof ytcfg.set === 'function';
} catch (e) { }
if (isYtLoaded) {
microDisconnectFn();
}
}
const playerKevlar = (config_.WEB_PLAYER_CONTEXT_CONFIGS || 0).WEB_PLAYER_CONTEXT_CONFIG_ID_KEVLAR_WATCH || 0;
if (playerKevlar && !zPlayerKevlar) {
zPlayerKevlar = true;
if (NO_SerializedExperiment && typeof playerKevlar.serializedExperimentFlags === 'string' && typeof playerKevlar.serializedExperimentIds === 'string') {
fixSerializedExperiment(playerKevlar);
}
}
};
const controller = {
start() {
kc1 = setIntervalW(looperFn, 1);
(async () => {
while (true && !nativeFnLoaded) {
looperFn();
if (fStopLooper) break;
await (new Promise(requestAnimationFrame));
}
})();
looperFn();
},
/**
*
* @param {Window} __CONTEXT__
*/
setupForCleanContext(__CONTEXT__) {
const { requestAnimationFrame, setInterval, clearInterval, setTimeout, clearTimeout } = __CONTEXT__;
(async () => {
while (true) {
looperFn();
if (fStopLooper) break;
await (new Promise(requestAnimationFrame));
}
})();
let kc2 = setInterval(looperFn, 1);
const marcoDisconnectFn = () => {
if (fStopLooper) return;
Promise.resolve().then(() => {
if (kc1 || kc2) {
kc1 && clearIntervalW(kc1); kc1 = 0;
kc2 && clearInterval(kc2); kc2 = 0;
looperFn();
}
fStopLooper = true;
});
document.removeEventListener('yt-page-data-fetched', marcoDisconnectFn, false);
document.removeEventListener('yt-navigate-finish', marcoDisconnectFn, false);
document.removeEventListener('spfdone', marcoDisconnectFn, false);
};
document.addEventListener('yt-page-data-fetched', marcoDisconnectFn, false);
document.addEventListener('yt-navigate-finish', marcoDisconnectFn, false);
document.addEventListener('spfdone', marcoDisconnectFn, false);
function onReady() {
if (!fStopLooper) {
setTimeout(() => {
!fStopLooper && marcoDisconnectFn();
}, 1000);
}
}
Promise.resolve().then(() => {
if (document.readyState !== 'loading') {
onReady();
} else {
window.addEventListener("DOMContentLoaded", onReady, false);
}
});
nativeFnLoaded = true;
microDisconnectFn = () => Promise.resolve(marcoDisconnectFn).then(setTimeout);
}
};
return controller;
})((config_) => {
if (!config_.EXPERIMENT_FLAGS) return;
const { use_maintain_stable_list, use_maintain_reuse_components, use_defer_detach } = settled;
// i don't know why it requires to be extracted function.
const mex = (EXPERIMENT_FLAGS, mzFlagDetected, fEntries) => {
for (const [key, value] of fEntries) {
if (value === true) {
// if(key.indexOf('modern')>=0 || key.indexOf('enable')>=0 || key.indexOf('theme')>=0 || key.indexOf('skip')>=0 || key.indexOf('ui')>=0 || key.indexOf('observer')>=0 || key.indexOf('polymer')>=0 )continue;
if (mzFlagDetected.has(key)) continue;
mzFlagDetected.add(key);
const kl = key.length;
const kl7 = kl % 7;
const kl5 = kl % 5;
const kl3 = kl % 3;
const kl2 = kl % 2;
if (!DISABLE_CINEMATICS) {
// web_watch_cinematics_disabled_by_default
// web_watch_cinematics_preferred_reduced_motion_default_disabled
if (key === 'kevlar_measure_ambient_mode_idle' || key === 'kevlar_watch_cinematics_invisible' || key === 'web_cinematic_theater_mode' || key === 'web_cinematic_fullscreen') {
continue;
}
let cineKey = key === 'enable_cinematic_blur_desktop_loading' ? 1
: key === 'kevlar_watch_cinematics' ? 2
: key === 'web_cinematic_masthead' ? 3
: key === 'web_watch_cinematics_preferred_reduced_motion_default_disabled' ? 4 : 0;
if (cineKey > 0) {
return;
}
}
if (key.indexOf('html5_') === 0) {
if (IGNORE_VIDEO_SOURCE_RELATED) {
continue;
}
// if(IGNORE_VIDEO_SOURCE_RELATED){
// if(key ==='html5_enable_vp9_fairplay') continue;
// if(key ==='html5_disable_av1_hdr') continue;
// if(key ==='html5_disable_hfr_when_vp9_encrypted_2k4k_unsupported') continue;
// if(key ==='html5_account_onesie_format_selection_during_format_filter') continue;
// if(key ==='html5_prefer_hbr_vp9_over_av1') continue;
// }
} else if (key.indexOf('kevlar_') === 0) {
if (kl7 === 2 && kl5 === 2 && kl2 === 1 && kl3 === 1) {
if (key === 'kevlar_rendererstamper_event_listener') continue; // https://github.com/cyfung1031/userscript-supports/issues/11
}
if (kl === 22) {
// kevlar_enable_up_arrow - no use
// kevlar_help_use_locale - might use
// kevlar_refresh_gesture - might use
// kevlar_smart_downloads - might use
// kevlar_thumbnail_fluid
// kevlar_ytb_live_badges
if (key === 'kevlar_ytb_live_badges') continue;
}
// if (!use_maintain_stable_list) {
if (key === 'kevlar_tuner_should_test_maintain_stable_list') continue;
if (key === 'kevlar_should_maintain_stable_list') continue;
if (key === 'kevlar_tuner_should_maintain_stable_list') continue; // fallback
// }
// if (!use_maintain_reuse_components) {
if (key === 'kevlar_tuner_should_test_reuse_components') continue;
if (key === 'kevlar_tuner_should_reuse_components') continue;
if (key === 'kevlar_should_reuse_components') continue; // fallback
// }
if (key === 'kevlar_tuner_should_defer_detach') continue;
if (kl7 === 5 && kl5 == 4 && kl2 === 1 && kl3 === 1) {
if (key === 'kevlar_system_icons') continue;
}
// if(key==='kevlar_prefetch_data_augments_network_data') continue;
if (kl7 === 6 && kl5 === 0 && kl3 === 2 && kl2 === 0) { // home page / watch page icons
if (key === 'kevlar_three_dot_ink') continue;
if (key === 'kevlar_use_wil_icons') continue;
if (key === 'kevlar_home_skeleton') continue;
}
if (kl7 === 4 && kl5 === 0 && kl3 === 1 && kl2 === 1) {
if (key === 'kevlar_fluid_touch_scroll') continue;
if (key === 'kevlar_watch_color_update') continue;
if (key === 'kevlar_use_vimio_behavior') continue; // home page - channel icon
}
if (kl3 === 2 && kl5 === 4 && kl2 < 2) { // collapsed meta
// no teaser, use latest collapsed meta design
if (key === 'kevlar_structured_description_content_inline') continue;
if (key === 'kevlar_watch_metadata_refresh') continue;
}
if (kl5 === 3 && kl3 === 1 && kl2 === 0) {
if (key === 'kevlar_watch_js_panel_height') continue; // affect Tabview Youtube
}
} else {
if (ALLOW_ALL_LIVE_CHATS_FLAGS && all_live_chat_flags.indexOf(key) >= 0) {
continue;
/*
*
live_chat_banner_expansion_fix
live_chat_enable_mod_view
live_chat_enable_qna_banner_overflow_menu_actions
live_chat_enable_qna_channel
live_chat_enable_send_button_in_slow_mode
live_chat_filter_emoji_suggestions
live_chat_increased_min_height
live_chat_over_playlist
live_chat_web_enable_command_handler
live_chat_web_use_emoji_manager_singleton
live_chat_whole_message_clickable
*/
}
if (kl7 === 1 && kl5 === 1 && kl2 === 0 && kl3 === 0) {
if (key === 'live_chat_web_enable_command_handler') continue;
}
if (kl7 === 1 && kl5 === 4 && kl3 === 2 && kl2 === 1) {
if (key === 'shorts_desktop_watch_while_p2') continue;
}
if (key === 'web_button_rework') continue;
if (kl7 === 3 && kl5 == 1 && kl2 === 1 && kl3 === 1) {
if (key === 'web_darker_dark_theme_live_chat') continue;
}
if (kl5 === 1 && kl3 === 0 && kl2 === 1 && kl7 === 0) {
if (key === 'web_darker_dark_theme') return; // it also affect cinemtaics
}
if (kl3 === 0 && kl5 === 2) { // modern menu
if (key === 'web_button_rework_with_live') continue;
if (key === 'web_fix_fine_scrubbing_drag') continue;
}
if (kl3 === 1 && kl5 === 4 && kl2 === 1) { // full screen -buggy
if (key === 'external_fullscreen') continue;
}
if (kl3 === 0 && kl5 === 3 && kl2 === 0) { // minimize menu
if (key === 'web_modern_buttons') continue;
if (key === 'web_modern_dialogs') continue;
}
if (kl3 === 1 && kl5 === 0 && kl7 === 5 && kl2 === 0) { // Tabview Youtube - multiline transcript
if (key === 'enable_mixed_direction_formatted_strings') continue;
}
if(key ==='enable_unknown_lact_fix_on_html5') continue;
}
if(key==='live_chat_chunk_across_update_interval') continue;
if (key === 'enable_native_live_chat_on_kevlar') continue;
if (key === 'live_chat_author_name_color_usernames') continue;
if (key === 'live_chat_seed_color_usernames') continue;
if (key === 'live_chat_colored_usernames') continue;
if (key === 'live_chat_simple_color_usernames') continue;
if (key === 'web_button_rework_with_live') continue;
if (key === 'live_chat_hide_avatars') continue;
if (key === 'live_chat_enable_qna_replay') continue;
if (key === 'live_chat_aggregation') continue;
if (key === 'live_chat_web_use_emoji_manager_singleton') continue;
if (key === 'enable_docked_chat_messages') continue;
if (key === 'live_chat_taller_emoji_picker') continue;
if (key === 'live_chat_emoji_picker_restyle') continue;
if (key === 'live_chat_emoji_picker_restyle_remain_open_on_send') continue;
if (key === 'live_chat_web_input_update') continue;
if (key === 'live_chat_enable_send_button_in_slow_mode') continue;
if (key === 'kevlar_watch_metadata_refresh_no_old_primary_data') continue;
if (key === 'kevlar_watch_metadata_refresh_no_old_secondary_data') continue;
if (key === 'enable_web_cosmetic_refresh_hashtag_page') continue;
if (key === 'kevlar_watch_metadata_refresh_description_lines') continue;
if(key==='enable_service_ajax_csn') continue;
if(key==='kevlar_use_vimio_behavior')continue;
if(key==='web_use_cache_for_image_fallback') continue;
if(key==='kevlar_woffle_fallback_image')continue;
if(key==='yt_img_shadow_trigger_show_on_visible') continue;
if(key==='kevlar_thumbnail_bg') continue;
if(key==='web_rounded_thumbnails')continue;
if(key==='kevlar_rendererstamper_event_listener') continue;
if(key==='dialog_behavior_no_tap_killswitch')continue;
if(key==='handle_service_request_actions') continue;
if(key === 'live_chat_whole_message_clickable') continue;
if(key === 'live_chat_require_space_for_autocomplete_emoji') continue;
if(key==='kevlar_keyboard_button_focus') continue;
if(key==='live_chat_emoji_picker_toggle_state')continue;
if(key==='super_sticker_emoji_picker_category_button_icon_filled')continue;
if(key==='enable_super_chat_buy_flow_revamp_web') continue;
if(key==='web_modern_buttons') continue;
if(key==='web_modern_dialogs') continue;
if(key==='live_chat_disable_chat_feed_animation') continue;
if(key==='live_chat_overflow_hide_chat') continue;
if(key==='web_darker_dark_theme_live_chat')continue;
if(key==='live_chat_channel_activity')continue;
if(key==='live_chat_emoji_picker_restyle_remain_open_on_click_to_input_area')continue;
if(key==='live_chat_top_chat_sampling_enabled') continue;
if(key==='live_chat_enable_mod_view')continue;
if(key==='live_chat_web_enable_command_handler_action_handling')continue;
if(key==='web_modern_dialogs')continue;
if(key==='web_modern_dialog_layout')continue;
if(key==='web_modern_typography')continue;
if(key==='kevlar_disable_component_resizing_support') continue;
if(key==='web_rounded_thumbnails') continue;
if(key==='enable_quiz_desktop_animation')continue;
if(key==='kevlar_thumbnail_fluid')continue;
if(key==='web_enable_playlist_video_lockup_equalizer')continue;
if(key==='web_modern_collections_v2') continue;
if(key==='animated_live_badge_icon') continue;
if(key==='use_color_palettes_modern_collections_v2') continue;
if(key==='web_amsterdam_post_mvp_playlists')continue;
if(key==='enable_desktop_search_bigger_thumbs')continue;
if(key==='web_animated_actions') continue;
if(key==='mweb_animated_actions') continue;
if(key==='enable_desktop_amsterdam_info_panels') continue;
if(key==='kevlar_modern_sd')continue;
if(key==='problem_walkthrough_sd')continue;
if(key==='polymer_video_renderer_defer_menu')continue;
if(key==='enable_html5_teal_ad_badge') continue;
if(key==='kevlar_ytb_live_badges') continue;
if(key==='live_chat_enable_new_moderator_badge') continue;
if(key==='live_chat_prepend_badges') continue;
if(key==='live_chat_bold_color_usernames') continue;
if(key==='render_custom_emojis_as_small_images') continue;
if(key==='web_enable_dynamic_metadata') continue;
// console.log(key)
EXPERIMENT_FLAGS[key] = false;
}
}
}
const mey = (EXPERIMENT_FLAGS, mzFlagDetected) => {
EXPERIMENT_FLAGS.defer_menus = true;
EXPERIMENT_FLAGS.defer_overlays = true;
EXPERIMENT_FLAGS.faster_load_overlay = true;
EXPERIMENT_FLAGS.disable_moving_thumbs_handling = true;
EXPERIMENT_FLAGS.polymer_video_renderer_defer_menu = true;
EXPERIMENT_FLAGS.web_announce_stop_seeing_this_ad_text_a11y_bugfix = true;
EXPERIMENT_FLAGS.disable_chips_intersection_observer = true;
EXPERIMENT_FLAGS.live_chat_top_chat_sampling_enabled = true;
EXPERIMENT_FLAGS.kevlar_dropdown_fix = true;
EXPERIMENT_FLAGS.debug_forward_web_query_parameters = false;
EXPERIMENT_FLAGS.cancel_pending_navs =true;
EXPERIMENT_FLAGS.web_no_lock_on_touchstart_killswitch = false;
// EXPERIMENT_FLAGS.live_chat_author_name_color_usernames = true;
// EXPERIMENT_FLAGS.live_chat_seed_color_usernames = true;
// EXPERIMENT_FLAGS.live_chat_colored_usernames = true;
// EXPERIMENT_FLAGS.live_chat_simple_color_usernames = true;
// live_chat_hide_avatars
if(ENABLE_MINOR_CHAT_FEATURE_UPGRADE){
// EXPERIMENT_FLAGS.mweb_wiz_skip_render = true;
// EXPERIMENT_FLAGS.kevlar_wiz_prototype_enable_all_components= true;
// EXPERIMENT_FLAGS.kevlar_wiz_enable_on_demand_alternative_components= true;
EXPERIMENT_FLAGS.web_enable_dynamic_metadata = true;
EXPERIMENT_FLAGS.web_supports_animations_api = true;
EXPERIMENT_FLAGS.smartimation_background = true;
EXPERIMENT_FLAGS.register_web_smartimations_component = true;
EXPERIMENT_FLAGS.enable_native_live_chat_on_kevlar = true;
EXPERIMENT_FLAGS.live_chat_enable_qna_replay = true;
EXPERIMENT_FLAGS.live_chat_aggregation = true;
EXPERIMENT_FLAGS.live_chat_web_use_emoji_manager_singleton = true;
// EXPERIMENT_FLAGS.enable_docked_chat_messages = true;
EXPERIMENT_FLAGS.live_chat_mention_regex_update = true;
}
// EXPERIMENT_FLAGS.live_chat_taller_emoji_picker = true;
// EXPERIMENT_FLAGS.live_chat_web_input_update = true;
if(ENABLE_EMOJI_PICKER_NEW_STYLE){
EXPERIMENT_FLAGS.live_chat_emoji_picker_restyle = true;
EXPERIMENT_FLAGS.live_chat_emoji_picker_restyle_remain_open_on_send = true;
EXPERIMENT_FLAGS.live_chat_taller_emoji_picker = false;
}
if(ENABLE_BADGE_STYLE) {
EXPERIMENT_FLAGS.enable_html5_teal_ad_badge = true;
EXPERIMENT_FLAGS.kevlar_ytb_live_badges = true;
EXPERIMENT_FLAGS.live_chat_enable_new_moderator_badge = true;
EXPERIMENT_FLAGS.live_chat_prepend_badges=true;
EXPERIMENT_FLAGS.live_chat_bold_color_usernames =true;
EXPERIMENT_FLAGS.render_custom_emojis_as_small_images =true;
}
// EXPERIMENT_FLAGS.kevlar_wiz_prototype_enable_all_components = true;
EXPERIMENT_FLAGS.html5_allow_asmjs = true;
EXPERIMENT_FLAGS.html5_honor_caption_availabilities_in_audio_track = true;
EXPERIMENT_FLAGS.web_player_hide_nitrate_promo_tooltip = true;
EXPERIMENT_FLAGS.html5_enable_vod_slar_with_notify_pacf = true;
EXPERIMENT_FLAGS.html5_recognize_predict_start_cue_point = true;
EXPERIMENT_FLAGS.enable_player_logging_lr_home_infeed_ads = false;
EXPERIMENT_FLAGS.log_gel_compression_latency = true;
EXPERIMENT_FLAGS.log_gel_compression_latency_lr = true;
EXPERIMENT_FLAGS.log_jspb_serialize_latency = true;
if (NO_REFRESH) {
EXPERIMENT_FLAGS.kevlar_watch_metadata_refresh_standardized_body_typography = false;
EXPERIMENT_FLAGS.kevlar_refresh_gesture = false;
}
// EXPERIMENT_FLAGS.kevlar_watch_metadata_refresh_no_old_primary_data = true;
// EXPERIMENT_FLAGS.kevlar_watch_metadata_refresh_no_old_secondary_data = true;
// EXPERIMENT_FLAGS.enable_web_cosmetic_refresh_hashtag_page = true;
// EXPERIMENT_FLAGS.kevlar_watch_metadata_refresh_description_lines = true;
EXPERIMENT_FLAGS.desktop_delay_player_resizing = false;
EXPERIMENT_FLAGS.web_animated_like = false;
EXPERIMENT_FLAGS.web_animated_like_lazy_load = false;
if (use_maintain_stable_list) {
if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
EXPERIMENT_FLAGS.kevlar_tuner_should_maintain_stable_list = true; // fallback
}
}
if (use_maintain_reuse_components) {
EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
EXPERIMENT_FLAGS.kevlar_should_reuse_components = true; // fallback
}
if (use_defer_detach) {
EXPERIMENT_FLAGS.kevlar_tuner_should_defer_detach = true;
}
// EXPERIMENT_FLAGS.kevlar_prefetch_data_augments_network_data = true; // TBC
EXPERIMENT_FLAGS.kevlar_clear_non_displayable_url_params = true;
EXPERIMENT_FLAGS.kevlar_clear_duplicate_pref_cookie = true;
// EXPERIMENT_FLAGS.kevlar_unified_player_clear_watch_next_killswitch = true;
EXPERIMENT_FLAGS.kevlar_player_playlist_use_local_index = true;
// EXPERIMENT_FLAGS.kevlar_non_watch_unified_player = true;
// EXPERIMENT_FLAGS.kevlar_player_update_killswitch = true;
EXPERIMENT_FLAGS.web_secure_pref_cookie_killswitch = true;
EXPERIMENT_FLAGS.ytidb_clear_optimizations_killswitch = true;
// EXPERIMENT_FLAGS.defer_overlays = true;
}
const setterFn = (EXPERIMENT_FLAGS, mzFlagDetected) => {
const fEntries = Object.entries(EXPERIMENT_FLAGS);
mex(EXPERIMENT_FLAGS, mzFlagDetected, fEntries);
mey(EXPERIMENT_FLAGS, mzFlagDetected);
};
setterFn(config_.EXPERIMENT_FLAGS, mzFlagDetected1);
if (config_.EXPERIMENTS_FORCED_FLAGS) setterFn(config_.EXPERIMENTS_FORCED_FLAGS, mzFlagDetected2);
});
hLooper.start();
const cleanContext = async (win) => {
const waitFn = requestAnimationFrame; // shall have been binded to window
try {
let mx = 16; // MAX TRIAL
const frameId = 'vanillajs-iframe-v1'
let frame = document.getElementById(frameId);
let removeIframeFn = null;
if (!frame) {
frame = document.createElement('iframe');
frame.id = 'vanillajs-iframe-v1';
frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
n.appendChild(frame);
while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
const root = document.documentElement;
root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
removeIframeFn = (setTimeout) => {
const removeIframeOnDocumentReady = (e) => {
e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
win = null;
setTimeout(() => {
n.remove();
n = null;
}, 200);
}
if (document.readyState !== 'loading') {
removeIframeOnDocumentReady();
} else {
win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
}
}
}
while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
const fc = frame.contentWindow;
if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
const { requestAnimationFrame, setInterval, setTimeout, clearInterval, clearTimeout } = fc;
const res = { requestAnimationFrame, setInterval, setTimeout, clearInterval, clearTimeout };
for (let k in res) res[k] = res[k].bind(win); // necessary
if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
return res;
} catch (e) {
console.warn(e);
return null;
}
};
cleanContext(win).then(__CONTEXT__ => {
const { requestAnimationFrame, setInterval, clearInterval, setTimeout, clearTimeout } = __CONTEXT__;
hLooper.setupForCleanContext(__CONTEXT__)
});
if (isMainWindow) {
console.groupCollapsed(
"%cYouTube EXPERIMENT_FLAGS Tamer",
"background-color: #EDE43B ; color: #000 ; font-weight: bold ; padding: 4px ;"
);
console.log("Script is loaded.");
console.log("This might affect the new features when YouTube rolls them out to general users.");
console.log("If you found any issue in using YouTube, please disable this script to check whether the issue is due to this script or not.");
console.groupEnd();
}
})(null);
