Issue #3414398 by catch, Berdir: AssetResolver::getJsAssets() and AssetResolver::getCssAssets()  can repeatedly try to calculate the same set of assets

Issue #3437839 by catch, Luke.Leber, thejimbirch: Only send libraries with aggregate URLs that have the aggregate type included

Issue #3348789 by catch, Altcom_Neil, markie, lauriii, pelicani, longwave, olli: Compress ajax_page_state

Issue #2032967 by catch, joelpittet, thedavidmeister, alansaviolobo: AssetResolver::getCssAssets() should not try to sort and optimise if $css is empty

Issue #3370930 by catch, Amber Himes Matz, kevinquillen, mherchel: Aggregation URL hashes should be built from normalized list of libraries

Issue #3222107 by codebymikey, bnjmnm, chandu7929, Shubham Chandra, jmickela, vipin.mittal18, trickfun, larowlan: Library order asset weights do not work properly when a large number of javascript files is loaded between two jQuery UI libraries

Issue #3328454 by xjm, Bhanu951, jidrone, smustgrave: Replace most strpos() !== FALSE or === FALSE with str_contains()

Issue #2258313 by Wim Leers, nod_, ravi.shankar, lauriii, catch, mfb, longwave, corbacho, alexpott, sun, Owen Barton, tstoeckler: Add license information to aggregated assets

Issue #1014086 by catch, nod_, martin107, quietone, dww, mariacha1, Spokje, yogeshmpawar, pounard, Wim Leers, mfer, mikeytown2, mbutcher, moshe weitzman, Fabianx, borisson_, alexpott, donquixote, sun, andypost, dawehner: Stampedes and cold cache performance issues with css/js aggregation

Issue #2647778 by ranjith_kumar_k_u, NickDickinsonWilde, Rakhi Soni, smustgrave, jhodgdon: AssetResolver::sort() param documentation improvements

Issue #2616814 by dpi, Xano, geek-merlin, Hardik_Patel_12, jofitz, alexpott, Fabianx, catch, joachim, andypost, dawehner, daffie, cweagans, neclimdul: Delegate all hook invocations to ModuleHandler

Issue #3222769 by bbrala, alexpott, longwave, Matroskeen: [November 8, 2021] Replace all list (array destructuring) assignment to the array syntax

Issue #2937513 by eltori, longwave, klausi, catch, idebr: Fix 'Drupal.Commenting.DocComment.TagGroupSpacing' coding standard

Issue #2902412 by Jo Fitzgerald, andypost, mfernea, andriyun: Fix 'Drupal.Strings.UnnecessaryStringConcat' coding standard

Issue #2909368 by mfernea, reflie, zaporylie: Fix 'Drupal.Commenting.VariableComment.InlineVariableName' coding standard

Issue #2647916 by Lendude, Wim Leers, dawehner: Views ajax modals stop working in certain scenarios: due to JS settings caching, AJAX responses may set wrong ajaxPageState.libraries, causing problems for subsequent AJAX requests/responses

Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2603138 by catch, Wim Leers, tim.plunkett, chx, Fabianx, effulgentsia: CSS/JS asset caching can easily be trashed

Issue #2597359 by Wim Leers: Require responses with attachments to contain the final attachment values

Issue #2451411 by almaudoh, Shamsher_Alam, lauriii, borisson_, cilefen, davidhernandez, Cottser, Wim Leers, joelpittet: Add libraries-override to themes' *.info.yml

Issue #977844 by Wim Leers: Remove the 'every_page' option for CSS/JS assets: it is confusing, even damaging

Issue #2538274 by pwolanin, Wim Leers, dawehner: DbUpdateController has broken mainteneance mode logic, and update.php doesn't run due to aggregated JS assets

Issue #2389735 by lauriii, iMiksu, davidhernandez, larowlan, loopduplicate, LewisNyman, Wim Leers, dawehner, Cottser: Core and base theme CSS files in libraries override theme CSS files with the same name

Issue #784626 by Wim Leers, Manuel Garcia, jcisio, joelpittet, Bevan, fcaspani, dcmouyard: Default all JS to the footer, allow asset libraries to force their JS to the header

Issue #2368797 by Wim Leers, dawehner, rteijeiro: Optimize ajaxPageState to keep Drupal 8 sites fast on high-latency networks, prevent CSS/JS aggregation from taking down sites and use HTTP GET for AJAX requests