{"id":154084,"date":"2026-01-18T17:11:55","date_gmt":"2026-01-18T15:11:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-javascript-biblioteki-jquery-4-0-2"},"modified":"2026-01-18T17:11:55","modified_gmt":"2026-01-18T15:11:55","slug":"vypusk-javascript-biblioteki-jquery-4-0-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-javascript-biblioteki-jquery-4-0-2","title":{"rendered":"Vyd\u00e1n\u00ed JavaScript knihovny jQuery 4.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po t\u00e9m\u011b\u0159 10 letech od vyd\u00e1n\u00ed verze 3.0 a 20 let od zalo\u017een\u00ed projektu byla vyd\u00e1na knihovna JavaScriptu jQuery 4.0, kter\u00e1 podle \u00fadaj\u016f organizace W3Techs pou\u017e\u00edv\u00e1 70,9 % z 10 milion\u016f nejnav\u0161t\u011bvovan\u011bj\u0161\u00edch webov\u00fdch str\u00e1nek. K\u00f3d jQuery je \u0161\u00ed\u0159en pod licenc\u00ed MIT.       <\/p>\n<p> Verze jQuery 4.0 obsahuje zm\u011bny, kter\u00e9 naru\u0161uj\u00ed zp\u011btnou kompatibilitu, av\u0161ak podle uji\u0161t\u011bn\u00ed v\u00fdvoj\u00e1\u0159\u016f v\u011bt\u0161ina u\u017eivatel\u016f bude moci p\u0159ej\u00edt na novou verzi bez v\u011bt\u0161\u00edch obt\u00ed\u017e\u00ed s minim\u00e1ln\u00edmi zm\u011bnami ve sv\u00e9m k\u00f3du. Pro usnadn\u011bn\u00ed migrace lze pou\u017e\u00edt speci\u00e1ln\u00ed plugin. Problematick\u00e9 oblasti zp\u011btn\u00e9 kompatibility jsou spojeny s odstran\u011bn\u00edm zastaral\u00e9ho k\u00f3du, odstran\u011bn\u00edm n\u011bkter\u00fdch intern\u00edch nedokumentovan\u00fdch parametr\u016f, zastaven\u00edm podpory n\u011bkter\u00e9ho p\u0159\u00edli\u0161 slo\u017eit\u00e9ho chov\u00e1n\u00ed a zastaven\u00edm podpory API, kter\u00e9 byly d\u0159\u00edve ozna\u010deny jako zastaral\u00e9. Odstran\u011bn\u00ed zastaral\u00fdch API a prohl\u00ed\u017ee\u010d\u016f umo\u017enilo zmen\u0161it velikost gzip archivu s knihovnou o 3 KB (slim verze nyn\u00ed zab\u00edr\u00e1 19,5 KB, zat\u00edmco pln\u00e1 - 27,5 KB).       <\/p>\n<p>Mezi zm\u011bnami:  <\/p>\n<ul>\n<li class=\"l\"> Byla ukon\u010dena podpora prohl\u00ed\u017ee\u010de IE 10 a star\u0161\u00edch verz\u00ed (podpora IE 11 byla zachov\u00e1na, ale bude odstran\u011bna ve verzi Query 5.0) a tak\u00e9 pro dal\u0161\u00ed star\u00e9 prohl\u00ed\u017ee\u010de, jako jsou Edge Legacy, Android Browser a Firefox do verze 115.\n<li class=\"l\"> Byla implementov\u00e1na podpora API Trusted Types, kter\u00e9 se vyv\u00edj\u00ed pro ochranu proti manipulaci s DOM vedouc\u00ed k meziwebov\u00e9mu skriptov\u00e1n\u00ed (DOM XSS), nap\u0159\u00edklad p\u0159i nespr\u00e1vn\u00e9m zpracov\u00e1n\u00ed dat od u\u017eivatel\u016f v bloc\u00edch eval() nebo p\u0159i vkl\u00e1d\u00e1n\u00ed .innerHTML, co\u017e m\u016f\u017ee v\u00e9st k prov\u00e1d\u011bn\u00ed JavaScriptov\u00e9ho k\u00f3du v kontextu ur\u010dit\u00e9 str\u00e1nky. Do metod jQuery nyn\u00ed m\u016f\u017ee b\u00fdt p\u0159ed\u00e1v\u00e1n HTML k\u00f3d ve form\u011b objekt\u016f TrustedHTML.\n<li class=\"l\"> K\u00f3d jQuery byl p\u0159eveden na pou\u017e\u00edv\u00e1n\u00ed JavaScriptov\u00fdch modul\u016f ESM (ECMAScript Module) a m\u016f\u017ee b\u00fdt dod\u00e1v\u00e1n a importov\u00e1n jako modul.\n<li class=\"l\"> Byly odstran\u011bny funkce, kter\u00e9 byly d\u0159\u00edve ozna\u010deny jako zastaral\u00e9: jQuery.isArray, jQuery.parseJSON, jQuery.trim, jQuery.type, jQuery.now, jQuery.isNumeric, jQuery.isFunction, jQuery.isWindow, jQuery.camelCase, jQuery.nodeName, jQuery.cssNumber, jQuery.cssProps a jQuery.fx.interval. M\u00edsto t\u011bchto funkc\u00ed se doporu\u010duje pou\u017e\u00edvat nativn\u00ed JavaScriptov\u00e9 funkce Array.isArray(), JSON.parse(), String.prototype.trim() a Date.now()\n<li class=\"l\"> Byly odstran\u011bny nedokumentovan\u00e9 intern\u00ed metody objektu Array - push, sort a splice.\n<li class=\"l\"> Po\u0159ad\u00ed zpracov\u00e1n\u00ed ud\u00e1lost\u00ed zm\u011bny fokusu bylo slad\u011bno se specifikac\u00ed W3C - blur, focusout, focus a focusin.\n<li class=\"l\"> Velikost zkr\u00e1cen\u00e9 varianty (slim), kter\u00e1 neobsahuje moduly ajax a effects, byla zkr\u00e1cena na 19,5 kB d\u00edky ukon\u010den\u00ed dod\u00e1vky objekt\u016f Deferred (doporu\u010duje se pou\u017e\u00edvat standardn\u00ed Promises) a Callbacks.  <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64637\">opennet.ru<\/a> 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