{"id":452,"date":"2020-01-01T00:00:00","date_gmt":"2020-01-01T00:00:00","guid":{"rendered":""},"modified":"2026-08-20T23:15:48","modified_gmt":"2026-08-20T21:15:48","slug":"x-11","status":"publish","type":"post","link":"https:\/\/blog-backend.znak.dev\/x-11\/","title":{"rendered":"x"},"content":{"rendered":"<blockquote class=\"wp-embedded-content\" data-secret=\"YQXKCAC5Qg\"><p><a href=\"https:\/\/www.znak.dev\/blog\/co-to-jest-klub-ksiazki-i-jak-go-zalozyc\/\">Co to jest klub ksi\u0105\u017cki i&nbsp;jak go za\u0142o\u017cy\u0107?<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" title=\"&#8222;Co to jest klub ksi\u0105\u017cki i&nbsp;jak go za\u0142o\u017cy\u0107?&#8221; &#8212; ZNAK Blog\" sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.znak.dev\/blog\/co-to-jest-klub-ksiazki-i-jak-go-zalozyc\/embed\/#?secret=YQXKCAC5Qg\" width=\"500\" height=\"282\" data-secret=\"YQXKCAC5Qg\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\/*! This file is auto-generated *\/!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&#038;&#038;(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&#038;&#038;(r=200),s.height=r):\"link\"===t.message&#038;&#038;(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&#038;&#038;n.host===r.host&#038;&#038;l.activeElement===s&#038;&#038;(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\/\/# sourceURL=https:\/\/www.znak.dev\/blog\/wp-includes\/js\/wp-embed.min.js<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Co to jest klub ksi\u0105\u017cki i&nbsp;jak go za\u0142o\u017cy\u0107?<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-452","post","type-post","status-publish","format-standard","hentry","category-nowosci"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>x - ZNAK Blog<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"x - ZNAK Blog\" \/>\n<meta property=\"og:description\" content=\"Co to jest klub ksi\u0105\u017cki i&nbsp;jak go za\u0142o\u017cy\u0107?\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.znak.dev\/blog\/x-11\/\" \/>\n<meta property=\"og:site_name\" content=\"ZNAK Blog\" \/>\n<meta property=\"article:published_time\" content=\"2020-01-01T00:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-20T21:15:48+00:00\" \/>\n<meta name=\"author\" content=\"michal.lausch@innovationsoftware.pl\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"michal.lausch@innovationsoftware.pl\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.znak.dev\/blog\/x-11\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.znak.dev\/blog\/x-11\/\"},\"author\":{\"name\":\"michal.lausch@innovationsoftware.pl\",\"@id\":\"https:\/\/blog-backend.znak.dev\/#\/schema\/person\/10ab0f40452227623fce4078ec9a38d1\"},\"headline\":\"x\",\"datePublished\":\"2020-01-01T00:00:00+00:00\",\"dateModified\":\"2026-08-20T21:15:48+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.znak.dev\/blog\/x-11\/\"},\"wordCount\":14,\"publisher\":{\"@id\":\"https:\/\/blog-backend.znak.dev\/#organization\"},\"articleSection\":[\"Nowo\u015bci\"],\"inLanguage\":\"pl-PL\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.znak.dev\/blog\/x-11\/\",\"url\":\"https:\/\/www.znak.dev\/blog\/x-11\/\",\"name\":\"x - ZNAK Blog\",\"isPartOf\":{\"@id\":\"https:\/\/blog-backend.znak.dev\/#website\"},\"datePublished\":\"2020-01-01T00:00:00+00:00\",\"dateModified\":\"2026-08-20T21:15:48+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.znak.dev\/blog\/x-11\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.znak.dev\/blog\/x-11\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.znak.dev\/blog\/x-11\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Strona g\u0142\u00f3wna\",\"item\":\"https:\/\/blog-backend.znak.dev\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"x\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blog-backend.znak.dev\/#website\",\"url\":\"https:\/\/blog-backend.znak.dev\/\",\"name\":\"ZNAK Blog\",\"description\":\"Znak blog\",\"publisher\":{\"@id\":\"https:\/\/blog-backend.znak.dev\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blog-backend.znak.dev\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/blog-backend.znak.dev\/#organization\",\"name\":\"ZNAK Blog\",\"url\":\"https:\/\/blog-backend.znak.dev\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/blog-backend.znak.dev\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/blog-backend.znak.dev\/wp-content\/uploads\/2025\/10\/znak_logo_black-1.svg\",\"contentUrl\":\"https:\/\/blog-backend.znak.dev\/wp-content\/uploads\/2025\/10\/znak_logo_black-1.svg\",\"width\":1,\"height\":1,\"caption\":\"ZNAK Blog\"},\"image\":{\"@id\":\"https:\/\/blog-backend.znak.dev\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/blog-backend.znak.dev\/#\/schema\/person\/10ab0f40452227623fce4078ec9a38d1\",\"name\":\"michal.lausch@innovationsoftware.pl\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/blog-backend.znak.dev\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/c20a999014106d7d672e991b9f973f37771aba2c8d95b4a80ce6ec558bba1fb8?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/c20a999014106d7d672e991b9f973f37771aba2c8d95b4a80ce6ec558bba1fb8?s=96&d=mm&r=g\",\"caption\":\"michal.lausch@innovationsoftware.pl\"},\"sameAs\":[\"https:\/\/znak.dev\/blog\"],\"url\":\"https:\/\/blog-backend.znak.dev\/author\/michal-lauschinnovationsoftware-pl\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"x - ZNAK Blog","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"pl_PL","og_type":"article","og_title":"x - ZNAK Blog","og_description":"Co to jest klub ksi\u0105\u017cki i&nbsp;jak go za\u0142o\u017cy\u0107?","og_url":"https:\/\/www.znak.dev\/blog\/x-11\/","og_site_name":"ZNAK Blog","article_published_time":"2020-01-01T00:00:00+00:00","article_modified_time":"2026-08-20T21:15:48+00:00","author":"michal.lausch@innovationsoftware.pl","twitter_card":"summary_large_image","twitter_misc":{"Napisane przez":"michal.lausch@innovationsoftware.pl"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.znak.dev\/blog\/x-11\/#article","isPartOf":{"@id":"https:\/\/www.znak.dev\/blog\/x-11\/"},"author":{"name":"michal.lausch@innovationsoftware.pl","@id":"https:\/\/blog-backend.znak.dev\/#\/schema\/person\/10ab0f40452227623fce4078ec9a38d1"},"headline":"x","datePublished":"2020-01-01T00:00:00+00:00","dateModified":"2026-08-20T21:15:48+00:00","mainEntityOfPage":{"@id":"https:\/\/www.znak.dev\/blog\/x-11\/"},"wordCount":14,"publisher":{"@id":"https:\/\/blog-backend.znak.dev\/#organization"},"articleSection":["Nowo\u015bci"],"inLanguage":"pl-PL"},{"@type":"WebPage","@id":"https:\/\/www.znak.dev\/blog\/x-11\/","url":"https:\/\/www.znak.dev\/blog\/x-11\/","name":"x - ZNAK Blog","isPartOf":{"@id":"https:\/\/blog-backend.znak.dev\/#website"},"datePublished":"2020-01-01T00:00:00+00:00","dateModified":"2026-08-20T21:15:48+00:00","breadcrumb":{"@id":"https:\/\/www.znak.dev\/blog\/x-11\/#breadcrumb"},"inLanguage":"pl-PL","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.znak.dev\/blog\/x-11\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.znak.dev\/blog\/x-11\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Strona g\u0142\u00f3wna","item":"https:\/\/blog-backend.znak.dev\/"},{"@type":"ListItem","position":2,"name":"x"}]},{"@type":"WebSite","@id":"https:\/\/blog-backend.znak.dev\/#website","url":"https:\/\/blog-backend.znak.dev\/","name":"ZNAK Blog","description":"Znak blog","publisher":{"@id":"https:\/\/blog-backend.znak.dev\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blog-backend.znak.dev\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"pl-PL"},{"@type":"Organization","@id":"https:\/\/blog-backend.znak.dev\/#organization","name":"ZNAK Blog","url":"https:\/\/blog-backend.znak.dev\/","logo":{"@type":"ImageObject","inLanguage":"pl-PL","@id":"https:\/\/blog-backend.znak.dev\/#\/schema\/logo\/image\/","url":"https:\/\/blog-backend.znak.dev\/wp-content\/uploads\/2025\/10\/znak_logo_black-1.svg","contentUrl":"https:\/\/blog-backend.znak.dev\/wp-content\/uploads\/2025\/10\/znak_logo_black-1.svg","width":1,"height":1,"caption":"ZNAK Blog"},"image":{"@id":"https:\/\/blog-backend.znak.dev\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/blog-backend.znak.dev\/#\/schema\/person\/10ab0f40452227623fce4078ec9a38d1","name":"michal.lausch@innovationsoftware.pl","image":{"@type":"ImageObject","inLanguage":"pl-PL","@id":"https:\/\/blog-backend.znak.dev\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/c20a999014106d7d672e991b9f973f37771aba2c8d95b4a80ce6ec558bba1fb8?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c20a999014106d7d672e991b9f973f37771aba2c8d95b4a80ce6ec558bba1fb8?s=96&d=mm&r=g","caption":"michal.lausch@innovationsoftware.pl"},"sameAs":["https:\/\/znak.dev\/blog"],"url":"https:\/\/blog-backend.znak.dev\/author\/michal-lauschinnovationsoftware-pl\/"}]}},"_links":{"self":[{"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/posts\/452","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/comments?post=452"}],"version-history":[{"count":1,"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/posts\/452\/revisions"}],"predecessor-version":[{"id":454,"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/posts\/452\/revisions\/454"}],"wp:attachment":[{"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/media?parent=452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/categories?post=452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog-backend.znak.dev\/wp-json\/wp\/v2\/tags?post=452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}