{"id":6643,"date":"2026-04-13T11:50:53","date_gmt":"2026-04-13T11:50:53","guid":{"rendered":"http:\/\/the-codest.localhost\/dictionary\/react\/"},"modified":"2026-04-13T11:50:53","modified_gmt":"2026-04-13T11:50:53","slug":"reagere","status":"publish","type":"dictionary","link":"https:\/\/thecodest.co\/da\/dictionary\/react\/","title":{"rendered":"React"},"content":{"rendered":"<h1>React: En omfattende definition<\/h1>\n<p><a href=\"https:\/\/thecodest.co\/da\/blog\/conditional-component-visibility-in-react\/\">React<\/a> er en popul\u00e6r open source <a href=\"https:\/\/thecodest.co\/da\/blog\/hire-javascript-developer\/\">JavaScript<\/a> bibliotek, der bruges til at bygge brugergr\u00e6nseflader (UI'er). Det blev udviklet af Facebook og vedligeholdes nu af et f\u00e6llesskab af udviklere. React er kendt for sin evne til at skabe dynamiske og responsive brugergr\u00e6nseflader med minimal kodning. Det bruges i vid udstr\u00e6kning til at bygge <a href=\"https:\/\/thecodest.co\/da\/blog\/find-your-ideal-stack-for-web-development\/\">web<\/a> applikationer, mobilapplikationer og endda desktop-applikationer.<\/p>\n<p>React er baseret p\u00e5 konceptet med komponenter. En komponent er en selvst\u00e6ndig blok af <a href=\"https:\/\/thecodest.co\/da\/dictionary\/what-is-code-refactoring\/\">Kode<\/a> der kan genbruges i hele applikationen. Det kan betragtes som en byggesten, der kan kombineres med andre komponenter for at skabe en komplet brugergr\u00e6nseflade. <a href=\"https:\/\/thecodest.co\/da\/blog\/react-development-all-you-have-to-know\/\">React-komponenter<\/a> er bygget ved hj\u00e6lp af en kombination af HTML-lignende syntaks kaldet JSX og JavaScript.<\/p>\n<p>En af de vigtigste funktioner i React er dens virtuelle DOM (Document Object Model). Den virtuelle DOM er en letv\u00e6gtsrepr\u00e6sentation af den faktiske DOM. N\u00e5r der foretages en \u00e6ndring i en komponent, opdaterer React den virtuelle DOM i stedet for den faktiske DOM. Det g\u00f8r det muligt for React effektivt at afg\u00f8re, hvilke \u00e6ndringer der skal foretages i brugergr\u00e6nsefladen, og kun opdatere de dele af brugergr\u00e6nsefladen. Det resulterer i hurtigere rendering og en mere j\u00e6vn brugeroplevelse.<\/p>\n<p>React er ogs\u00e5 kendt for sin ensrettede <a href=\"https:\/\/thecodest.co\/da\/blog\/app-data-collection-security-risks-value-and-types-explored\/\">data<\/a> flow. I React flyder data i \u00e9n retning, fra overordnede komponenter til underordnede komponenter. Det g\u00f8r det lettere at administrere data og sikrer, at brugergr\u00e6nsefladen altid er opdateret.<\/p>\n<p>React kan i h\u00f8j grad tilpasses og bruges sammen med andre biblioteker og frameworks. Det kan bruges med popul\u00e6re front-end frameworks som f.eks. <a href=\"https:\/\/thecodest.co\/da\/blog\/hire-angular-js-developer\/\">Angular<\/a> og <a href=\"https:\/\/thecodest.co\/da\/blog\/hire-vue-js-developers\/\">Vue<\/a>.js. Det kan ogs\u00e5 bruges med back-end-frameworks som f.eks. <a href=\"https:\/\/thecodest.co\/da\/blog\/find-your-node-js-expert-for-hire-today\/\">Node.js<\/a>.<\/p>\n<p>React har et stort og aktivt f\u00e6llesskab af udviklere, som bidrager til udviklingen og yder st\u00f8tte til andre udviklere. Der er mange ressourcer til r\u00e5dighed til at l\u00e6re React, herunder dokumentation, vejledninger og onlinekurser.<\/p>\n<p>Konklusionen er, at React er et st\u00e6rkt og fleksibelt JavaScript-bibliotek, der bruges til at opbygge dynamiske og responsive brugergr\u00e6nseflader. Dets komponentbaserede arkitektur, virtuelle DOM og ensrettede dataflow g\u00f8r det til et ideelt valg til opbygning af komplekse applikationer. Dets popularitet og aktive f\u00e6llesskab g\u00f8r det til et v\u00e6rdifuldt v\u00e6rkt\u00f8j for enhver udvikler, der \u00f8nsker at bygge moderne webapplikationer.<\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e6r om React, det popul\u00e6re open source JavaScript-bibliotek, der bruges til at bygge dynamiske og responsive brugergr\u00e6nseflader med minimal kodning.<\/p>","protected":false},"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-6643","dictionary","type-dictionary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>React - The Codest<\/title>\n<meta name=\"description\" content=\"Learn about React, the popular open-source JavaScript library used for building dynamic and responsive user interfaces with minimal coding.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thecodest.co\/da\/ordbog\/reagere\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"React\" \/>\n<meta property=\"og:description\" content=\"Learn about React, the popular open-source JavaScript library used for building dynamic and responsive user interfaces with minimal coding.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thecodest.co\/da\/ordbog\/reagere\/\" \/>\n<meta property=\"og:site_name\" content=\"The Codest\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thecodest.co\/app\/uploads\/2024\/06\/cover-image.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/react\\\/\",\"url\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/react\\\/\",\"name\":\"React - 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