{"id":3538,"date":"2023-06-05T10:15:41","date_gmt":"2023-06-05T10:15:41","guid":{"rendered":"http:\/\/the-codest.localhost\/blog\/react-development-all-you-have-to-know\/"},"modified":"2026-03-05T10:39:03","modified_gmt":"2026-03-05T10:39:03","slug":"react-throun-allt-sem-thu-tharft-ad-vita","status":"publish","type":"post","link":"https:\/\/thecodest.co\/is\/blog\/react-development-all-you-have-to-know\/","title":{"rendered":"React \u00fer\u00f3un: allt sem \u00fe\u00fa \u00fearft a\u00f0 vita"},"content":{"rendered":"<p>Alhli\u00f0a inngangur a\u00f0 <a href=\"https:\/\/thecodest.co\/is\/blog\/conditional-component-visibility-in-react\/\">React<\/a> \u00der\u00f3un<\/p>\n<h2>Hva\u00f0 er React \u00fer\u00f3un?<\/h2>\n<p><a href=\"https:\/\/thecodest.co\/is\/blog\/hire-react-js-developer\/\">React.js<\/a>, einnig einfaldlega \u00feekkt sem <strong>React<\/strong>, er vins\u00e6ll <a href=\"https:\/\/thecodest.co\/is\/dictionary\/why-is-javascript-so-popular\/\">JavaScript<\/a> B\u00f3kasafn til a\u00f0 b\u00faa til notendavi\u00f0m\u00f3t. \u00der\u00f3a\u00f0 og vi\u00f0haldi\u00f0 af Facebook, React gerir hugb\u00fana\u00f0i kleift <a href=\"https:\/\/thecodest.co\/is\/blog\/team-extension-guide-software-development\/\">verkfr\u00e6\u00f0ingar<\/a> a\u00f0 b\u00faa til gagnvirkt, st\u00e6kkanlegt <a href=\"https:\/\/thecodest.co\/is\/blog\/find-your-ideal-stack-for-web-development\/\">vefur<\/a> forrit me\u00f0 au\u00f0veldum h\u00e6tti. \u00dea\u00f0 er s\u00e9rstaklega \u00feekkt fyrir sitt <strong>rafr\u00e6nn DOM<\/strong> eiginleiki sem b\u00e6tir afk\u00f6st vefums\u00f3kna verulega.<\/p>\n<h2>Yfirlit yfir React<\/h2>\n<h3>Saga React<\/h3>\n<p>Upphaf React \u00e1tti s\u00e9r sta\u00f0 hj\u00e1 Facebook. Me\u00f0 vaxandi kr\u00f6fum um efnis\u00feunga samf\u00e9lagsmi\u00f0la leitu\u00f0u verkfr\u00e6\u00f0ingar hj\u00e1 Facebook lei\u00f0a til a\u00f0 b\u00faa til b\u00f3kasafn sem myndi einfalda ferli\u00f0 vi\u00f0 a\u00f0 byggja fl\u00f3kin notendavi\u00f0m\u00f3t. Fyrsta innlei\u00f0ing React var \u00ed fr\u00e9ttavef Facebook \u00e1ri\u00f0 2011. \u00c1ri\u00f0 2013 var React gert opinn hugb\u00fana\u00f0ur, sem stu\u00f0la\u00f0i a\u00f0 virku <strong>React samf\u00e9lag<\/strong>.<\/p>\n<h3>\u00c1vinningur React<\/h3>\n<p><strong>React<\/strong> b\u00fd\u00f0ur forriturum upp \u00e1 fj\u00f6lda kosta. Helsti kosturinn er a\u00f0 geta b\u00fai\u00f0 til endurn\u00fdtanlega \u00edhluti, sem fl\u00fdtir fyrir <a href=\"https:\/\/thecodest.co\/is\/blog\/how-the-codests-team-extension-model-can-transform-your-in-house-development-team\/\">\u00fer\u00f3unarferli<\/a>. React innlei\u00f0ir einnig s\u00fdndar-DOM, sem eykur afk\u00f6st \u00fear sem ekki \u00fearf a\u00f0 hla\u00f0a s\u00ed\u00f0unni a\u00f0 n\u00fdju \u00feegar breytingar eru ger\u00f0ar.<\/p>\n<h2>React \u00edhlutir<\/h2>\n<p>\u00cd hjarta hvers React-forrits eru <strong>React \u00edhlutir<\/strong>. \u00cdhlutir eru byggingareiningar React-forrits. \u00deeir gera \u00fe\u00e9r kleift a\u00f0 b\u00faa til fl\u00f3kin notendavi\u00f0m\u00f3t \u00far litlum, einangru\u00f0um bitum af <a href=\"https:\/\/thecodest.co\/is\/dictionary\/what-is-code-refactoring\/\">k\u00f3\u00f0i<\/a>, e\u00f0a \u201c\u00fe\u00e6ttir\u201d. \u00cd React geta \u00fe\u00e6ttir veri\u00f0 anna\u00f0hvort fall\u00fe\u00e6ttir e\u00f0a flokks\u00fe\u00e6ttir.<\/p>\n<h2>R\u00edki og fylgihlutir<\/h2>\n<p><strong>R\u00edki<\/strong> og <strong>gr\u00e6jur<\/strong> eru grundvallarhugt\u00f6k \u00e1 svi\u00f0i React-\u00fer\u00f3unar. \u2018\u00c1standi\u00f0\u2019 v\u00edsar til innra <a href=\"https:\/\/thecodest.co\/is\/blog\/app-data-collection-security-risks-value-and-types-explored\/\">g\u00f6gn<\/a>, \u00e1 me\u00f0an \u2018props\u2019 (stytting \u00e1 properties) eru g\u00f6gn sem eru send fr\u00e1 foreldrisamhlutum til barnsamhluta.<\/p>\n<h2>JSX-setningafr\u00e6\u00f0i<\/h2>\n<p>React n\u00fdtir <strong>JSX<\/strong> (JavaScript XML), JavaScript-m\u00e1lfr\u00e6\u00f0ivi\u00f0b\u00f3t, til a\u00f0 l\u00fdsa \u00fev\u00ed hvernig notendavi\u00f0m\u00f3ti\u00f0 \u00e6tti a\u00f0 l\u00edta \u00fat. JSX framlei\u00f0ir React \u201c\u00fe\u00e6tti\u201d e\u00f0a uppsetningar eininga. \u00de\u00f3 ekki s\u00e9 nau\u00f0synlegt a\u00f0 nota JSX \u00ed React k\u00f3\u00f0a, er \u00fea\u00f0 mj\u00f6g m\u00e6lt me\u00f0 vegna l\u00e6sileika \u00feess og kunnugleika vi\u00f0 HTML.<\/p>\n<h2>React B\u00f3kas\u00f6fn og verkf\u00e6ri<\/h2>\n<p>React kemur me\u00f0 r\u00edku vistkerfi b\u00f3kasafna og verkf\u00e6ra sem eykur upplifun forritara. Helstu verkf\u00e6ri eru me\u00f0al annars <strong>React beinir<\/strong> til a\u00f0 sj\u00e1 um lei\u00f0s\u00f6gn, <strong>Endurtekning<\/strong> fyrir a\u00f0 stj\u00f3rna \u00e1standi forritsins, og <strong>Webpack<\/strong> fyrir a\u00f0 pakka JavaScript k\u00f3\u00f0a \u00ed eina skr\u00e1.<\/p>\n<h2>Pr\u00f3fun React-forrita<\/h2>\n<p>Pr\u00f3fun er mikilv\u00e6gur hluti af \u00fer\u00f3unarferlinu. A\u00f0 tryggja styrk \u00feinn <strong>React ums\u00f3kn<\/strong> m\u00e1 n\u00e1 fram me\u00f0 \u00fdmsum pr\u00f3funarb\u00f3kas\u00f6fnum og rammasetningum.<\/p>\n<h3>Einingapr\u00f3fanir me\u00f0 Jest<\/h3>\n<p>Jest er vins\u00e6lt pr\u00f3funart\u00e6ki \u00ed <strong>React<\/strong> samf\u00e9lag. \u00dea\u00f0 gerir \u00fe\u00e9r kleift a\u00f0 skrifa einingapr\u00f3f fyrir \u00edhluti \u00fe\u00edna \u00e1 au\u00f0veldan og skilvirkan h\u00e1tt, sem tryggir a\u00f0 \u00feeir virki eins og b\u00faist er vi\u00f0 \u00ed einangrun.<\/p>\n<h3>Heildst\u00e6\u00f0 pr\u00f3fun me\u00f0 Cypress<\/h3>\n<p>Til a\u00f0 pr\u00f3fa heildarfl\u00e6\u00f0i og notendaupplifun \u00fe\u00edna <strong>React forrit<\/strong>, End-til-enda pr\u00f3fun er nau\u00f0synleg. Cypress er \u00f6flugt t\u00f3l \u00ed \u00feessu skyni, sem hermir eftir raunverulegum notendavi\u00f0skiptum \u00ed vafranum.<\/p>\n<h2>Uppsetning React-forrita<\/h2>\n<p>\u00deegar \u00fe\u00fa hefur sm\u00ed\u00f0a\u00f0 og pr\u00f3fa\u00f0 React-forriti\u00f0 \u00feitt er n\u00e6sta skref a\u00f0 setja \u00fea\u00f0 \u00ed framkv\u00e6md.<\/p>\n<h3>H\u00fdsingarm\u00f6guleikar fyrir React-forrit<\/h3>\n<p>\u00dea\u00f0 eru fj\u00f6lmargar lei\u00f0ir til a\u00f0 h\u00fdsa React-forriti\u00f0 \u00feitt, \u00fear \u00e1 me\u00f0al hef\u00f0bundna vef\u00fej\u00f3na, sk\u00fdjami\u00f0a\u00f0a palla og jafnvel \u00fej\u00f3nustulausar n\u00e1lganir. R\u00e9tt val fer eftir s\u00e9rt\u00e6kum \u00fe\u00f6rfum og umfangi forritsins \u00fe\u00edns.<\/p>\n<h3>\u00datf\u00e6rslua\u00f0fer\u00f0ir fyrir React-forrit<\/h3>\n<p>Fer eftir h\u00fdsingarvalkostinum mun \u00fatf\u00e6rslua\u00f0fer\u00f0in breytast. Sumar vins\u00e6lar a\u00f0fer\u00f0ir eru bein FTP-upphle\u00f0sla, \u00fatf\u00e6rslur bygg\u00f0ar \u00e1 Git, <a href=\"https:\/\/thecodest.co\/is\/dictionary\/docker-developer\/\">Docker<\/a> \u00edl\u00e1tar og samfelld sam\u00fe\u00e6tting pipelines.<\/p>\n<h2>React vs \u00f6nnur rammas\u00f6fn<\/h2>\n<p>\u00dea\u00f0 er nau\u00f0synlegt a\u00f0 skilja hvernig React stendur sig \u00ed samanbur\u00f0i vi\u00f0 a\u00f0rar vins\u00e6lar JavaScript-b\u00f3kas\u00f6fn til a\u00f0 taka uppl\u00fdsta \u00e1kv\u00f6r\u00f0un \u00feegar \u00fe\u00fa velur t\u00e6knistakka \u00feinn.<\/p>\n<h3>Angular vs React<\/h3>\n<p><a href=\"https:\/\/thecodest.co\/is\/dictionary\/what-is-node-js-used-for-in-angular\/\">Einn tveggja p\u00f3sts 60 tonn<\/a> er full\u00fer\u00f3a\u00f0 MVC-rammi, \u00e1 me\u00f0an <strong>React<\/strong> er b\u00f3kasafn sem einbeitir s\u00e9r a\u00f0 \u00fer\u00f3un notendavi\u00f0m\u00f3ta. B\u00e1\u00f0ir hafa styrkleika; Angular b\u00fd\u00f0ur upp \u00e1 alhli\u00f0a lausn beint \u00far kassanum, \u00e1 me\u00f0an sveigjanleiki og einfaldleiki React eru kj\u00f6rnir af sumum forriturum.<\/p>\n<h3>Vue vs React<\/h3>\n<p><a href=\"https:\/\/thecodest.co\/is\/blog\/hire-vue-js-developers\/\">Vue<\/a>.js, eins og React, er b\u00f3kasafn til a\u00f0 b\u00faa til gagnvirk vefvi\u00f0m\u00f3t. B\u00e6\u00f0i hafa svipa\u00f0an afk\u00f6stapr\u00f3f\u00edl, en Vue er oft lofa\u00f0 fyrir einfaldleika sinn og au\u00f0veld sam\u00fe\u00e6tting.<\/p>\n<h2>\u00c1lyktun<\/h2>\n<p>React hefur \u00e1n efa haft veruleg \u00e1hrif \u00e1 heiminn af <a href=\"https:\/\/thecodest.co\/is\/dictionary\/what-is-full-stack-web-development\/\">vef\u00fer\u00f3un<\/a>, sem b\u00fd\u00f0ur forriturum upp \u00e1 lei\u00f0 til a\u00f0 byggja fl\u00f3kin og \u00f6flug notendavi\u00f0m\u00f3t me\u00f0 tilt\u00f6lulega litlum fyrirh\u00f6fn. \u00c1hersla \u00feess \u00e1 \u00edhluti, \u00e1samt traustu vistkerfi, gerir \u00fea\u00f0 a\u00f0 \u00f6flugum verkf\u00e6ri fyrir hvern vefforritara. Me\u00f0 vaxandi vins\u00e6ldum og virku samf\u00e9lagi er \u00fea\u00f0 a\u00f0 l\u00e6ra <strong>React<\/strong> er traust fj\u00e1rfesting fyrir hvern sem er a\u00f0 byrja e\u00f0a reyndan vefh\u00f6nnu\u00f0.<\/p>\n<p>A\u00f0 skilja hvernig \u00e1 a\u00f0 byggja, pr\u00f3fa og setja upp React-forrit getur veri\u00f0 st\u00edgssteinn til a\u00f0 b\u00faa til fl\u00f3knari forrit, sam\u00fe\u00e6tta vi\u00f0 \u00f6nnur b\u00f3kas\u00f6fn e\u00f0a jafnvel f\u00e6ra sig yfir \u00ed fars\u00edmaforritun. <a href=\"https:\/\/thecodest.co\/is\/blog\/tech-staff-augmentation-services-for-scaleups-enterprises-how-it-can-power-up-your-business-to-meet-your-business-needs\/\">forritager\u00f0<\/a> me\u00f0 <strong>React Innf\u00e6ddur<\/strong>. \u00deegar vefurinn heldur \u00e1fram a\u00f0 \u00fer\u00f3ast munu verkf\u00e6ri eins og React \u00e1fram m\u00f3ta landslagi\u00f0 yfir \u00fea\u00f0 sem er m\u00f6gulegt.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kynntu \u00fe\u00e9r hva\u00f0 React Development er og hvernig \u00fe\u00fa getur nota\u00f0 \u00fea\u00f0 til a\u00f0 b\u00faa til \u00f6flug forrit. Kynntu \u00fe\u00e9r kosti \u00feess a\u00f0 nota \u00feetta forritunarm\u00e1l og eiginleika \u00feess.<\/p>","protected":false},"author":2,"featured_media":3539,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-3538","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software-development"],"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 Development: All You Have to Know - The Codest<\/title>\n<meta name=\"description\" content=\"Find out what React Development is and how you can use it to create powerful applications. 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