{"id":50200,"date":"2023-04-24T07:40:40","date_gmt":"2023-04-24T06:40:40","guid":{"rendered":"https:\/\/kinqsta.com\/dk\/?p=50200&post_type=knowledgebase&preview_id=50200"},"modified":"2025-10-01T20:02:58","modified_gmt":"2025-10-01T19:02:58","slug":"uncaught-typeerror-is-not-a-function","status":"publish","type":"post","link":"https:\/\/kinqsta.com\/dk\/blog\/uncaught-typeerror-is-not-a-function\/","title":{"rendered":"S\u00e5dan l\u00f8ser du fejlen “Uncaught TypeError: $ Is Not a Function”"},"content":{"rendered":"

WordPress underst\u00f8tter JavaScript<\/a> og jQuery-biblioteket<\/a> fuldt ud. Den m\u00e5de, som WordPress implementerer jQuery p\u00e5, kan dog f\u00f8re til fejl, n\u00e5r du fors\u00f8ger at udf\u00f8re funktioner. Et af de mest almindelige problemer er fejlen “Uncaught TypeError: $ is not a function”.<\/p>\n

Fejlfinding af denne fejl er relativt enkel, hvis du forst\u00e5r, hvad der for\u00e5rsager den. “$”-aliaset er kernen i problemet, og jQuery og WordPress tilbyder flere m\u00e5der at omg\u00e5 det p\u00e5, s\u00e5 du kan k\u00f8re de funktioner, du har brug for.<\/p>\n

I denne artikel vil vi forklare, hvad fejlen “Uncaught TypeError: $ is not a function” er, og hvad der for\u00e5rsager den. Derefter vil vi ogs\u00e5 vise dig, hvordan du kan l\u00f8se den. Lad os komme i gang!
\n

<\/div><\/kinsta-auto-toc><\/p>\n

Hvad er “Uncaught TypeError: $ Is Not a Function”-fejlen i WordPress?<\/h2>\n

Fejlen “Uncaught TypeError: $ is not a function” er en almindelig JavaScript-fejl<\/a>, der opst\u00e5r, n\u00e5r jQuery-biblioteket ikke er indl\u00e6st korrekt, eller der er en konflikt med andre scripts, der bruger ‘$’-symbolet.<\/p>\n

I WordPress har denne fejl mere at g\u00f8re med, hvordan Content Management System (CMS)<\/a> implementerer jQuery og mindre med problemer med indl\u00e6sning<\/a>.<\/p>\n

jQuery er et popul\u00e6rt JavaScript-bibliotek<\/a>. Det bruges i vid udstr\u00e6kning i WordPress-temaer og plugins til h\u00e5ndtering af forskellige dynamiske elementer, animationer og AJAX-operationer:<\/p>\n

\"jQuery-bibliotek
jQuery-bibliotek<\/figcaption><\/figure>\n

I jQuery er “$”-symbolet et alias for jQuery-objektet, som er det prim\u00e6re objekt, du interagerer med, n\u00e5r du arbejder med biblioteket. Det g\u00f8r koden kortere, mere l\u00e6sevenlig og lettere at skrive.<\/p>\n\n

“Uncaught TypeError: $ is not a function” er noget vanskelig at fejlfinde, fordi du ikke f\u00e5r vist en klar fejlmeddelelse. I mods\u00e6tning til andre WordPress-fejl kan dette problem udl\u00f8ses af fejlkonfigurerede elementer p\u00e5 dit websted eller endda en 404-fejlside<\/a>:<\/p>\n

\"Screenshot
404 “side ikke fundet” fejl<\/figcaption><\/figure>\n

Den mest effektive m\u00e5de at diagnosticere problemet p\u00e5 er ved at tage et kig p\u00e5 udviklerkonsollen eller ved at bruge WordPress debug-logfiler<\/a>.<\/p>\n

Hvad er hoved\u00e5rsagerne til “Uncaught TypeError: $ Is Not a Function”-fejlen?<\/h2>\n

Fejlen “Uncaught TypeError: $ is not a function” har alt at g\u00f8re med jQuery. Du l\u00f8ber ind i dette problem, n\u00e5r en funktion, der indeholder symbolet “$”, udf\u00f8res, mens webstedet indl\u00e6ses.<\/p>\n

Her er nogle potentielle \u00e5rsager bag fejlen:<\/p>\n

    \n
  1. JQuery-biblioteket er ikke korrekt indl\u00e6st<\/strong>. Hvis jQuery-biblioteket ikke er korrekt indl\u00e6st eller sat i k\u00f8, vil “$”-symbolet ikke blive genkendt som en gyldig funktion, og der vil opst\u00e5 en fejl. Dette er typisk ikke et problem i WordPress, fordi CMS’et (Content Management System) indl\u00e6ser biblioteket automatisk.<\/li>\n
  2. Du bruger jQuery i noConflict-tilstand. <\/strong>Som standard k\u00f8rer WordPress jQuery i noConflict-tilstand<\/a>. Det betyder, at det ikke genkender “$”-symbolet som et funktionsnavn. Hvis du vil bruge det, skal du s\u00e6tte en omg\u00e5else i gang.<\/li>\n
  3. Plugin- eller tema-konflikter.<\/strong> Nogle plugins eller temaer kan have ukorrekt kodet JavaScript, der forstyrrer jQuerys korrekte funktion eller bruger “$”-symbolet p\u00e5 en m\u00e5de, der skaber problemer med andre scripts<\/a>.<\/li>\n<\/ol>\n

    For at opsummere, WordPress er ikke konfigureret til at genkende “$”-symbolet. Det betyder dog ikke, at du ikke kan k\u00f8re jQuery-kode i CMS’et. Biblioteket er trods alt en del af WordPress. Det, du skal g\u00f8re, er at bruge en omg\u00e5else for at undg\u00e5 problemer med “$”-symbolet.<\/p>\n

    S\u00e5dan l\u00f8ser du fejlen “Uncaught TypeError: $ Is Not a Function” Error (2 metoder)<\/h2>\n

    F\u00f8r vi g\u00e5r i gang, er det vigtigt at bem\u00e6rke, at jQuery allerede er en del af WordPress. Nogle vejledninger vil instruere dig i at s\u00e6tte jQuery i k\u00f8<\/a>, men biblioteket har v\u00e6ret en del af Content Management System (CMS) i et stykke tid.<\/p>\n

    WordPress k\u00f8rer ogs\u00e5 jQuery i “noConflict”-tilstand out of the box. Det betyder, at det frigiver “$”-symbolet, s\u00e5 andre biblioteker kan bruge det. I stedet for at deaktivere “noConflict”-tilstanden skal du gribe dette problem an p\u00e5 f\u00f8lgende m\u00e5de.<\/p>\n

    1. Brug “jQuery” i stedet for “$”<\/h3>\n

    Hvis du st\u00f8der p\u00e5 problemer, mens du bruger “$”-symbolet i funktioner, kan du bruge “jQuery” i stedet. For at give dig et eksempel er her, hvordan en grundl\u00e6ggende jQuery-funktion, der bruger “$”, kan se ud:<\/p>\n

    $(function() {\n  \/\/ Your code here will run once the DOM is ready\n});<\/code><\/pre>\n
    I dette tilf\u00e6lde ville en hurtig l\u00f8sning v\u00e6re at erstatte “$”-symbolet med jQuery. Koden ville s\u00e5 se s\u00e5ledes ud:<\/p>\n
    jQuery(function() {\n  \/\/ This code will not trigger the error\n});<\/code><\/pre>\n
    Alternativt kan du “pakke” koden ind i et funktionsudtryk, der straks p\u00e5ber\u00e5bes, og som indeholder jQuery-symbolet. Det f\u00f8lgende eksempel ville ikke <\/em>udl\u00f8se fejlen “Uncaught TypeError: $ is not a function”, fordi det bruger jQuery-symbolet som en indpakning:<\/p>\n
    jQuery(function ($) {\n    \/\/ You can use $ inside the wrapper\n    console.log($('.primary-menu'));\n});<\/code><\/pre>\n
    N\u00e5r du har foretaget disse \u00e6ndringer i koden, kan du bruge din browsers udviklerkonsol eller WordPress debug-loggen for at se, om fejlen forts\u00e6tter. Hvis den g\u00f8r, skal du muligvis mappe “jQuery” til et andet symbol for at omg\u00e5 flere fejl.<\/p>\n
    2. Brug et brugerdefineret alias i jQuery<\/h3>\n
    “$” er standardaliaset for jQuery-objektet. Men da WordPress k\u00f8rer jQuery i noConflict-tilstand, skal du muligvis mappe et alternativt alias for at undg\u00e5 konflikter med andre biblioteker.<\/p>\n
    Denne proces er relativt enkel, da du kan mappe aliaset til et nyt symbol med en enkelt kodelinje:<\/p>\n
    vvar $j = jQuery;<\/code><\/pre>\n
    Denne kode erstatter standardaliaset med “$j”, men det kan v\u00e6re hvad som helst andet, du \u00f8nsker. Nogle udviklere foretr\u00e6kker denne fremgangsm\u00e5de frem for at skulle skrive hele “jQuery”-objektet, som vi viste i den foreg\u00e5ende metode.<\/p>\n
    Hvis du ikke er sikker p\u00e5, hvor du skal tilf\u00f8je denne kode, kan du l\u00e6se vores vejledning om, hvordan du tilf\u00f8jer kode til headeren og footeren i WordPress<\/a>. Husk p\u00e5, at selv hvis du registrerer et nyt alias, kan du stadig bruge “jQuery” i stedet for dette symbol.<\/p>\n\n
    Oversigt<\/h2>\n
    WordPress giver dig mulighed for at bruge jQuery p\u00e5 dit websted. Men hvis du vil undg\u00e5 fejl som “Uncaught TypeError: $ is not a function”, skal du forst\u00e5, hvordan CMS’et implementerer biblioteket. WordPress bruger jQuerys “noConflict”-tilstand, hvilket betyder, at den ikke genkender “$”-symbolet.<\/p>\n
    Fejlen “Uncaught TypeError: $ is not a function” vises, n\u00e5r du fors\u00f8ger at bruge en funktion, der kalder jQuery ved hj\u00e6lp af “$”. For at omg\u00e5 dette problem kan du skrive det fulde jQuery-objekt i stedet eller mappe aliaset til et andet symbol for at undg\u00e5 konflikter.<\/p>\n
    Hvis du bruger Kinsta, kan du aktivere WordPress-fejlfindingstilstand i MyKinsta<\/a>-dashboardet for at diagnosticere problemer. Desuden tilbyder alle vores abonnementer support af h\u00f8jeste kvalitet for at hj\u00e6lpe dig med at fejlfinde eventuelle problemer, som du m\u00e5tte st\u00f8de p\u00e5. Tjek vores planer ud<\/a>!<\/p>\n","protected":false},"excerpt":{"rendered":"
    WordPress underst\u00f8tter JavaScript og jQuery-biblioteket fuldt ud. Den m\u00e5de, som WordPress implementerer jQuery p\u00e5, kan dog f\u00f8re til fejl, n\u00e5r du fors\u00f8ger at udf\u00f8re funktioner. Et …<\/p>\n","protected":false},"author":199,"featured_media":50201,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[704],"class_list":["post-50200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-javascript-fejl"],"yoast_head":"\nS\u00e5dan rettes \u201cUncaught TypeError: $ Is Not a Function\u201d fejlen - Kinsta\u00ae<\/title>\n<meta name=\"description\" content=\"Fejlen "Uncaught TypeError: $ Is Not a Function" er en almindelig Javascript-fejl. 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