{"id":3647,"date":"2011-07-30T15:52:04","date_gmt":"2011-07-30T15:52:04","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=3647"},"modified":"2012-08-30T09:23:58","modified_gmt":"2012-08-30T09:23:58","slug":"controlar-campos-vacios-la-longitud-con-jquery","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/","title":{"rendered":"Controlar campos vacios y la longitud con jQuery"},"content":{"rendered":"

\"\"<\/a>En este art\u00edculo vamos a ver como controlar o validar los campos o inputs de un formulario con jQuery.<\/p>\n

Normalmente solo necesitamos validar que el campo haya sido rellenado, pero para comprobar la veracidad de los datos a veces es necesario tener en cuenta el n\u00famero de caracteres. Por ejemplo en los campos de tel\u00e9fono, para validar que un n\u00famero tiene 9 caracteres y que los caracteres introducidos son num\u00e9ricos.<\/p>\n

Primero vamos a comprobar que el campo no est\u00e1 vac\u00edo:<\/p>\n

if($(\"#phone\").val().length < 1) {\r\n\u00a0\u00a0 \u00a0alert(\"El nombre es obligatorio\");\r\n\u00a0\u00a0 \u00a0return false;\r\n}<\/pre>\n
Y luego observar si en el campo tel\u00e9fono se han escrito exactamente 9 car\u00e1cteres:<\/p>\n
if($(\"#phone\").val().length != 9) {\r\n\u00a0\u00a0 \u00a0alert(\"El tel\u00e9fono debe tener 9 caracteres\");\r\n\u00a0\u00a0 \u00a0return false;\r\n}<\/pre>\n
El anterior c\u00f3digo jQuery lo a\u00f1adiremos dentro del cl\u00e1sico document(ready), en los puntos suspensivos:<\/p>\n
<script type=\"text\/javascript\" src=\"jquery.js\"><\/script>\r\n<script type=\"text\/javascript\">\r\n$(document).ready(function() {\r\n   $('#send').click(function(){\r\n     ...\r\n   });\r\n});<\/pre>\n
En este caso, tendremos un bot\u00f3n con id=\u00bbsend\u00bb que tras pulsarlo pasaremos a ejecutar el c\u00f3digo que haya dentro.<\/p>\n
Y en nuestro <body> dentro del formulario tendremos un input con id=\u00bbphone\u00bb<\/p>\n
<input type=\"text\" id=\"phone\" name=\"phone\" \/><\/pre>\n
Si no queda claro puedes ver el ejemplo en funcionamiento<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
En este art\u00edculo vamos a ver como controlar o validar los campos o inputs de un formulario con jQuery. Normalmente solo necesitamos validar que el campo haya sido rellenado, pero para comprobar la veracidad de los datos a veces es necesario tener en cuenta el n\u00famero de caracteres. Por ejemplo en los campos de tel\u00e9fono, […]<\/p>\n","protected":false},"author":1,"featured_media":3651,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[84,79,77],"class_list":["post-3647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jquery","tag-formularios","tag-inputs","tag-validaciones"],"yoast_head":"\nControlar campos vacios y la longitud con jQuery - Jose Aguilar Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Controlar campos vacios y la longitud con jQuery - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"En este art\u00edculo vamos a ver como controlar o validar los campos o inputs de un formulario con jQuery. Normalmente solo necesitamos validar que el campo haya sido rellenado, pero para comprobar la veracidad de los datos a veces es necesario tener en cuenta el n\u00famero de caracteres. Por ejemplo en los campos de tel\u00e9fono, […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/\" \/>\n<meta property=\"og:site_name\" content=\"Jose Aguilar Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/joseaguilarblog\" \/>\n<meta property=\"article:published_time\" content=\"2011-07-30T15:52:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2012-08-30T09:23:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/07\/jquery1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"200\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Jose Aguilar\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@JoseAguilarBlog\" \/>\n<meta name=\"twitter:site\" content=\"@JoseAguilarBlog\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jose Aguilar\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/\",\"name\":\"Controlar campos vacios y la longitud con jQuery - Jose Aguilar Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/07\/jquery1.png\",\"datePublished\":\"2011-07-30T15:52:04+00:00\",\"dateModified\":\"2012-08-30T09:23:58+00:00\",\"author\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/#primaryimage\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/07\/jquery1.png\",\"contentUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/07\/jquery1.png\",\"width\":200,\"height\":200},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-campos-vacios-la-longitud-con-jquery\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\/\/www.jose-aguilar.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Controlar campos vacios y la longitud con jQuery\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/\",\"name\":\"Jose Aguilar Blog\",\"description\":\"Desarrollo Web con PrestaShop, WordPress, PHP, jQuery y Ajax\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.jose-aguilar.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\",\"name\":\"Jose Aguilar\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g\",\"caption\":\"Jose Aguilar\"},\"description\":\"Director ejecutivo y tecnol\u00f3gico en JA Modules. 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