{"id":1053,"date":"2011-10-31T13:37:15","date_gmt":"2011-10-31T13:37:15","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=1053"},"modified":"2018-03-14T11:02:37","modified_gmt":"2018-03-14T11:02:37","slug":"simple-jquery-spy-effect","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/simple-jquery-spy-effect\/","title":{"rendered":"Simple jQuery Spy Effect"},"content":{"rendered":"<p><a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2011\/10\/jquery1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft  wp-image-4367\" title=\"jquery\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2011\/10\/jquery1-150x150.png\" alt=\"\" width=\"120\" height=\"120\" srcset=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2011\/10\/jquery1-150x150.png 150w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2011\/10\/jquery1-80x80.png 80w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2011\/10\/jquery1-180x180.png 180w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2011\/10\/jquery1.png 256w\" sizes=\"auto, (max-width: 120px) 100vw, 120px\" \/><\/a>En este art\u00edculo vamos hablar sobre un script que nos permite tener en nuestra Web un visor din\u00e1mico de art\u00edculos, noticias o lo que fuera de forma vertical.<\/p>\n<p>Se trata de un m\u00f3dulo que se podr\u00eda incorporar f\u00e1cilmente a una columna de nuestra Web o en el contenido ya que su estilo css es muy f\u00e1cil de modificar.<\/p>\n<p>El script tiene el a\u00f1adido de que estamos iterando un tabla de art\u00edculos de la base de datos mediante PHP donde mostramos la imagen, t\u00edtulo, fecha de inserci\u00f3n, autor, etc.<\/p>\n<p>Para implementar el script es necesario incluir las librer\u00edas de jQuery y disponer del siguiente c\u00f3digo jQuery:<\/p>\n<pre>&lt;script type=\"text\/javascript\" charset=\"utf-8\"&gt;\r\n$(function () {\r\n\u00a0\u00a0\u00a0 $('ul.spy').simpleSpy();\r\n});\r\n\r\n(function ($) {\r\n\r\n$.fn.simpleSpy = function (limit, interval) {\r\n\u00a0\u00a0\u00a0 limit = limit || 4;\r\n\u00a0\u00a0\u00a0 interval = interval || 4000;\r\n\r\n\u00a0\u00a0\u00a0 return this.each(function () {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ 1. setup\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ capture a cache of all the list items\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ chomp the list down to limit li elements\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var $list = $(this),\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 items = [], \/\/ uninitialised\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 currentItem = limit,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 total = 0, \/\/ initialise later on\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 height = $list.find('&gt; li:first').height();\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ capture the cache\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $list.find('&gt; li').each(function () {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 items.push('&lt;li&gt;' + $(this).html() + '&lt;\/li&gt;');\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 });\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 total = items.length;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $list.wrap('&lt;div \/&gt;').parent().css({ height : height * limit });\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $list.find('&gt; li').filter(':gt(' + (limit - 1) + ')').remove();\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ 2. effect\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 function spy() {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ insert a new item with opacity and height of zero\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 var $insert = $(items[currentItem]).css({\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 height : 0,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 opacity : 0,\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 display : 'none'\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }).prependTo($list);\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ fade the LAST item out\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $list.find('&gt; li:last').animate({ opacity : 0}, 1000, function () {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ increase the height of the NEW first item\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $insert.animate({ height : height }, 1000).animate({ opacity : 1 }, 1000);\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ AND at the same time - decrease the height of the LAST item\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ $(this).animate({ height : 0 }, 1000, function () {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ finally fade the first item in (and we can remove the last)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $(this).remove();\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ });\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 });\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 currentItem++;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if (currentItem &gt;= total) {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 currentItem = 0;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 setTimeout(spy, interval)\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 spy();\r\n\u00a0\u00a0\u00a0 });\r\n};\r\n\r\n})(jQuery);\r\n&lt;\/script&gt;<\/pre>\n<p>El c\u00f3digo anterior jQuery es necesario para poder generar el efecto en movimiento vertical.<\/p>\n<p>El c\u00f3digo PHP para mostrar el listado de art\u00edculos es el siguiente:<\/p>\n<pre>&lt;div id=\"sidebar\"&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;ul&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0&lt;?php\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$consulta = \"SELECT idNoticia, titulo, DATE_FORMAT(fecha_insercion, '%d-%m-%Y') as fecha, resumen, imagen FROM noticias ORDER BY fecha_insercion desc\";\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$rs = mysql_query($consulta, $con);\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0while ($row = mysql_fetch_array($rs)) {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0?&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;li&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0&lt;?php\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (isset($row['imagen']) &amp;&amp; $row['imagen'] != \"\") {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0?&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0&lt;a href=\"#\" title=\"View round\"&gt;&lt;img width=\"70\" height=\"70\" src=\"..\/..\/..\/images\/noticias\/&lt;?=$row['imagen'];?&gt;\" title=\"&lt;?php echo $row['titulo']; ?&gt;\" \/&gt;&lt;\/a&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0&lt;?php\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0else {\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0?&gt;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0&lt;a href=\"#\" title=\"No existe imagen\"&gt;&lt;img width=\"70\" height=\"70\" src=\"images\/no-image.jpg\" title=\"La imagen no est\u00e1 disponible\" \/&gt;&lt;\/a&gt;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0&lt;?php\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0?&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;h5&gt;&lt;a href=\"#\" title=\"View round\"&gt;&lt;?php echo $row['titulo']; ?&gt;&lt;\/a&gt;&lt;\/h5&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;p&gt;&lt;?php echo $row['fecha']; ?&gt; por &lt;a href=\"https:\/\/www.jose-aguilar.com\/\" title=\"Visita la p&amp;aacute;gina oficial de Jose Aguilar\"&gt;Jose Aguilar&lt;\/a&gt;&lt;\/p&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;p class='rating four'&gt;4 estrellas&lt;\/p&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;p&gt;&lt;a href=\"#\" title='Ver m&amp;aacute;s informaci&amp;oacute;n'&gt;Ver m&amp;aacute;s&lt;\/a&gt;&lt;\/p&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;\/li&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;?php\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ?&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;\/ul&gt;\r\n\u00a0\u00a0\u00a0 &lt;\/div&gt;<\/pre>\n<p>Para realizar la consulta que mostramos anteriormente es necesario conectar con la base de datos para obtener los resultados de la query.<\/p>\n<p>Recorremos mediante un bucle todos los registros de la tabla \u00abnoticias\u00bb obteniendo los campos: titulo, fecha, resume, imagen para mostrarlos dentro de una lista html con &lt;ul&gt; y &lt;li&gt;.<\/p>\n<p>Ver ejemplo en funcionamiento<\/p>\n","protected":false},"excerpt":{"rendered":"<p>En este art\u00edculo vamos hablar sobre un script que nos permite tener en nuestra Web un visor din\u00e1mico de art\u00edculos, noticias o lo que fuera de forma vertical. Se trata de un m\u00f3dulo que se podr\u00eda incorporar f\u00e1cilmente a una columna de nuestra Web o en el contenido ya que su estilo css es muy [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4367,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,3],"tags":[],"class_list":["post-1053","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jquery","category-php"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Simple jQuery Spy Effect - 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=\"Simple jQuery Spy Effect - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"En este art\u00edculo vamos hablar sobre un script que nos permite tener en nuestra Web un visor din\u00e1mico de art\u00edculos, noticias o lo que fuera de forma vertical. 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