Tip Precoz: obtener valor numérico con JavaScript

11/Abr/2012 227

Con jQuery constantemente necesitamos crear variables para tomar valores CSS de elementos, para luego construir nuevos elementos o interacciones; constantemente lo hago en plugins cono Timelinr o Blox!, pero JavaScript nos ofrece un método más rápido que el andar haciendo slices.

Desde el siguiente ejemplo, tomaremos la el valor CSS de margin-top del buscador de este mismo sitio; normalmente lo haríamos de esta manera:

var marginT = $('#search_container').css('margin-top');

Click para ver ejemplo 1

Ejemplo1: obtener valor numérico con JavaScript

El valor entregado efectivamente es el correcto: 10px pero lo necesitamos numérico. Para ello utilizamos replace():

var marginT = $('#search_container').css('margin-top').replace('px','');

Click para ver ejemplo 2

Ejemplo2: obtener valor numérico con JavaScript


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