Tutoriales sobre Programacion: <script>

Para agregar y eliminar clases enjQuery haremos uso de las funciones.addClass() y.removeClass(), su sintaxis sería de la siguiente manera:

$('elementohtml').addClass('NombreDeClase');
$('elementohtml').removeClass('NombreDeClase');

$('') convierte nuestro elemento html en un objetojQuery y las funciones.addClass() y.removeClass() agregan a éste elemento html la clase la cual coloquemos como parámetro o argumento.

Un ejemplo de como agregar una clase por ejemplo a un párrafo para cambiar su color de fuente sería:

$(document).ready(function(){
         $('p').addClass('azul');    
});

Ésto suponiendo que tenemos en nuestrocss una clase llamada.azul:

.azul { 
color: #0938F0; 
}

Y si queremos cambiar la clase del párrafo al hacer clic en un botón haríamos lo siguiente:

-Para agregar el botón usaremos la etiqueta de htmlbutton , su sintaxis sería:

button type="button"Texto del boton/button

-Y nuestro botón sería:

button type="button"Agregar Clase/button

Nuestro código jQuery para cambiar la clase del párrafo haciendo clic en el botón "Agregar Clase" sería:

$(document).ready(function(){
    $('button').click(function(){
         $('p').addClass('azul');    
    });
});

Y para quitar una clase haciendo clic en un botón:

$(document).ready(function(){
    $('button').click(function(){
         $('p').removeClass('azul');    
    });
});

En el siguiente ejemplo agregamos una clase a un texto en undiv y lo transformamos en un cuadrado, y a un rectángulo le quitamos su clase y lo convertimos en un simple texto:

!DOCTYPE html
html
    head
 style
 h2 {
    font-family:arial;
}
 .rectangulo{
 display: inline-block;
 height:150px;
 width:400px;
 background-color:#BB17ED;
 font-family:arial;
 color:#ffffff;
 border-radius: 8px;
 text-align:center;
 margin-top:5px;
}
 .azul{
 display: inline-block;
 height:200px;
 width:200px;
 background-color:#0938F0;
 font-family:arial;
 color:#ffffff;
 border-radius: 8px;
 text-align:center;
 margin-top:5px;
}
 /style
     titleAgregar y eliminar clases jQuery/title
 script src="http://code.jquery.com/jquery-1.9.1.js"/script
 /head
 body
  h2Haz clic en los botones para eliminar y agregar las clases/h2
  button id="uno" type="button"Agregar Clase/button
  button id="dos" type="button"Quitar Clase/button
  /br
  div id="cuadrado"Soy un cuadro/div
  div Class="rectangulo"Soy un rectangulo/div    
 script
$(document).ready(function(){
    $('#uno').click(function(){
         $('#cuadrado').addClass('azul');    
    });
     $('#dos').click(function(){
         $('.rectangulo').removeClass('rectangulo');
    });
});
 /script
 /body
/html

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