CSS @supports
CSS3 trae consigo un nuevo selector como parte del grupo condicional feature queries: @supports. Esta regla (no es en sí un selector) prueba si el browser soporta cierto par de propiedad: valor y los operadores AND, IN, OR.
Uso:
Por ejemplo, si se quiere determinar si el browser soporta CSS Grids, se utiliza la nomenclatura como a continuación:
@supports (display: grid) {
.wrapper {
display: grid;
grid-template-columns: repeat(3, 1fr);
grid-gap: 10px;
grid-auto-rows: minmax(100px, auto);
}
.column-one {
grid-column: 1 / 3;
grid-row: 1;
}
...
}Para algo más complejo, en el siguiente ejemplo preguntamos si el browser no soporta CSS Grids para entregar un fallaback:
@supports not (display: grid) {
div { float: left; }
}Soporte:
Actualmente su soporte es amplio en browsers modernos, salvo a la fecha de la excepción de IE11 el cual no tienen ningún soporte.
Cuestionamiento:
Esto es algo personal, pero este feature querie en específico me causa un regreso a la web que era reinada por los browsers y no por los estándares. Escribir código para navegadores específicos y dejar sin soporte a otros que no tienen las mismas características es volver un poco a la época de los Applets, prefijos -webkit -moz y otros. Ojalá sea sólo una impresión mía.
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