October 2024
Intermediate to advanced
286 pages
5h 48m
Spanish
Content preview from Libro de recetas de la API web
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Capítulo 13. Elementos de IU
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Introducción
Los navegadores modernos tienen incorporados algunos potentes elementos de interfaz de usuario que puedes utilizar en tu aplicación. Antes, estos componentes de IU requerían bibliotecas de terceros (o podías crear las tuyas propias).
Diálogos
Los cuadros de diálogo emergentes son un pilar de muchas aplicaciones, ya que proporcionan información y solicitan datos. Existen innumerables bibliotecas de diálogos, y es posible crear la tuya propia. Los navegadores modernos ya lo han hecho por ti con el elemento <dialog>. Se trata de un diálogo emergente que incluye un fondo que cubre el resto de la página. Puedes aplicar estilos tanto al fondo como al diálogo con un poco de CSS. Por defecto, el diálogo es sólo una caja que aparece con el fondo detrás. De ti depende añadir un título, botones y otros contenidos.
Algunos cuadros de diálogo contienen varios botones, y quieres ejecutar un código diferente según la opción que elijan. Por ejemplo, un modal de confirmación puede tener botones Confirmar y Cancelar. También tendrás que manejar esto tú mismo, añadiendo escuchadores de eventos de clic a los botones. En cada escuchador de eventos, puedes cerrar el diálogo llamando a close sobre él. El método close es un método incorporado en el diálogo que toma un argumento opcional que te permite especificar un "valor de retorno". Esto puede ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.