April 2025
Intermediate to advanced
1128 pages
32h 5m
Portuguese (Portugal, Brazil)
Content preview from CSS: O Guia Definitivo, 5ª Edição
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Capítulo 10. Flutuação e posicionamento
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Durante muito tempo, os elementos flutuantes foram a base de todos os nossos esquemas de layout da web. (Isto deve-se, em grande parte, à propriedade clear, que iremos abordar daqui a pouco.) Mas os elementos flutuantes nunca foram concebidos para o layout; a sua utilização como ferramenta de layout era um hack quase tão flagrante como a utilização de tabelas para o layout. Eram apenas o que tínhamos. No entanto, os floats são bastante interessantes e úteis por si só. Isto é especialmente verdade devido à recente adição de float shaping, que permite a criação de formas não rectangulares pelas quais o conteúdo pode fluir.
Flutuante
Desde o início dos anos 90 que é possível fazer flutuar imagens declarando, por exemplo, <img src="b5.gif" alt="B4" align="right">. Isto faz com que uma imagem flutue para a direita e permite que outro conteúdo (como texto) "flua à volta" da imagem. O nome floating, de facto, veio da página do Netscape DevEdge "Extensions to HTML 2.0", que explicava o então novo atributo align. Ao contrário do HTML, o CSS permite-te flutuar qualquer elemento, desde imagens a parágrafos e listas. Isto é conseguido utilizando a propriedade float.
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