CSS Indexes: A listing of every term defined by CSS specs

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This is a non-normative document. It lists every term defined in CSS, as long as it’s marked up correctly for the spec generator. It is intended as a reference document for authors, implementors, and spec authors, to aid in finding the definition for a term hidden somewhere in the haystack of CSS specs.


  1. Do you know good tutorials and/or examples about dealing with responsive images that are fluid horizontaly, but with a fixed height?

    Using object-fit: cover; in the CSS is easy, but how can we prevent loading many pixels that will be hidden, without using too many <source> in a <picture>?