Web development Blog

Functional color notations that existed before CSS Color Module Level 4 (rgb(), rgba(), hsl(), hsla()) used to only except comma-separated lists of arguments. That changes with Module Level 4, now you can also provide space-separated arguments.

I was wondering what happens with HTML elements in web components when I add styles to the document. Under which circumstances do global styles defined in a style element or external stylesheet apply to these elements?

The inset property is a shorthand for the top, right, bottom, and/or left properties. It implements the same multi-value syntax like margin.

The :has() pseudo-class cannot be nested; :has() is not valid within :has().

Subgrid allows a grid-item with its own grid to align with its parent grid (currently only in Firefox 71+ and Safari 16+).

:has() allows you to check whether a parent element contains specific children.

The max() function takes a comma separated list of expressions. The largest value in the list will be selected.

The min() function takes a comma separated list of expressions. The smallest value in the list will be selected.

If you use a shorthand property like margin with all 4 values, the properties will always be applied in the direction top - right - bottom - left, no matter the reading direction.

Logical properties are a new way of working with directions and dimensions, one that allows you to control layout through logical, rather than physical mappings. This is especially useful, if you’re dealing with websites that are presented in different languages and writing modes, like right-to-left.