:is() CSS pseudo-class
The `:is()` (formerly `:matches()`, formerly `:any()`) pseudo-class checks whether the element at its position in the outer selector matches any of the selectors in its selector list. It's useful syntactic sugar that allows you to avoid writing out all the combinations manually as separate selectors. The effect is similar to nesting in Sass and most other CSS preprocessors.
CSS page-break properties
Properties to control the way elements are broken across (printed) pages.
css property: break-after: avoid
css property: break-after: avoid-column
css property: break-after: avoid-page
css property: break-after: supported in multi-column layout: avoid
css property: break-after: supported in multi-column layout: avoid-column
css property: break-after: supported in paged media: avoid-page
css property: break-before: avoid
css property: break-before: avoid-column
css property: break-before: avoid-page
css property: break-before: supported in multi-column layout: avoid
css property: break-before: supported in multi-column layout: avoid-column
css property: break-before: supported in paged media: `page` and `avoid-page`
css property: break-inside: avoid
css property: break-inside: avoid-column
css property: break-inside: avoid-page
css property: break-inside: supported in multi-column layout: avoid-column
css property: break-inside: supported in paged media: avoid-page
css property: page-break-after: avoid
css property: page-break-before: avoid
css property: page-break-inside: avoid
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