CSS3 selectors

Advanced element selection using selectors including: `[foo^="bar"]`, `[foo$="bar"]`, `[foo*="bar"]`, `:root`, `:nth-child()`, `:nth-last-child()`, `:nth-of-type()`, `:nth-last-of-type()`, `:last-child`, `:first-of-type`, `:last-of-type`, `:only-child`, `:only-of-type`, `:empty`, `:target`, `:enabled`, `:disabled`, `:checked`, `:not()`, `~` (general sibling)

selection api: `empty()` as alias of `removeallranges()`

trustedtypepolicyfactory api: emptyhtml

trustedtypepolicyfactory api: emptyscript

css property: empty-cells

css selector: `:empty`

css selector: `:empty`: matches elements with whitespace

javascript built-in: regexp: source: "(?:)" for empty regexps

javascript statement: empty statement (`;`)

empty tag syntax: <>