A highlight pseudo element to allow authors to style scroll-to-text fragments different from the default UA highlighting.
Authors should be able to style the highlighted text from scroll-to-text fragments to have the style match that of the rest of the page. See https://chromestatus.com/feature/4733392803332096 for the scroll-to-text feature.
Explainers: https://drafts.csswg.org/css-pseudo/#selectordef-target-text