Mappings for Text Fragments

[aleventhal]

Text fragments - URIs | MDN
Usually, to link to a specific part of a webpage, you would include the URL and the document fragment(ID) of that section. For example, https://w3c.github.io/aria/#states_and_properties. The author of the page must include IDs for elements that they want to be linked to.

With text fragments, link authors can specify text content to link to, rather than document fragments.
The syntax is:

https://example.com#:~:text=[prefix-,]textStart[,textEnd][,-suffix]

Example: https://w3c.github.io/aria/#:~:text=semantic,accessible
This scrolls to and highlights the first instance of a text string starting with semantic and ending with accessible.
Browser Support: Chrome 81, Edge 83, Firefox (Not supported), Opera 68, Safari (Not supported)
Accessibility:
For IA2/ATK, this should be exposed as a text attribute mark:true (IA2/ATK)
For Mac, expose as AXHighlight (undocumented property).
Accessibility Status: Supported in Firefox, not supported in Chromium yet (bug).

[spectranaut]

@benbeaudry do you know what the mappings for this should be in UIA?