Apparently this is implemented in e.g. Adobe Reader, and the specification does support it, however it cannot be commonly used in real-world PDF documents since it took over ten years for this feature to be requested.
no-var
prefer-spread
for...of
ttx
class
test/add_test.js
verifyManifestFiles
"link": true
enhanceTextSelection
SimpleLinkService
unicorn/prefer-array-find
test/testutils.js
text