selection property
final
The range of text that is currently selected.
When selection is a TextSelection that has the same non-negative
baseOffset and extentOffset, the selection property represents the
caret position.
If the current selection has a negative baseOffset or extentOffset,
then the text currently does not have a selection or a caret location, and
most text editing operations that rely on the current selection (for
instance, insert a character at the caret location) will do nothing.
Implementation
final TextSelection selection;