The position inside the element's content box where the text cursor would be if it were at the selected index.
The position is on the bottom-left corner of the character at the specified logical index. Index 0 corresponds to the position just before the first character, and for a string of length n, index n is just after the last character.
This API uses the visualElement's style to compute the result, so calling it before the styles are computed might return an incorrect value.