1. Dart
2. dart:html
3. TextMetrics
4. emHeightDescent property

TextMetrics class

1. Properties
2. actualBoundingBoxAscent
3. actualBoundingBoxDescent
4. actualBoundingBoxLeft
5. actualBoundingBoxRight
6. alphabeticBaseline
7. emHeightAscent
8. emHeightDescent
9. fontBoundingBoxAscent
10. fontBoundingBoxDescent
11. hangingBaseline
12. ideographicBaseline
13. width
14. hashCode
15. runtimeType
16. Methods
17. noSuchMethod
18. toString
19. Operators
20. operator ==

num get emHeightDescent native;