slur direction

[nbruley]

Though I'm not a music theory expert, it would seem to me that the slur here would be better going up.

Is there a way to do that?
One ABC reference seems to indicate that an apostrophe can be used to force the direction, but that doesn't work...
('EFG)
I'm using abcjs-basic v6.2.2

[paulrosen]

I think, according to Gould, the slur is in the right direction but it should be outside the beam. The rules are complicated, which is why you are finding a lot of odd cases. If I can fix this particular case quickly I'll squeeze it into the next minor release.

[nbruley]

Would love to have the slur placement fixed as it will make our scores look much better; I recognize the programming for that is likely quite complicated.