The link splits at the () characters

[Den-dp]

Here is the link

https://www.typescriptlang.org/play/#src=class%20Mammal%20%7B%7D%0D%0Aclass%20Pig%20extends%20Mammal%20%7B%0D%0A%20%20oink()%3Astring%20%7B%0D%0A%20%20%20%20return%20'oink!'%0D%0A%20%20%7D%3B%0D%0A%7D%0D%0Aclass%20Cow%20extends%20Mammal%20%7B%0D%0A%20%20moo()%3Astring%20%7B%0D%0A%20%20%20%20return%20'moo!'%0D%0A%20%20%7D%3B%0D%0A%7D%0D%0A%0D%0Avar%20mammal%3AMammal%20%3D%20new%20Mammal()%3B%0D%0Avar%20cow%3ACow%20%3D%20new%20Cow()%3B%0D%0Avar%20pig%3APig%20%3D%20new%20Pig()%3B%0D%0A%0D%0Amammal%20%3D%20cow%3B%0D%0Apig%20%3D%20mammal%3B%0D%0Apig.moo()%3B%0D%0Apig.oink()%3B

And t.co for this link looks like this

https://t.co/BeUgOqj8qj

which expands only to

https://www.typescriptlang.org/play/#src=class%20Mammal%20%7B%7D%0D%0Aclass%20Pig%20extends%20Mammal%20%7B%0D%0A%20%20oink

So generally splits on first parentheses character

[codemonkey3045]

@Den-dp Thanks for letting us know about this!