Discussing with the boss:

boss: < How is it going? >
me: < I'm trying to rewrite this horrible javascript code with typescript >
boss: < But release cannot support typescript >
me: < I can compile typescript locally and then release >
boss: < You are not listening to me! we can not execute a script in typescript >
me: < In fact we will use a script in javascript >
boss: < So why are you rewriting it in typescript? >

And so the discussion continued for another 20 minutes...