I’m unfamiliar with TS. Could someone explain this part?

> Invoke the compiler

    $ tsc *.ts --lib esnext --outFile /dev/stdout 
    var ᚾ = Symbol();
    var ᛊ = Symbol();
    var ᛚ = Symbol();
    var ᛞ = Symbol();

Why is there so little output? Is that because the compiler removed the unneeded types? And the author is implying that the task was boilerplate and pointless?