ERROR TypeError: Class constructor Lexer cannot be invoked without 'new'

[tawalters61]

I just tried using antlr4ts for the first time... and got the following error:

ERROR TypeError: Class constructor Lexer cannot be invoked without 'new'

This occurs at the time I attempt to create the Lexer for my DSL.

Any ideas?

Thanks.

[lujun2]

It may related to your tsconfig.json, try use es6 as your compile target

{
  "compilerOptions": {
     "target": "es6",
  }
}

[tawalters61]

Thanks. This worked.

[sharwell]

@lujun2 This project uses es2015 as the target. Do you know which targets I should expect to work and which ones not?

[piotrl]

It seem it does not work with es5 target (sadly, as it's still default target for many projects)