[playground] Show transpiled output for JavaScript inputs

[nicolo-ribaudo]

Acknowledgement

• I acknowledge that issues using this template may be closed without further explanation at the maintainer's discretion.

Comment

Apologies if this is the wrong repository, I could not find one for the playground.

When setting the input language to "JavaScript", the playground does not show the transpiled code on the right. Instead, it shows the input code as-is.

You can test it by setting the target to ES2015 and writing 1 ** 2 in the input file: if the language is set to TypeScript you'll see Math.pow(1, 2) on the right (playground), while if the language is set to JavaScript you'll see 1 ** 2 (playground).

Is there a way to see the transpiled code?

[MartinJohns]

https://github.com/microsoft/TypeScript-Website

Supposedly it used to work? microsoft/TypeScript-Website#169

[Andarist]

I'm almost sure this is the culprit of this difference in the behavior:
https://github.com/microsoft/TypeScript-Website/blob/1f8e642574ce992bfd573a96b5e3de43d8ac044a/packages/sandbox/src/index.ts#L307-L319