Compiler "target" option capitalization in docs inconsistent with code and json schema

[evmar]

https://github.com/Microsoft/TypeScript/wiki/Compiler-Options
says --target can take the value ES5 (uppercase).

Visual Studio Code warns about using the uppercase one in your tsconfig.json, presumably because it's following the schema.

The JSON schema for tsconfig.json also has it in lowercase, but the docs (https://github.com/Microsoft/TypeScript/wiki/tsconfig.json#details) refer you to the first page (which uses uppercase) for the values.

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My guess at fixing the problem:

From the source it appears the value ought to be lowercase:
https://github.com/Microsoft/TypeScript/blob/master/src/compiler/commandLineParser.ts#L221

I think the fix is to use lowercase in the docs (the first page).

[RyanCavanaugh]

It's actually case-insensitive. The commandline parser normalizes its inputs to lower-case (https://github.com/Microsoft/TypeScript/blob/master/src/compiler/commandLineParser.ts#L378), which is why the options map in the linked source file writes them in lowercase.

[RyanCavanaugh]

That said... we should update the schema with the preferred spellings of the values

[evmar]

I guess the real bug is "VS Code warns about something that the docs indicate should be fine". I was jumping ahead of myself in guessing at the cause and likely fix, so I leave that to you, but I am fairly sure the bug is somewhere around this repo rather than in the VS Code one.

I'm gonna rearrange the initial bug report to be more clear on this.