Use selected TS version in the editor

[Gerrit0]

The current Monaco editor doesn't support TS 3.7, so pasting in an assertion function reports errors even with TS 3.7 selected under options - https://ts-ast-viewer.com/#code.... The parse result is correctly displayed in the middle & right panes, but errors show up in the left pane.

export function predicate (arg: any): asserts arg is string {
  if (typeof arg !== 'string') {
    throw new Error('Was not a string')
  }
}

[dsherret]

Yes, that would be nice!

I think what might be best here is to create a fork of https://github.com/microsoft/monaco-typescript that could reuse the compiler objects from the rest of the site. Then it could maybe be swapped in for the current typescript plugin.

[ArnaudBarre]

Hello ! I ran into this when analyzing the AST for import attributes.
Can the editor be updated and a small hint a the bottom that give the TS version of the editor?