Declare a global variable like jQuery inline with TypeScript

Question

I want to use TypeScript to only analyze JavaScript files (during a transition period, possibly). I've stumbled upon the problem of defining global variables inline in JSDoc or similar. It's not described here: https://www.typescriptlang.org/docs/handbook/type-checking-javascript-files.html

By the way, the syntax to do it in Flow is:

/*:: declare var $: Object */

Is there something similar for tsc?

Edit: Or, alternatively, the possibility to include a global declaration file when analyzing .js files?

user_2138090 · Answer

Not supported, but there's a discussion about it here: https://github.com/microsoft/TypeScript/issues/15626

Otherwise, add a globals.d.ts and include it when type-checking. For jQuery, something like:

declare function $(str: string): Object