Hello!
Continuing the series of typescript-related questions 
Using Typescript offline in vscode, bundling the scripts into one “game.js” file with webpack and uploading changes with Poseidon.
So, I wanted to use an external lib; moment.js.
#round 1: I installed it with npm and webpack bundled it in my game.js. Unsurprisingly, this didn’t work too well! I don’t think the editor very much liked parsing it in the same context as the scripts.
#round 2: I downloaded the moment.js file from the site and uploaded it to my playcanvas project. I then changed my webpack config to have moment.js as an external lib:
externals: {
moment: 'moment'
}
Built, uploaded, but alas - the editor wouldn’t have it. ReferenceError, moment is not defined when I press the parse button on game.js. But! When I run the game, everything works exactly as it should.
I have a feeling there’s a simple solution here, to make the editor catch on 
The question is basically, how should I be working with external libs in a typescript project for playcanvas? But in case you’d like some more info about the error:
assets-script-parse-worker.js:278 Uncaught ReferenceError: moment is not defined
at Object.moment (external "moment":1)
at __webpack_require__ (bootstrap:19)
at Object../src/countdown.ts (countdown.ts:2)
at __webpack_require__ (bootstrap:19)
at Object../src/main.ts (main.ts:4)
at __webpack_require__ (bootstrap:19)
at bootstrap:83
at bootstrap:83
at parseScript (assets-script-parse-worker.js:278)
at onmessage (assets-script-parse-worker.js:7)
The top of the stacktrace corresponds to:
module.exports = moment;
The rest is just standard webpack stuff.
Also for your convenience, moment.js can be found here: https://momentjs.com/downloads/moment.js