ScreepsAutocomplete

_references.js

/// <reference path="ConstructionSite.js" />
/// <reference path="Creep.js" />
/// <reference path="Flag.js" />
/// <reference path="Game.js" />
/// <reference path="Memory.js" />
/// <reference path="Mineral.js" />
/// <reference path="Nuke.js" />
/// <reference path="Order.js" />
/// <reference path="OwnedStructure.js" />
/// <reference path="PathFinder.js" />
/// <reference path="RawMemory.js" />
/// <reference path="Resource.js" />
/// <reference path="Room.js" />
/// <reference path="RoomObject.js" />
/// <reference path="RoomPosition.js" />
/// <reference path="Source.js" />
/// <reference path="Structure.js" />
/// <reference path="Structures/StructureContainer.js" />
/// <reference path="Structures/StructureController.js" />
/// <reference path="Structures/StructureExtension.js" />
/// <reference path="Structures/StructureExtractor.js" />
/// <reference path="Structures/StructureKeeperLair.js" />
/// <reference path="Structures/StructureLab.js" />
/// <reference path="Structures/StructureLink.js" />
/// <reference path="Structures/StructureNuker.js" />
/// <reference path="Structures/StructureObserver.js" />
/// <reference path="Structures/StructurePortal.js" />
/// <reference path="Structures/StructurePowerBank.js" />
/// <reference path="Structures/StructurePowerSpawn.js" />
/// <reference path="Structures/StructureRampart.js" />
/// <reference path="Structures/StructureRoad.js" />
/// <reference path="Structures/StructureSpawn.js" />
/// <reference path="Structures/StructureStorage.js" />
/// <reference path="Structures/StructureTerminal.js" />
/// <reference path="Structures/StructureTower.js" />
/// <reference path="Structures/StructureWall.js" />
/// <reference path="Global/Constants.js" />

Add this to 'ScreepsAutocomplete' folder. As well as add 'jsconfig.json' with the following to the root folder of your project:
{ "compilerOptions": { "target": "ES6" }, "exclude": [ "node_modules" ] } then VSCode will pick up on ScreepsAutocomplete.