tsconfig.json

{
	"compilerOptions": {
		"diagnostics": true,
		"strict": true, // catch poor code conventions
		"allowJs": false, // allow importing js files in your project (rather than ts/x)
		"forceConsistentCasingInFileNames": true,
		"skipLibCheck": true, // checking will compare your lib types to the types you use in code
		"allowSyntheticDefaultImports": true, // sets default where none. so you can import d from '' without import * as d from ''
		"esModuleInterop": true, // honestly not sure, works with allowSyntheticDefaultImports
		"declaration": true, // export a d.ts file for each ts file in project
		"removeComments": true,
		"isolatedModules": true, // warn if there is code that cannot be transpiled into single-file (useful for rollup)
		"lib": [
			"ESNext",
		], // libraries to look for type definitions
		"target": "ESNext", // which JavaScript language version is emitted
		"outDir": ".build",
	},
	"files": [
		"src/@types/index.d.ts"
	],
	"include": [
		"src/*"
	]
}