svelte/tsconfig.json

{
	"include": [],

	"compilerOptions": {
		"rootDirs": ["src", "test"],

		// target node v8+ (https://node.green/)
		// the only missing feature is Array.prototype.values
		"lib": ["ES2017"],
		"target": "ES2017",

		"skipLibCheck": true,
		"declaration": true,
		"declarationDir": "types",

		"noEmitOnError": true,
		"noErrorTruncation": true,

		// rollup takes care of these
		"module": "ESNext",
		"moduleResolution": "node",
		"resolveJsonModule": true,
		"allowSyntheticDefaultImports": true,

		// TODO: error all the things
		//"strict": true,
		"noImplicitThis": true,
		"noUnusedLocals": true,
		"noUnusedParameters": true
	}
}