Ship TypeScript definitions

Generate .d.ts files in the /lib directory and include in npm package.

Author: wimpyprogrammer

package.json

@@ -9,15 +9,15 @@
   "author": "Drew Keller <drew@wimpyprogrammer.com>",
   "license": "MIT",
   "main": "lib/index.js",
-  "directories": {
-    "lib": "lib"
-  },
+  "types": "./lib/index.d.ts",
+  "files": ["lib/"],
   "engines": {
     "node": ">=8"
   },
   "scripts": {
-    "build": "npm run clean && babel src -d lib --extensions '.js,.ts' --ignore '**/*.spec.js','**/*.spec.ts'",
+    "build": "npm run clean && babel src -d lib --extensions '.js,.ts' --ignore '**/*.spec.js','**/*.spec.ts' && npm run build-types",
     "build-demo": "webpack --config demo/webpack.config.js",
+    "build-types": "tsc -p ./tsconfig.types.json",
     "clean": "rimraf lib/*",
     "format": "prettier --write 'src/**'",
     "lint": "tsc -p ./tsconfig.json; eslint ./src --report-unused-disable-directives --ext .js,.ts --parser-options=project:./tsconfig.json",

tsconfig.json

@@ -6,7 +6,6 @@
 		"downlevelIteration": true,
 		"esModuleInterop": true,
 		"forceConsistentCasingInFileNames": true,
-		"rootDir": "./",
 		"lib": [
 			"es5",
 			"es2015.collection",
@@ -20,6 +19,7 @@
 		"noImplicitReturns": true,
 		"noUnusedLocals": true,
 		"noUnusedParameters": true,
+		"outDir": "./lib",
 		"pretty": true,
 		"sourceMap": true,
 		"strict": true

tsconfig.types.json

@@ -0,0 +1,13 @@
+{
+	"compilerOptions": {
+		// Necessary due to https://github.com/microsoft/TypeScript/issues/7546
+		"allowJs": false,
+		"checkJs": false,
+
+		"declaration": true,
+		"emitDeclarationOnly": true,
+		"noEmit": false
+	},
+	"exclude": ["**/*.spec.ts"],
+	"extends": "./tsconfig.json"
+}