Add types

Closes GH-8.
Closes GH-9.

Reviewed-by: Christian Murphy <christian.murphy.42@gmail.com>
Reviewed-by: Titus Wormer <tituswormer@gmail.com>

package.json

@@ -16,14 +16,18 @@
     "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
   ],
   "files": [
-    "index.js"
+    "index.js",
+    "types/index.d.ts"
   ],
+  "types": "types/index.d.ts",
   "dependencies": {
     "is-empty": "^1.0.0"
   },
   "devDependencies": {
+    "@types/unist": "^2.0.3",
     "browserify": "^16.0.0",
     "chalk": "^2.3.0",
+    "dtslint": "^1.0.2",
     "nyc": "^14.0.0",
     "prettier": "^1.0.0",
     "remark-cli": "^6.0.0",
@@ -41,7 +45,8 @@
     "build": "npm run build-bundle && npm run build-mangle",
     "test-api": "node test",
     "test-coverage": "nyc --reporter lcov tape test.js",
-    "test": "npm run format && npm run build && npm run test-coverage"
+    "test": "npm run format && npm run build && npm run test-coverage",
+    "dtslint": "dtslint types"
   },
   "prettier": {
     "tabWidth": 2,

types/index.d.ts

@@ -0,0 +1,27 @@
+// TypeScript Version: 3.0
+import { Node } from 'unist';
+
+export = inpect;
+
+/*
+ * Unist utility to inspect the details of a Unist Node
+ *
+ * @param node Node to inspect
+ */
+declare function inpect(node: Node): string;
+
+declare namespace inpect {
+  /**
+   * Inspect the given Node and include colors from the results
+   *
+   * @param node Node to inspect
+   */
+  function color(node: Node): string;
+
+  /**
+   * Inspect the given Node and exclude colors from the results
+   *
+   * @param node Node to inspect
+   */
+  function noColor(node: Node): string;
+}

types/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+      "lib": ["es2015"],
+      "strict": true,
+      "baseUrl": ".",
+      "paths": {
+          "unist-util-inspect": ["index.d.ts"]
+      }
+  }
+}

types/tslint.json

@@ -0,0 +1,3 @@
+{
+  "extends": "dtslint/dtslint.json"
+}

types/unist-util-inspect-tests.ts

@@ -0,0 +1,30 @@
+import * as inspect from 'unist-util-inspect';
+
+const node = {
+    type: 'node',
+    data: {
+        string: 'string',
+        number: 1,
+        object: {
+            key: 'value'
+        },
+        array: [],
+        boolean: true,
+        null: null
+    },
+    position: {
+        start: {
+            line: 1,
+            column: 1,
+            offset: 0
+        },
+        end: {
+            line: 1,
+            column: 4,
+            offset: 0
+        },
+        indent: [1]
+    }
+};
+
+const result: string = inspect(node);