add TypeScript definitions

.gitignore

@@ -1,3 +1,5 @@
+/package-lock.json
+
 # Logs
 logs
 *.log

index.d.ts

@@ -0,0 +1,44 @@
+declare namespace JsonSourceMap {
+  export interface ParseOptions {
+    bigint?: boolean;
+  }
+
+  export type PointerProp = "value" | "valueEnd" | "key" | "keyEnd";
+
+  export interface Location {
+    line: number;
+    column: number;
+    pos: number;
+  }
+
+  export type Pointers = Record<string, Record<PointerProp, Location>>;
+
+  export interface ParseResult {
+    data: any;
+    pointers: Pointers;
+  }
+
+  export function parse(
+    source: string,
+    _reviver?: any,
+    options?: ParseOptions
+  ): ParseResult;
+
+  export interface StringifyOptions {
+    space?: string | number;
+    es6?: boolean;
+  }
+
+  export interface StringifyResult {
+    json: string;
+    pointers: Pointers;
+  }
+
+  export function stringify(
+    data: any,
+    _replacer?: any,
+    options?: string | number | StringifyOptions
+  ): StringifyResult;
+}
+
+export = JsonSourceMap;

package.json

@@ -3,6 +3,7 @@
   "version": "0.6.1",
   "description": "Parse/stringify JSON and provide source-map for JSON-pointers to all nodes",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "eslint": "eslint index.js spec",
     "test-spec": "mocha spec -R spec",