Added TypeScript typings

index.d.ts

@@ -0,0 +1,51 @@
+declare module 'zlib-sync' {
+	export interface InflateOptions {
+		chunkSize?: number;
+		to?: string;
+		windowBits?: number;
+	}
+
+	export class Inflate {
+		readonly windowBits: number;
+		readonly result: Buffer;
+		readonly msg: string;
+		readonly err: number;
+		readonly chunkSize: number;
+		public constructor(options?: InflateOptions);
+		public push(buffer: Buffer, flush?: boolean | number): void;
+	}
+
+	export const Z_NO_FLUSH: number;
+	export const Z_PARTIAL_FLUSH: number;
+	export const Z_SYNC_FLUSH: number;
+	export const Z_FULL_FLUSH: number;
+	export const Z_FINISH: number;
+	export const Z_BLOCK: number;
+	export const Z_TREES: number;
+	export const Z_OK: number;
+	export const Z_STREAM_END: number;
+	export const Z_NEED_DICT: number;
+	export const Z_ERRNO: number;
+	export const Z_STREAM_ERROR: number;
+	export const Z_DATA_ERROR: number;
+	export const Z_MEM_ERROR: number;
+	export const Z_BUF_ERROR: number;
+	export const Z_VERSION_ERROR: number;
+	export const Z_NO_COMPRESSION: number;
+	export const Z_BEST_SPEED: number;
+	export const Z_BEST_COMPRESSION: number;
+	export const Z_DEFAULT_COMPRESSION: number;
+	export const Z_FILTERED: number;
+	export const Z_HUFFMAN_ONLY: number;
+	export const Z_RLE: number;
+	export const Z_FIXED: number;
+	export const Z_DEFAULT_STRATEGY: number;
+	export const Z_BINARY: number;
+	export const Z_TEXT: number;
+	export const Z_ASCII: number;
+	export const Z_UNKNOWN: number;
+	export const Z_DEFLATED: number;
+	export const Z_NULL: number;
+
+	export const ZLIB_VERSION: string;
+}

package.json

@@ -2,7 +2,8 @@
     "name": "zlib-sync",
     "version": "0.1.5",
     "description": "Synchronous zlib bindings for NodeJS",
-    "main": "index.js",
+	"main": "index.js",
+	"types": "index.d.ts",
     "scripts": {
         "lint": "eslint --fix test",
         "test": "mocha"
@@ -25,6 +26,7 @@
         "nan": "^2.14.0"
     },
     "devDependencies": {
+        "@types/node": "^12.11.7",
         "mocha": "^4.0.1"
     }
 }