Added type declarations for 'jpeg-js'.

types/jpeg-js/index.d.ts

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+// Type definitions for jpeg-js 0.3
+// Project: https://github.com/eugeneware/jpeg-js#readme
+// Definitions by: Daniel Rosenwasser <https://github.com/DanielRosenwasser>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+export interface RawImageData<D extends Uint8Array> {
+    data: D;
+    width: number;
+    height: number;
+}
+
+export function decode(jpegData: ArrayLike<number> | Iterable<number> | ArrayBuffer, useTypedArray: true): RawImageData<Uint8Array>;
+export function decode(jpegData: ArrayLike<number> | Iterable<number> | ArrayBuffer, useTypedArray?: false): RawImageData<Buffer>;
+export function decode(jpegData: ArrayLike<number> | Iterable<number> | ArrayBuffer, useTypedArray: boolean): RawImageData<Uint8Array | Buffer>;
+
+export function encode(imgData: RawImageData<Uint8Array | Buffer>, qu?: number): RawImageData<Buffer>;

types/jpeg-js/jpeg-js-tests.ts

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+/// <reference types="node" />
+
+import fs = require("fs");
+import jpeg = require("jpeg-js");
+
+const x = fs.readFileSync("hello.jpg");
+const decoded = jpeg.decode(x, true);
+
+const { width, height } = decoded;
+
+width;          // $ExpectType number
+height;         // $ExpectType number
+decoded.data;   // $ExpectType Uint8Array
+
+fs.writeFileSync("re-encoded.jpg", jpeg.encode({
+    width, height, data: decoded.data
+}, 50));

types/jpeg-js/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es2015"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "jpeg-js-tests.ts"
+    ]
+}

types/jpeg-js/tslint.json

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+{ "extends": "dtslint/dt.json" }