feat: add typescript declaration file for ImgixClient (#64)

package.json

@@ -5,14 +5,17 @@
   "repository": "https://github.com/imgix/imgix-core-js",
   "scripts": {
     "assert_version": "node assert_version.js",
-    "compile": "mkdir -p dist && uglifyjs ./src/imgix-core-js.js -o ./dist/imgix-core-js.min.js && cp ./src/imgix-core-js.js ./dist/imgix-core-js.js",
+    "compile": "mkdir -p dist && uglifyjs ./src/imgix-core-js.js -o ./dist/imgix-core-js.min.js && cp ./src/imgix-core-js.js ./dist/imgix-core-js.js && cp ./src/imgix-core-js.d.ts ./dist/imgix-core-js.d.ts && tsc",
     "prepublish": "npm run compile && npm run assert_version",
     "test": "mocha"
   },
   "main": "dist/imgix-core-js.js",
+  "types": "dist/imgix-core-js.d.ts",
   "dependencies": {
     "js-base64": "^2.1.9",
-    "md5": "^2.2.1"
+    "md5": "^2.2.1",
+    "typescript": "^3.6.3",
+    "@types/node": "^12.7.8"
   },
   "license": "BSD-2-Clause",
   "devDependencies": {

src/imgix-core-js.d.ts

@@ -0,0 +1,20 @@
+// Type definitions for imgix-core-js.js
+
+declare class ImgixClient {
+    domain: string;
+    useHTTPS: boolean;
+    includeLibraryParam: boolean;
+    secureURLToken: string;
+
+    constructor(opts: {domain: string; secureURLToken?: string; useHTTPS?: boolean; includeLibraryParam?: boolean;});
+
+
+    buildURL(path: string, params?: {}): string;
+    _sanitizePath(path: string): string;
+    _buildParams(params: {}): string;
+    _signParams(path: string, queryParams?: {}): string;
+    buildSrcSet(path: string, params?: {}): string;
+    _buildSrcSetPairs(path: string, params?: {}): string;
+    _buildDPRSrcSet(path: string, params?: {}): string;
+}
+export = ImgixClient;

tsconfig.json

@@ -0,0 +1,12 @@
+{
+    "compilerOptions": {
+        "target": "es2015",
+        "module": "umd",
+        "types": [
+            "node"
+         ]
+    },
+    "files": [
+        "src/imgix-core-js.d.ts"
+    ]
+}