Add types and gitignore

.gitignore

@@ -0,0 +1,2 @@
+node_modules
+package-lock.json

package.json

@@ -3,6 +3,7 @@
   "version": "1.0.16",
   "description": "An exceptionally fast, thorough and tiny unused-CSS cleaner",
   "main": "./dist/dropcss.cjs.js",
+  "types": "./src/types.d.ts",
   "scripts": {
     "build": "rollup -c",
     "test": "nyc mocha test/src/*.js",

src/types.d.ts

@@ -0,0 +1,11 @@
+export interface DropcssOptions {
+    html: string;
+    css: string;
+
+    shouldDrop?: (selector: string) => boolean;
+    didRetain?: (selector: string) => void;
+
+    keepText?: boolean;
+}
+
+export default function dropcss(options: DropcssOptions): { css: string };