thanks Katryn

.eslintrc.js

@@ -6,12 +6,15 @@ module.exports = {
   },
   plugins: ['@typescript-eslint'],
   extends: [
-  "eslint:recommended",
+    "eslint:recommended",
     "plugin:@typescript-eslint/eslint-recommended",
     "plugin:@typescript-eslint/recommended"
   /*,"prettier",
     "prettier/@typescript-eslint"*/
   ],
+  rules: {
+    '@typescript-eslint/no-inferrable-types': 1
+  },
   /*
   env: {
     browser: true,

README.md

@@ -15,17 +15,10 @@ _random emoji function with zero dependencies_
 
 ```bash
 $ yarn add @0xadada/random-emoji
-$ node
-> const random = require('@0xadada/random-emoji');
-> random()
-'😁'
-let a = random();  // defaults to 'emoticons'
-let b = random('emoticons');
-let c = random('food');
-let d = random('animals');
-let e = random('expressions');
-console.log(a, b, c, d, e);
-// 😍 🙄 🍗 🐥 🤢
+$ npm run -s start
+> 🙄
+$ npm run -s start
+> 😜
 ```
 
 

package.json

@@ -12,11 +12,12 @@
   },
   "scripts": {
     "coverage": "npx nyc report --reporter=text-lcov | yarn coveralls",
-    "build": "npx tsc --outFile lib/index.js src/index.ts",
+    "build": "npx tsc",
     "lint": "npx eslint .",
     "lint:fix": "npx eslint . --fix",
     "test": "npm run build && npx nyc ava",
-    "prepublish": "npm run build && npm run test"
+    "prepublish": "npm run build && npm run test",
+    "start": "npm run build && node -e \"let { default: r } = require('./lib/index'); console.log(r('food'));\""
   },
   "devDependencies": {
     "@babel/cli": "^7.6.4",

src/index.ts

@@ -1,14 +1,21 @@
+interface NamedCharRange {
+  emoticons: string;
+  food: string;
+  animals: string;
+  expressions: string;
+}
+
 const CHAR_RANGE = {
   emoticons: [0x1f600, 0x1f64f],
   food: [0x1f32d, 0x1f37f],
   animals: [0x1f400, 0x1f4d3],
   expressions: [0x1f910, 0x1f92f]
 };
 
-const random = function(range = 'emoticons'): string {
+const random = function(range: keyof NamedCharRange = 'emoticons'): string {
   const [max, min] = CHAR_RANGE[range];
   const codePoint = Math.floor(Math.random() * (max - min) + min);
   return String.fromCodePoint(codePoint);
 };
 
-module.exports = random;
+export default random;