update README.js

Author: Cap32

README.md

@@ -1,5 +1,56 @@
 # tiny-querystring
 
+Tiny parsing and formatting URL query strings for Node.js and browser. (Only 430B only after gziped)
+
+
+## Installation
+
+##### NPM
+
+```bash
+npm install tiny-querystring
+```
+
+##### Yarn
+
+```bash
+yarn add tiny-querystring
+```
+
+##### 1998 Script Tag
+
+```html
+<script src="https://unpkg.com/tiny-querystring/dist/tiny-querystring.umd.js"></script>
+```
+
+## Usage
+
+### parse(str)
+
+Parses a URL query string (str) into a collection of key and value pairs.
+
+###### Example
+
+```js
+import { parse } from 'tiny-querystring';
+parse('foo=bar&abc=xyz&abc=123');
+/* returns { foo: 'bar', abc: ['xyz', '123'] } */
+```
+
+### stringify(obj)
+
+Produces a URL query string from a given obj by iterating through the object's "own properties".
+
+###### Example
+
+```js
+import { stringify } from 'tiny-querystring';
+stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' });
+
+/* returns 'foo=bar&baz=qux&baz=quux&corge=' */
+```
+
+
 ## License
 
 MIT