readme update

Author: naimmalek

README.md

@@ -1,5 +1,47 @@
-This example was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+# reactjs-qrcode-generator
 
-It is linked to the reactjs-qrcode-generator package in the parent directory for development purposes.
+> reactjs-qrcode-generator is a clean and simple QRcode generator library for reactJS.
 
-You can run `npm install` and then `npm start` to test your package.
+[![NPM](https://img.shields.io/npm/v/reactjs-qrcode-generator.svg)](https://www.npmjs.com/package/reactjs-qrcode-generator) [![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com)
+
+## Install
+
+```bash
+npm install --save reactjs-qrcode-generator
+```
+
+## Usage
+
+```tsx
+import React, { Component } from 'react'
+
+import ReactQrcode from 'reactjs-qrcode-generator'
+
+class Example extends Component {
+  render() {
+    return <ReactQrcode qrvalue={qrvalue} size={size} level={1} />
+  }
+}
+```
+
+## Parameters
+
+| Attribute        | Type           | Default | Description  |
+| ------------- |-------------| -----|------------|
+| level | Number | 1    | QR ECC level (1, 2, 3, 4) |
+| qrvalue      | String | This is Qrcode | Your String |
+| size      | Number | 200     | (Width/Height value) |
+
+### Ecc level description
+
+| Level        | Description  |
+| -------------|------------  |
+| 1            | low          |
+| 2            | medium       |
+| 3            | quartile     |
+| 4            | high         |
+
+
+## License
+
+MIT © [naimmalek](https://github.com/naimmalek)