updated readme, license

README.md

@@ -1,2 +1,79 @@
 # notification
-Notification is a Javascript library for pop-up messages on a web page. does not require any dependencies such as jQuery
+**Pop-up notifications** is a Javascript library for pop-up messages on a web page. Pure javascript and css, any dependencies.
+
+## Installation
+Download files, then:
+1. Link to notification.css `<link href="path/to/notification.css" rel="stylesheet"/>`
+
+2. Link to notification.js `<script src="path/to/notification.js"></script>`
+
+## Usage
+### options
+position <string> - can have such values : 
+  top-right //default value
+  bottom-right
+  top-left
+  bottom-left
+  center
+duration <integer> time in milliseconds the notification will be displayed
+  default 4000
+
+```
+const popup = Notification({
+  position: 'top-left',
+  duration: 7000
+});
+```  
+
+### notification type 
+  info
+  success
+  warning
+  error
+  dialog 
+
+### Info notification 
+```
+popup.info({
+  title: 'Info',
+  message: 'Info message'
+});
+```  
+
+### Success notification  
+```
+popup.success({
+  title: 'Success',
+  message: 'Success message'
+});
+```  
+
+### Warning notification  
+```
+popup.warning({
+  title: 'Warning',
+  message: 'Warning message'
+});
+```
+
+### Error notification  
+```
+popup.error({
+  title: 'Error',
+  message: 'Error message'
+});
+```
+
+### Confirmation Dialog
+If use "Confirmation dialog" two buttons are available [Ok] and [Cancel].
+The display time of the notification will not matter here, even if it has been set.
+The third parameter is a callback function that is called when any of the buttons is pressed.
+```
+popup.dialog({
+  title: 'Confirm',
+  message: 'Confirm message',
+  (result) => {
+    console.log('result = ', result)
+  }
+});
+```