README updated

Author: Sachin Singh

CUSTOMIZE.md

@@ -0,0 +1,60 @@
+# Using existing HTML to build context menu
+
+You can use an existing DOM node as a reference to context menu.
+
+```html
+<ul class="context-menu">
+    <li>Item 1</li>
+    <li>Item 2</li>
+    <li>Item 3</li>
+    <li>Item 4</li>
+</ul>
+```
+
+```js
+import { ContextMenu } from '@scssyworks/context-builder';
+
+new ContextMenu(null, {
+    rootElement: document.querySelector('.context-menu')
+});
+```
+
+Existing DOM structure can readily be used as a context menu. However, you can add and customize elements at runtime.
+
+# Adding custom menu items dynamically
+
+```js
+import { ContextMenu, ContextItem } from '@scssyworks/context-builder';
+
+const contextMenu = new ContextMenu(null, {
+    rootElement: document.querySelector('.context-menu')
+});
+contextMenu.add(
+    new ContextItem('Item 5', {
+        rootElement: document.createElement('li')
+    });
+);
+```
+
+You can also insert a nested list to existing menu:
+
+```js
+import { ContextMenu, ContextItem, ContextList } from '@scssyworks/context-builder';
+
+const contextMenu = new ContextMenu(null, {
+    rootElement: document.querySelector('.context-menu')
+});
+contextMenu.add(
+    new ContextItem('Item 5', {
+        rootElement: document.createElement('li')
+    });
+    (new ContextList('Item 6', {
+        rootElement: document.createElement('li'),
+        listElement: document.createElement('ul') // This list will be used to insert nested li items
+    })).add(
+        new ContextItem('Child Item 1', {
+            rootElement: document.createElement('li')
+        })
+    )
+);
+```

README.md

@@ -1,6 +1,6 @@
 # Context Builder
 
-Build context menus with ease.
+A powerful and easy to use library for building custom context menus.
 
 ```sh
 npm i @scssyworks/context-builder
@@ -97,4 +97,6 @@ contextMenu.cleanup();
 
 # Customize
 
-Context Builder is fully customizable. You can use your own elements to build context menu. Use the following guide to customize your context menus:
+Context Builder is fully customizable. You can use your own elements to build context menu. Use the following guide to customize your context menus:
+
+https://github.com/scssyworks/context-builder/blob/master/CUSTOMIZE.md