docs: readme

Author: phphe

README.md

@@ -1,10 +1,21 @@
-<p align="center"><img src="https://github.com/phphe/he-tree-react/blob/static/cover.jpg?raw=true" width="700" alt="react draggable tree, he-tree-react" /></p>
+<p align="center"><img src="https://github.com/phphe/he-tree-react/blob/static/cover.jpg?raw=true" width="350" alt="react draggable tree, he-tree-react" /></p>
 
-# he-tree-react ![GitHub License](https://img.shields.io/github/license/phphe/he-tree-react) ![NPM Version](https://img.shields.io/npm/v/he-tree-react)
+# he-tree-react ![GitHub License](https://img.shields.io/github/license/phphe/he-tree-react) ![NPM Version](https://img.shields.io/npm/v/he-tree-react) ![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/phphe/he-tree-react/build.yml) ![NPM Type Definitions](https://img.shields.io/npm/types/he-tree-react) ![npm bundle size](https://img.shields.io/bundlephobia/minzip/he-tree-react)
 
-React draggable sortable tree component. [Document](https://he-tree-react.phphe.com).
+React draggable sortable tree component. [Document](https://he-tree-react.phphe.com), [Demo](https://he-tree-react.phphe.com/v1/examples).
 
-React 可拖拽树组件. [文档](https://he-tree-react.phphe.com/zh).
+React 可拖拽树组件. [文档](https://he-tree-react.phphe.com/zh), [演示](https://he-tree-react.phphe.com/zh/v1/examples).
+
+## Features
+
+- Drag with a customizable placeholder.
+- Based on HTML Drag and Drop API.
+- Both flat data and tree-shaped data supported.
+- Drag from external.
+- Open or expand. Open node when drag onto it.
+- Checked, semi-checked.
+- Big data, virtual list.
+- Examples for update data.
 
 ## Changelog