update doc

Author: hy16657

README.md

@@ -8,6 +8,30 @@
 - 删除了所有非核心代码，仅关注 XML 的解析过程；
 - 输出 JSON 格式的解析结果；
 
+# 安装
+> npm install pptxtojson
+
+# 用法
+```html
+<input type="file" accept="application/vnd.openxmlformats-officedocument.presentationml.presentation"/>
+```
+
+```js
+import { parse } from 'pptxtojson/dist/index.esm'
+
+document.querySelector('input').addEventListener('change', evt => {
+	const file = evt.target.files[0]
+	
+	const reader = new FileReader()
+	reader.onload = async e => {
+		const json = await pptxtojson.parse(e.target.result)
+		console.log(json)
+	}
+	reader.readAsArrayBuffer(file)
+})
+```
+
+
 # 📄 开源协议
 GPL-3.0 LICENSE © [pipipi-pikachu](https://github.com/pipipi-pikachu)
 

index.html

@@ -75,6 +75,7 @@
 			text-align: center;
 			cursor: pointer;
 			user-select: none;
+			margin-bottom: 20px;
 		}
 		.upload-input {
 			display: none;
@@ -88,6 +89,8 @@
 			点击上传 .pptx 文件
 			<input class="upload-input" type="file" accept="application/vnd.openxmlformats-officedocument.presentationml.presentation"/>
 		</div>
+
+		<a href="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/pipipi-pikachu/pptx2json">Github</a>
 	</div>
 	<div id="jsoneditor"></div>