diff --git a/generator.js b/generator.js
index 2788187..df5ad35 100644
--- a/generator.js
+++ b/generator.js
@@ -35,7 +35,7 @@ function run(gen) {
   _next()
 }
 */
-// run(mtGenerator)
+run(mtGenerator)
 
 function run(gen) {
   return new Promise((resolve, reject) => {
@@ -70,4 +70,4 @@ function* myGenerator() {
 }
 
 const result = run(myGenerator)     //result是一个Promise
-//输出 1 2 error
\ No newline at end of file
+//输出 1 2 error
diff --git "a/\345\244\232\346\226\207\344\273\266\344\270\212\344\274\240\346\265\213\350\257\225/index.html" "b/\345\244\232\346\226\207\344\273\266\344\270\212\344\274\240\346\265\213\350\257\225/index.html"
new file mode 100644
index 0000000..e8c9667
--- /dev/null
+++ "b/\345\244\232\346\226\207\344\273\266\344\270\212\344\274\240\346\265\213\350\257\225/index.html"
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Document</title>
+</head>
+<body>
+  <input type='file' id="file" multiple>
+  <button id="btn">上传</button>
+  <script>
+    var chunkSize=2*1024*1024
+    var file = document.getElementById('file'), btn = document.getElementById('btn')
+    var formData = new FormData()
+    btn.addEventListener('click', () => {
+     var fileItem = file.files[0]
+     var blob = fileItem.slice(0, chunkSize) 
+     console.log(blob)
+    })
+  </script>
+</body>
+</html>
\ No newline at end of file
