include mime type in getFile

scripts/test.ts

@@ -7,8 +7,8 @@ const writable = await file_handle.createWritable()
 writable.write('Hello World!')
 writable.close()
 const file = await file_handle.getFile()
-const file_text = await file.text()
-console.log(file_text)
+console.log(file.type)
+console.log(await file.text())
 const result = await cwd_directory_handle.getFileHandle('test/test.txt').catch(error => 'blocked path traversal')
 if (typeof result === 'string') console.log(result)
 else console.error('path traversal not blocked')

src/NodeFileSystemFileHandle.ts

@@ -3,6 +3,7 @@ import * as asyncfs from 'node:fs/promises';
 import * as path from 'node:path';
 import NodeFileSystemHandle from './NodeFileSystemHandle.js';
 import NodeFileSystemWritableFileStream from './NodeFileSystemWriteableFileStream.js';
+import mime from 'mime'
 
 export default class NodeFileSystemFileHandle extends NodeFileSystemHandle implements FileSystemFileHandle {
     declare kind: "file";
@@ -18,7 +19,8 @@ export default class NodeFileSystemFileHandle extends NodeFileSystemHandle imple
     }
     async getFile(): Promise<File> {
         const stats = await asyncfs.stat(this.path)
-        return asyncfs.readFile(this.path).then(buffer => Object.assign(new Blob([buffer]), {
+        const type = mime.getType(this.name.split('.').pop())
+        return asyncfs.readFile(this.path).then(buffer => Object.assign(new Blob([buffer],{type}), {
             lastModified: stats.mtimeMs,
             name: this.path,
             webkitRelativePath: this.path