@fgv/ts-web-extras/docs/ts-web-extras.filetreehelpers.fromfilelist.md

Browser-compatible utilities and FileTree implementations

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [@fgv/ts-web-extras](./ts-web-extras.md) &gt; [FileTreeHelpers](./ts-web-extras.filetreehelpers.md) &gt; [fromFileList](./ts-web-extras.filetreehelpers.fromfilelist.md)

## FileTreeHelpers.fromFileList() function

Helper function to create a new FileTree instance from a browser FileList (e.g., from input\[type="file"\]).

**Signature:**

```typescript
export declare function fromFileList(fileList: FileList, params?: FileTree.IFileTreeInitParams<string>): Promise<Result<FileTree.FileTree<string>>>;
```

## Parameters

<table><thead><tr><th>

Parameter


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

fileList


</td><td>

FileList


</td><td>

FileList from a file input element


</td></tr>
<tr><td>

params


</td><td>

FileTree.IFileTreeInitParams&lt;string&gt;


</td><td>

_(Optional)_ Optional `IFileTreeInitParams` for the file tree.


</td></tr>
</tbody></table>

**Returns:**

Promise&lt;Result&lt;FileTree.FileTree&lt;string&gt;&gt;&gt;

Promise resolving to a successful Result with the new FileTree instance if successful, or a failed Result with an error message otherwise

## Remarks

The content type of the files is always `string` and the default accept contentType function (`FileTree.FileItem.defaultAcceptContentType`<!-- -->) is used, so content type is derived from the mime type of the file, when available.