FileList
An object of this type is returned by the files
property of the HTML <input>
element; this lets you access the list of files selected with the <input type="file">
element. It's also used for a list of files dropped into web content when using the drag and drop API; see the DataTransfer
object for details on this usage.
Note: Prior to Gecko 1.9.2, the input element only supported a single file being selected at a time, meaning that the FileList would contain only one file. Starting with Gecko 1.9.2, if the input element's multiple attribute is true, the FileList may contain multiple files.
Using the file list
All <input>
element nodes have a files
array on them which allows access to the items in this list. For example, if the HTML includes the following file input:
<input id="fileItem" type="file">
The following line of code fetches the first file in the node's file list as a File
object:
var file = document.getElementById('fileItem').files[0];
Method overview
File item(index); |
Properties
Attribute | Type | Description |
length |
integer |
A read-only value indicating the number of files in the list. |
Methods
item()
Returns a File
object representing the file at the specified index in the file list.
File item( index );
Parameters
index
- The zero-based index of the file to retrieve from the list.
Return value
The File
representing the requested file.
Example
This example iterates over all the files selected by the user using an input
element:
// fileInput is an HTML input element: <input type="file" id="myfileinput" multiple> var fileInput = document.getElementById("myfileinput"); // files is a FileList object (similar to NodeList) var files = fileInput.files; var file; // loop through files for (var i = 0; i < files.length; i++) { // get item file = files.item(i); //or file = files[i]; alert(file.name); }
Here is a complete example.
<!DOCTYPE HTML> <html> <head> </head> <body> <!--multiple is set to allow multiple files to be selected--> <input id="myfiles" multiple type="file"> </body> <script> var pullfiles=function(){ // love the query selector var fileInput = document.querySelector("#myfiles"); var files = fileInput.files; // cache files.length var fl=files.length; var i=0; while ( i < fl) { // localize file var in the loop var file = files[i]; alert(file.name); i++; } } // set the input element onchange to call pullfiles document.querySelector("#myfiles").onchange=pullfiles; //a.t </script> </html>
Specification
- File upload state (HTML5 working draft)
See also
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/filelist