File

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File

W3C Working Draft

Summary

The File object provides information about files stored on the user's computer, and access to their contents. These are generally retrieved from a FileList object returned when a user selects files using the input element, or from a drag-and-drop operation's DataTransfer object.


Properties

API Name Summary
lastModifiedDate The last modified date of the file. On getting, if user agents can make this information available, this must return a new Date object initialized to the last modified date of the file. If the last modification date and time are not known, the attribute must return the current date and time as a Date object.
name The name of the file; on getting, this must return the name of the file as a string. There are numerous file name variations on different systems; this is merely the name of the file, without path information. On getting, if user agents cannot make this information available, they must return the empty string.


Methods

No methods.

Events

No events.

Examples

Using form input for selecting files

JavaScript

function handleFileSelect(evt) {
    var files = evt.target.files; // FileList object

    // files is a FileList of File objects. List some properties.
    var output = [];
    for (var i = 0, f; f = files[i]; i++) {
      output.push(escape(f.name),
                  f.size, ' bytes, last modified: ',
                  f.lastModifiedDate ? f.lastModifiedDate.toLocaleDateString() : 'n/a');
    }
    document.getElementById('list').innerHTML = output.join();
  }

  document.getElementById('files').addEventListener('change', handleFileSelect, false);



Related specifications

Specification Status Related Changes
W3C File API Specification W3C Working Draft

Compatibility

Desktop

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic Support 22.0
15.0
10.0
12.1
6.0

Mobile

Feature Android BlackBerry Chrome for mobile Firefox Mobile (Gecko) IE Mobile Opera Mobile Opera Mini Safari Mobile
Basic Support 3.0
10.0
?
?
?
?
Unsupported
6.0

Attribution

This article contains content originally from external sources.

Portions of this content come from the Microsoft Developer Network: Windows Internet Explorer API reference Article

Portions of this content come from HTML5Rocks! article