Web/API/Metadata

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The Metadata interface is used by the File and Directory Entries API to contain information about a file system entry. This metadata includes the file's size and modification date and time.

This interface isn't available through the global scope; instead, you obtain a Metadata object describing a FileSystemEntry using the method FileSystemEntry.getMetadata().

Properties

modificationTime Read only

A Date object indicating the date and time the entry was modified.

size Read only

A 64-bit unsigned integer indicating the size of the entry in bytes.

Specifications

Specification	Status	Comment
File and Directory Entries API	Draft	Draft of proposed API

This API has no official W3C or WHATWG specification.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
Metadata Experimental'Non-standard'	Chrome Full support 13 Prefixed' Full support 13 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support ≤79 Prefixed' Full support ≤79 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support Yes Prefixed' Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes Prefixed' Full support Yes Prefixed' Prefixed' Implemented with the vendor prefix: webkit
modificationTime Experimental'Non-standard'	Chrome Full support 13	Edge Full support ≤79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support Yes	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes
size Experimental'Non-standard'	Chrome Full support 13	Edge Full support ≤79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android Full support Yes	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

No support  

No support

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

Non-standard. Expect poor cross-browser support.'

Non-standard. Expect poor cross-browser support.

Requires a vendor prefix or different name for use.'

Requires a vendor prefix or different name for use.

See also

• File and Directory Entries API
• Introduction to the File System API
• FileSystemEntry
• FileSystemFileEntry and FileSystemDirectoryEntry

Metadata by Mozilla Contributors is licensed under CC-BY-SA 2.5.