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Metadata

This is an experimental technology
Check 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 compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	13 Prefixed 13 Prefixed Prefixed Requires the vendor prefix: webkit	?	No	No	No	No
`modificationTime`	13	?	No	No	No	No
`size`	13	?	No	No	No	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	No	Yes Prefixed Yes Prefixed Prefixed Requires the vendor prefix: webkit	?	No	No	No	?
`modificationTime`	No	Yes	?	No	No	No	?
`size`	No	Yes	?	No	No	No	?

Metadata

Properties

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also