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 read-only modificationTime
property of the Metadata
interface is a Date
object which specifies the date and time the file system entry (or the data referenced by the entry) was last modified.A file system entry is considered to have been modified if the metadata or the contents of the referenced file (or directory, or whatever other kind of file system entry might exist on the platform in use) has changed.
Syntax
var modificationTime = Metadata.modificationTime;
Value
A Date
timestamp indicating when the file system entry was last changed.
Example
This example tries to get a particular working file at tmp/workfile.json
. Once that file has been found, its metadata is obtained and the file's modification timestamp year is compared to the current year. If it was last modified in a year at least five prior to the current year, the file is removed and a new one is created.
workingDirectory.getFile("tmp/workfile.json", { create: true }, function(fileEntry) { fileEntry.getMetadata(function(metadata) { if ((new Date().getFullYear() - metadata.modificationTime.getFullYear()) >= 5) { fileEntry.remove(function() { workingDirectory.getFile("tmp/workfile.json", { create: true }, function(newEntry) { fileEntry = newEntry; }); }); } }); }, handleError);
This API has no official W3C or WHATWG specification.
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
modificationTime | 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.