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 read-only size
property of the Metadata
interface specifies the size, in bytes, of the referenced file or other file system object on disk.
Syntax
var size = Metadata.size;
Value
A number indicating the size of the file in bytes.
Example
This example checks the size of a log file and removes it if it's larger than a megabyte.
workingDirectory.getFile("log/important.log", {}, function(fileEntry) { fileEntry.getMetadata(function(metadata) { if (metadata.size > 1048576) { fileEntry.remove(function() { /* log file removed; do something clever here */ }); } }); }, handleError);
Specifications
Specification | Status | Comment |
---|---|---|
File and Directory Entries API The definition of 'size' in that specification. |
Editor's Draft | Initial specification. |
This API has no official W3C or WHATWG specification.
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 13 webkit | No support | No support | No support | No support |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | No support | 0.16 webkit | No support | No support | No support | No support |