This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
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 |