fs.watch fired twice when I change the watched file

Question

 fs.watch( 'example.xml', function ( curr, prev ) {    // on file change we can read the new xml    fs.readFile( 'example.xml','utf8', function ( err, data ) {      if ( err ) throw err;      console.dir(data);      console.log('Done');    });  }); 

OUTPUT:

• some data
• Done X 1
• some data
• Done X 2

It is my usage fault or ..?

Answer 1

The fs.watch api:

1. is unstable
2. has known "behaviour" with regards repeated notifications. Specifically, the windows case being a result of windows design, where a single file modification can be multiple calls to the windows API