nodejs: check file existence and read it (text file)

Is this a good way to check file existence and read it (it's a textfile)? People seems to use fs.stat but in the documentation it recommends to use open.

var fs       = require('fs');
var readline = require('readline');

var filer = "aaa.bat";

var sr = fs.open(filer, 'r', function(err, fd) {
    if (err) {
        console.log(err);
        return;
    }

    var rl = readline.createInterface({
        input: fs.createReadStream(filer, { fd: fd })
    });

    rl.on('line', function(data) {
        console.log(data);
    });

    rl.on('close', function() {
    });
});

via user8069579