Is there any way to execute 'cls' from node.js?

Trying to clear the command prompt buffer on windows from node.js.

This is what i'm trying that's not working:

var exec = require('child_process').exec;
    var child = exec('cls', function(err, stdout, stderr) {
        if (err) throw err;
    });

It still accumulates a scroll bar, which displeases me. It doesn't appear that CLS is ever really executed. If I replace cls with ls, it'll show a list of files though.