var s = new Steady({
  conditions: {
    "width": 400,
    "min-top": 50,
    "max-bottom": 200
  },
  throttle: 100,
  handler: fn
});

 
function fn(values, done) {
  console.log('conditions are met!');
  done();
}

s.stop();

setTimeout(function() {
  s.resume();
}, 200);