output_example.js

controller.setProperties({
  title: 'Hello World',
  slug: ''
  })

console.log(controller.get('validation'));
{
  title: {
    isPassed: true,
    value: 'Hello World'
  },
  slug: {
    isPassed: false,
    error: 'Slug can not be empty.'
  },
  isPassed: false
}