JSFiddle - React, Tailwind, and code Playground

JavaScript

var data = {
  'errors': {
    'user': {
      'name': 'empty',
      'length': 'exceeds'
    },
    'title': {
      'name': 'empty',
      'length': 'exceeds'
    }
  }
}

var out = Object.keys(data.errors).reduce(function (p, c) {
  return p.concat([data.errors[c].name, data.errors[c].length]);
}, []);

console.log(out)