Demo: https://jsfiddle.net/emilrmoeller/3qLngvns/

PropTypesObjectChecker.js

const data = {
  title: 'hello world',
  endTime: 123456,
  foo: [1, 2, 3]
};

const properties = {
  title: 'string',
  endTime: 'number',
  foo: 'array'
};

/**
 * Has prop types checker
 * Checks if necessary keys and types are present in object.
 * the object can contain more keys than the ones being checked for.
 *
 * @param obj
 * @param expected - {key: 'string|boolean|object|array|number|symbol|function'}
 * @return {boolean}
 */
const hasPropTypes = (obj, expected) => {
  if (typeof obj !== 'object' || obj === null) {
    return false;
  };
   
  return Object.keys(expected).every(key => {
    if (!obj.hasOwnProperty(key)) {
    	return false;
    }

    switch (expected[key]) {
    	case 'array':
      	return Array.isArray(obj[key]);

      default:
      	return typeof obj[key] === expected[key]
    }
  });
};

console.log(hasPropTypes(data, properties));