@feugene/mu/src/object/getSize.ts

Helpful TS utilities without dependencies

import isObject from '~/is/isObject'

/**
 * Returns count of properties of the object
 *
 * @param {object} object
 * @returns {int}
 */
export default function getSize(object: Record<PropertyKey, any>): number {
  if (!isObject(object)) {
    throw new Error('Param is not object')
  }

  let size = 0
  let property

  for (property in object) {
    if (Object.prototype.hasOwnProperty.call(object, property)) {
      size++
    }
  }

  return size
}