bootstrap-vue/src/utils/clone-deep.js

With more than 85 components, over 45 available plugins, several directives, and 1000+ icons, BootstrapVue provides one of the most comprehensive implementations of the Bootstrap v4 component and grid system available for Vue.js v2.6, complete with extens

import { isArray, isPlainObject } from './inspect'
import { keys } from './object'

export const cloneDeep = (obj, defaultValue = obj) => {
  if (isArray(obj)) {
    return obj.reduce((result, val) => [...result, cloneDeep(val, val)], [])
  }
  if (isPlainObject(obj)) {
    return keys(obj).reduce(
      (result, key) => ({ ...result, [key]: cloneDeep(obj[key], obj[key]) }),
      {}
    )
  }
  return defaultValue
}