bootstrap-vue/src/utils/inspect.js

BootstrapVue, with over 40 plugins and more than 80 custom components, custom directives, and over 300 icons, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated WAI-AR

import { isArray } from './array'
import { isObject, isPlainObject } from './object'
import { File } from './safe-types'

// --- Convenience inspection utilities ---

export const toType = val => typeof val

export const toRawType = val => Object.prototype.toString.call(val).slice(8, -1)

export const toRawTypeLC = val => toRawType(val).toLowerCase()

export const isUndefined = val => val === undefined

export const isNull = val => val === null

export const isEmptyString = val => val === ''

export const isUndefinedOrNull = val => isUndefined(val) || isNull(val)

export const isUndefinedOrNullOrEmpty = val => isUndefinedOrNull(val) || isEmptyString(val)

export const isFunction = val => toType(val) === 'function'

export const isBoolean = val => toType(val) === 'boolean'

export const isString = val => toType(val) === 'string'

export const isNumber = val => toType(val) === 'number'

export const isPrimitive = val => isBoolean(val) || isString(val) || isNumber(val)

export const isDate = val => val instanceof Date

export const isEvent = val => val instanceof Event

export const isFile = val => val instanceof File

export const isRegExp = val => toRawType(val) === 'RegExp'

export const isPromise = val =>
  !isUndefinedOrNull(val) && isFunction(val.then) && isFunction(val.catch)

// Extra convenience named re-exports
export { isArray, isObject, isPlainObject }