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Main module - validate()

import { validate } from 'tn-validate'

const value: any
const criteria: Criterion[]

validate(value, ...criteria)

Singular Modules

Better TypeScript Support with singular modules

• isJson()
• isNull()
• isArray()
• isRegExp()
• isObject()
• isDate()
• isString()
• isNumber()
• isBoolean()
• isFunction()
• isUndefined()
• isValidDate()
• isNumString()
• isArrObject()
• isNullUndefined()

Type Criterion

type CustomValidator = (value: number) => boolean

type Criterion =
  | 'string'
  | StringConstructor
  | 'number'
  | NumberConstructor
  | 'boolean'
  | BooleanConstructor
  | 'function'
  | FunctionConstructor
  | 'array'
  | ArrayConstructor
  | 'object'
  | ObjectConstructor
  | 'regexp'
  | RegExpConstructor
  | 'date'
  | DateConstructor
  | 'valid-date'
  | 'json'
  | 'null'
  | 'undefined'
  | RegExp
  | CustomValidator

Examples

validate('any') // always true
validate('string', String)
validate('school', String, Boolean)
validate(50, Number, (val) => val > 0 && val < 100)
validate('{}', 'json')
validate(/^\w+$/, RegExp)
validate('foo-bar', /^foo-.+/)