External module "assert/instance-of/docs/types/index.d"

Export assignment instanceOf

• instanceOf(value: any, constructor: Function): boolean

• Tests whether a value has in its prototype chain a specified constructor as a prototype property.

  throws

  constructor must be callable

  Parameters

  • value: any

    value to test

  • constructor: Function

    constructor to test against

  Returns boolean

  boolean indicating whether a value is an instance of a provided constructor

  Example

  var bool = instanceOf( [], Array );
  // returns true

  Example

  var bool = instanceOf( {}, Object ); // exception
  // returns true

  Example

  var bool = instanceOf( 'beep', String );
  // returns false

  Example

  var bool = instanceOf( null, Object );
  // returns false

  Example

  var bool = instanceOf( 5, Object );
  // returns false