Module is/undefined

isUndefined

• isUndefined(test: any): test is undefined

• Checks if test is undefined.

  example

   isUndefined(void 0);  //=> true
   isUndefined(null);    //=> false
  

  Parameters

  • test: any

    The value to check.

  Returns test is undefined

  Returns true if value is undefined, else false.