whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String? base,
    2. String? complete,
    3. String? empty,
    4. String? focus,
    5. String? invalid,
    6. bool? webkitAutofill,
    )?
)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? Function( String? base,  String? complete,  String? empty,  String? focus,  String? invalid,  bool? webkitAutofill)?  $default,) {final _that = this;
switch (_that) {
case _CardElementClasses() when $default != null:
return $default(_that.base,_that.complete,_that.empty,_that.focus,_that.invalid,_that.webkitAutofill);case _:
  return null;

}
}