Flutter Enhancer

A huge set of Flutter utilities and extensions to make your development easier.

This package utilizes several extensions from the following open source repository in a slightly modified or completely unchanged state. This is an improved, curated and published version to make these and other useful extensions more accessible.

Usage

Since it would still be an essay to write a concise usage guide for all 141 extensions, each one has an example usage in their documentation comments (///).

Extensions

Async Extensions

Extension on	Method/Property	Returns	Description
T? Function()	callWhen()	T?	Conditionally call a function based on a predicate
T? Function()	debounce()	void	Debounce function execution with configurable duration
T? Function()	periodic()	Timer	Create periodic timers for repeated function calls
T? Function()	throttle()	void	Throttle function execution to limit call frequency
T Function()	delayedCall()	Future<T>	Execute a function after a delay
Future<T>	onErrorJustReturn()	Future<T>	Return a default value on error
Future<T?>	drainErrorsAll()	Future<T?>	Return null on error for any Future type
Future<T?>	drainErrorsNullable()	Future<T?>	Return null on error for nullable Futures
Future<T?>	unwrapWith()	Future<T>	Unwrap nullable futures with alternative values
Stream<T>	bufferedStreamUntilFirstListener	Stream<T>	Buffer events until first listener subscribes
Stream<T>	onErrorFinishWith()	Stream<T>	Complete stream on first error with optional final value
Stream<T>	takeFor()	Stream<T>	Take events for a specified duration
Stream<T>	withTimeoutBetweenEvents()	Stream<T>	Add timeout detection between stream events
Stream<T?>	unwrap()	Stream<T>	Filter out null values from streams

Base Types

Extension on	Method/Property	Returns	Description
Color	avg()	Color	Get average color between two colors
Color	darken()	Color	Darken a color by percentage
Color	lighten()	Color	Lighten a color by percentage
DateTime	addDays()	DateTime	Add days to a date
DateTime	addHours()	DateTime	Add hours to a date
DateTime	addMonths()	DateTime	Add months to a date
DateTime	addYears()	DateTime	Add years to a date
DateTime	firstDayOfMonth	DateTime	Get first day of the month
DateTime	isFirstDayOfMonth	bool	Check if date is first day of month
DateTime	isLastDayOfMonth	bool	Check if date is last day of month
DateTime	isSameDay()	bool	Check if two dates are the same day
DateTime	isSameDayOrAfter()	bool	Check if the other date is the same day or after this
DateTime	isSameDayOrBefore()	bool	Check if the other date is the same day or before this
DateTime	isSameMonth()	bool	Check if two dates are in the same month
DateTime	isSameWeek()	bool	Check if two dates are in the same week
DateTime	isToday	bool	Check if date is today
DateTime	isTodayOrBefore	bool	Check if date is today or before
DateTime	isTodayOrAfter	bool	Check if date is today or after
DateTime	isTomorrow	bool	Check if date is tomorrow
DateTime	isYesterday	bool	Check if date is yesterday
DateTime	lastDayOfMonth	DateTime	Get last day of the month
DateTime	nextDay	DateTime	Get next day
DateTime	nextHour	DateTime	Get next hour
DateTime	nextMonth	DateTime	Get next month
DateTime	nextWeek	DateTime	Get next week
DateTime	nextYear	DateTime	Get next year
DateTime	previousDay	DateTime	Get previous day
DateTime	previousHour	DateTime	Get previous hour
DateTime	previousMonth	DateTime	Get previous month
DateTime	previousWeek	DateTime	Get previous week
DateTime	previousYear	DateTime	Get previous year
int	days	Duration	Convert integer to Duration in days
int	hours	Duration	Convert integer to Duration in hours
int	millis	Duration	Convert integer to Duration in milliseconds
int	minutes	Duration	Convert integer to Duration in minutes
int	rangeTo()	Iterable<int>	Generate iterable range between two integers
int	seconds	Duration	Convert integer to Duration in seconds
num	isDouble	bool	Check if number is a double
num	isInteger	bool	Check if number is an integer
num	isNegative	bool	Check if number is negative
num	isNegativeOrZero	bool	Check if number is negative or zero
num	isPositive	bool	Check if number is positive
num	isPositiveOrZero	bool	Check if number is positive or zero
num	isZero	bool	Check if number is zero
String	hardcoded	String	Mark string as hardcoded for localization tracking
String?	capitalized	String	Capitalize first letter, lowercase rest
String?	getReadTime()	int	Estimate read time in minutes
String?	hasMatch()	bool	Check if string matches regex pattern
String?	isAlphabetOnly()	bool	Check if string contains only letters
String?	isBlank	bool	Check if string is null, empty, or whitespace
String?	isBool()	bool	Check if string is 'true' or 'false'
String?	isNumericOnly()	bool	Check if string contains only numbers
String?	onlyLatin	String	Remove non-Latin characters
String?	reversed	String?	Reverse the string
String?	wordCount	int	Count words in string

Iterables

Extension on	Method/Property	Returns	Description
Iterable<T>	addAllByAvoidingDuplicates()	Iterable<T>	Add items avoiding duplicates
Iterable<T>	containsDuplicates	bool	Check if iterable has duplicates
Iterable<T>	duplicates	Iterable<T>	Get only duplicate elements
Iterable<T>	flatten()	Iterable<T>	Flatten nested iterable structures
Iterable<T>	groupBy()	Map<K, Iterable<T>>	Group elements by a key function
Iterable<T>	mapList()	List<E>	Map iterable to list in one step
Iterable<T>	mapWithIndex()	Iterable<E>	Map with index information
Iterable<T>	numberOfDuplicates	int	Count duplicate elements
Iterable<T>	operator +	Iterable<T>	Append single element
Iterable<T>	operator -	Iterable<T>	Remove element from iterable
Iterable<T>	uniques	Iterable<T>	Get only unique elements
Iterable<T>	without()	Iterable<T>	Remove specific element
Iterable<T>	withoutIterable()	Iterable<T>	Remove multiple elements

Lists

Extension on	Method/Property	Returns	Description
List<T>	addAllByAvoidingDuplicates()	void	Add items avoiding duplicates (in-place)
List<T>	compactMap()	List<E>	Map and filter out null values
List<T>	containsDuplicates	bool	Check if list has duplicates
List<T>	duplicates	List<T>	Get duplicate elements
List<T>	isEqualTo()	bool	Compare lists for ordered equality
List<T>	isEqualToUnordered()	bool	Compare lists ignoring order
List<T>	merge()	List<T>	Merge lists with optional uniqueness
List<T>	numberOfDuplicates	int	Count duplicate elements
List<T>	removeDuplicates()	void	Remove duplicates in-place
List<T>	splice()	Iterable<T>	Remove and insert elements at positions
List<T>	toMap()	Map<T, E>	Convert list to map with value mapping
List<T>	uniques	List<T>	Get only unique elements
List<T extends num>	divided	T	Divide first element by rest
List<T extends num>	max	T	Get maximum value
List<T extends num>	min	T	Get minimum value
List<T extends num>	multiplied	T	Multiply all elements together
List<T extends num>	subtractOthersFromFirst	T	Subtract rest from first element
List<T extends num>	sum	T	Sum all elements
List<T?>	whenAll()	T?	Execute callback when all non-null
List<T?>?	unwrap()	List<T>	Unwrap nullable lists and filter nulls

Maps

Extension on	Method/Property	Returns	Description
Map<K, V>	filter()	Iterable<MapEntry<K, V>>	Filter map entries with predicates
Map<K, V>	isEqualTo()	bool	Compare maps ignoring entry order
Map<K, V>	mappedKeys()	Map<R, V>	Map keys to new values
Map<K, V>	mappedValues()	Map<K, R>	Map values to new values
Map<K, V>	merge()	Map<K, V>	Merge maps with value overwriting
Map<K, V>	operator +	Map<K, V>	Add maps together
Map<K, V>	search()	Iterable<MapEntry<K, T>>	Recursively search nested maps by type
Map<K, V>	where()	Map<K, V>	Filter by keys and values
Map<K, V>	whereKey()	Map<K, V>	Filter by keys only
Map<K, V>	whereValue()	Map<K, V>	Filter by values only
Map<String, dynamic>	mergeNested()	Map<String, dynamic>	Deeply merge nested maps
Map<String, dynamic>	mergeNestedWithAdditions()	Map<String, dynamic>	Merge with numerical additions

Misc

Extension on	Method/Property	Returns	Description
BuildContext	appBarTheme	AppBarThemeData	Get AppBar theme data
BuildContext	backgroundColor	Color	Get background color
BuildContext	bottomAppBarTheme	BottomAppBarThemeData	Get bottom app bar theme
BuildContext	bottomSheetTheme	BottomSheetThemeData	Get bottom sheet theme
BuildContext	canPop()	bool	Check if can pop route
BuildContext	colorScheme	ColorScheme	Get color scheme
BuildContext	dividerColor	Color	Get divider color
BuildContext	focusColor	Color	Get focus color
BuildContext	hoverColor	Color	Get hover color
BuildContext	maybePop()	Future<bool>	Try to pop route
BuildContext	navigator	NavigatorState	Get NavigatorState
BuildContext	pop()	void	Pop current route
BuildContext	popUntil()	void	Pop until route name
BuildContext	primaryColor	Color	Get primary color
BuildContext	primaryColorDark	Color	Get dark primary color
BuildContext	primaryColorLight	Color	Get light primary color
BuildContext	primaryTextTheme	TextTheme	Get primary text theme
BuildContext	push()	Future<T?>	Push new route
BuildContext	pushAndRemoveUntil()	Future<T?>	Push and remove until predicate
BuildContext	pushNamed()	Future<T?>	Push named route
BuildContext	pushReplacement()	Future<T?>	Push replacement route
BuildContext	pushReplacementNamed()	Future<T?>	Push named replacement route
BuildContext	scaffoldBackgroundColor	Color	Get scaffold background color
BuildContext	textTheme	TextTheme	Get text theme
BuildContext	theme	ThemeData	Get theme data

Object

Extension on	Method/Property	Returns	Description
T	toFuture()	Future<T>	Convert any value to Future with delay
T?	flatMap()	E?	Transform nullable objects safely
T?	mapIfOfType()	R?	Apply function if object is specific type
T?	orDefault	T	Get default value for null objects

Widget

Extension on	Method/Property	Returns	Description
Widget	asToast()	void	Display widget as temporary toast dialog

Note

PRs are welcome in case you wish to broaden the list of extensions, but it must include proper documentation and tests.

License

Copyright 2025 Norbert Csörgő

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.