Storage class
The type used by the Window.localStorage and Window.sessionStorage properties. Storage is implemented as a Map<String, String>.
To store and get values, use Dart's built-in map syntax:
window.localStorage['key1'] = 'val1';
window.localStorage['key2'] = 'val2';
window.localStorage['key3'] = 'val3';
assert(window.localStorage['key3'] == 'val3');
You can use Map APIs such as containsValue(), clear(), and length:
assert(window.localStorage.containsValue('does not exist') == false);
window.localStorage.clear();
assert(window.localStorage.length == 0);
Properties
- entries → Iterable<
MapEntry< String, String> > - The map entries of this Map.no setterinherited
- hashCode → int
- The hash code for this object.no setterinherited
- isEmpty → bool
- Whether there is no key/value pair in the map.no setteroverride
- isNotEmpty → bool
- Whether there is at least one key/value pair in the map.no setteroverride
- keys → Iterable<
String> - The keys of this Map.no setteroverride
- length → int
- The number of key/value pairs in the map.no setteroverride
- runtimeType → Type
- A representation of the runtime type of the object.no setterinherited
- values → Iterable<
String> - The values of this Map.no setteroverride
Methods
- addAll(
Map< String, String> other) → void - Adds all key/value pairs of
otherto this map.override - addEntries(
Iterable< MapEntry< newEntries) → voidString, String> > - Adds all key/value pairs of
newEntriesto this map.inherited - cast<
RK, RV> () → Map< RK, RV> - Provides a view of this map as having
RKkeys andRVinstances, if necessary.inherited - clear(
) → void - Removes all entries from the map.override
- containsKey(
Object? key) → bool - Whether this map contains the given
key.override - containsValue(
Object? value) → bool - Whether this map contains the given
value.override - forEach(
void f(String key, String value)) → void - Applies
actionto each key/value pair of the map.override - map<
K2, V2> (MapEntry< K2, V2> transform(String key, String value)) → Map<K2, V2> - Returns a new map where all entries of this map are transformed by the given
convertfunction.inherited - noSuchMethod(
Invocation invocation) → dynamic - Invoked when a nonexistent method or property is accessed.inherited
- putIfAbsent(
String key, String ifAbsent()) → String - Look up the value of
key, or add a new entry if it isn't there.override - remove(
Object? key) → String? - Removes
keyand its associated value, if present, from the map.override - removeWhere(
bool test(String key, String value)) → void - Removes all entries of this map that satisfy the given
test.inherited - toString(
) → String - A string representation of this object.inherited
- update(
String key, String update(String value), {String ifAbsent()?}) → String - Updates the value for the provided
key.inherited - updateAll(
String update(String key, String value)) → void - Updates all values.inherited
Operators
- operator ==(
Object other) → bool - The equality operator.inherited
- operator [](
Object? key) → String? - The value for the given
key, ornullifkeyis not in the map.override - operator []=(
String key, String value) → void - Associates the
keywith the givenvalue.override