Storage class - dart:html library (original) (raw)

The type used by theWindow.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);

Mixed-in types

• MapMixin<String, String>

Annotations

• @Unstable()
• @Native("Storage")

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 other to this map.

override

addEntries(Iterable<MapEntry<String, String>> newEntries)→ void

Adds all key/value pairs of newEntries to this map.

inherited

cast<RK, RV>()→ Map<RK, RV>

Provides a view of this map as having RK keys and RV instances, 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 action to 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 convert function.

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 key and 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, or null if key is not in the map.

override

operator []=(String key, String value)→ void

Associates the key with the given value.

override