JsWeakMap (Flow Client 23.6-SNAPSHOT API)

Type Parameters:

K - the key type

V - the value type

All Known Implementing Classes:

JreJsWeakMap
```
@JsType(isNative=true)
public interface JsWeakMap<K,V>
```
Native JS WeakMap interface with an alternative implementation for JRE usage. Use JsCollections.weakMap() to create an appropriate instance.

Since:

1.0

Author:

Vaadin Ltd

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`delete(K key)`	Removes the mapping for a given key.
`V`	`get(K key)`	Gets the value mapped for the given key.
`boolean`	`has(K key)`	Checks whether this map contains a mapping for the given key.
`JsWeakMap<K,V>`	`set(K key, V value)`	Sets a value in this map, overwriting any previous mapping if present.

- Method Detail
  - set
```
JsWeakMap<K,V> set(K key,
                         V value)
```
    Sets a value in this map, overwriting any previous mapping if present.
    
    Parameters:
    
    key - the key to set
    
    value - the value to set
    
    Returns:
    
    this map, for chaining.
  - get
```
V get(K key)
```
    Gets the value mapped for the given key. Returns null if there is no mapping, if the key is explicitly mapped to null or if the key has been garbage collected.
    
    Parameters:
    
    key - the key to get a value for
    
    Returns:
    
    the value corresponding to the given key; or null there is no mapping.
  - has
```
boolean has(K key)
```
    Checks whether this map contains a mapping for the given key.
    
    Parameters:
    
    key - the key to check
    
    Returns:
    
    true if there is a mapping for the key; false if there is no mapping
  - delete
```
boolean delete(K key)
```
    Removes the mapping for a given key.
    
    Parameters:
    
    key - the key for which to remove the mapping
    
    Returns:
    
    true if the map contained a mapping for the given key prior to calling this method; false if no mapping was present