Interface AsyncStorage

interface AsyncStorage {
    length: Promise<number>;
    clear(): Promise<void>;
    getItem(key): Promise<null | string>;
    key(index): Promise<null | string>;
    removeItem(key): Promise<void>;
    setItem(key, value): Promise<void>;
}

Properties

length

Methods

clear getItem key removeItem setItem

Properties

Readonly length

length: Promise<number>

Returns the number of key/value pairs.

Methods

clear

  • clear(): Promise<void>

  • Removes all key/value pairs, if there are any.

    Dispatches a storage event on Window objects holding an equivalent Storage object.

    Returns Promise<void>

getItem

  • getItem(key): Promise<null | string>

  • Returns the current value associated with the given key, or null if the given key does not exist.

    Parameters

    • key: string

    Returns Promise<null | string>

key

  • key(index): Promise<null | string>

  • Returns the name of the nth key, or null if n is greater than or equal to the number of key/value pairs.

    Parameters

    • index: number

    Returns Promise<null | string>

removeItem

  • removeItem(key): Promise<void>

  • Removes the key/value pair with the given key, if a key/value pair with the given key exists.

    Dispatches a storage event on Window objects holding an equivalent Storage object.

    Parameters

    • key: string

    Returns Promise<void>

setItem

  • setItem(key, value): Promise<void>

  • Sets the value of the pair identified by key to value, creating a new key/value pair if none existed for key previously.

    Throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

    Dispatches a storage event on Window objects holding an equivalent Storage object.

    Parameters

    • key: string
    • value: string

    Returns Promise<void>

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