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    Event system

    event class

    google.maps . event class

    Namespace for all public event functions

    Access by calling const {event} = await google.maps.importLibrary("core") .See Libraries in the Maps JavaScript API .

    addListener
    addListener(instance, eventName, handler)
    Parameters:
    Return Value: MapsEventListener
    Adds the given listener function to the given event name for the given object instance. Returns an identifier for this listener that can be used with removeListener().
    addListenerOnce
    addListenerOnce(instance, eventName, handler)
    Parameters:
    Return Value: MapsEventListener
    Like addListener, but the handler removes itself after handling the first event.
    clearInstanceListeners
    clearInstanceListeners(instance)
    Parameters:
    Return Value: void
    Removes all listeners for all events for the given instance.
    clearListeners
    clearListeners(instance, eventName)
    Parameters:
    • instance :  Object
    • eventName :  string
    Return Value: void
    Removes all listeners for the given event for the given instance.
    hasListeners
    hasListeners(instance, eventName)
    Parameters:
    • instance :  Object
    • eventName :  string
    Return Value: boolean
    Returns if there are listeners for the given event on the given instance. Can be used to save the computation of expensive event details.
    removeListener
    removeListener(listener)
    Parameters:
    Return Value: void
    Removes the given listener, which should have been returned by addListener above. Equivalent to calling listener.remove() .
    trigger
    trigger(instance, eventName, eventArgs)
    Parameters:
    • instance :  Object
    • eventName :  string
    • eventArgs :  ...?
    Return Value: void
    Triggers the given event. All arguments after eventName are passed as arguments to the listeners.
    addDomListener
    addDomListener(instance, eventName, handler[, capture])
    Parameters:
    • instance :  Object
    • eventName :  string
    • handler :  Function
    • capture :  boolean optional
    Return Value: MapsEventListener
    Cross browser event handler registration. This listener is removed by calling removeListener(handle) for the handle that is returned by this function.
    addDomListenerOnce
    addDomListenerOnce(instance, eventName, handler[, capture])
    Parameters:
    • instance :  Object
    • eventName :  string
    • handler :  Function
    • capture :  boolean optional
    Return Value: MapsEventListener
    Wrapper around addDomListener that removes the listener after the first event.

    MapsEventListener interface

    google.maps . MapsEventListener interface

    An event listener, created by google.maps.event.addListener () and friends.
    remove
    remove()
    Parameters:  None
    Return Value: void
    Removes the listener.

    Calling listener.remove() is equivalent to google.maps.event.removeListener(listener) .

    MVCObject class

    google.maps . MVCObject class

    Base class implementing KVO.

    The MVCObject constructor is guaranteed to be an empty function, and so you may inherit from MVCObject by writing MySubclass.prototype = new google.maps.MVCObject(); . Unless otherwise noted, this is not true of other classes in the API, and inheriting from other classes in the API is not supported.

    Access by calling const {MVCObject} = await google.maps.importLibrary("core") .See Libraries in the Maps JavaScript API .
    MVCObject
    MVCObject()
    Parameters:  None
    Creates an MVCObject .
    addListener
    addListener(eventName, handler)
    Parameters:
    • eventName :  string
    • handler :  Function
    Return Value: MapsEventListener
    Adds the given listener function to the given event name. Returns an identifier for this listener that can be used with google.maps.event.removeListener .
    bindTo
    bindTo(key, target[, targetKey, noNotify])
    Parameters:
    • key :  string
    • target :  MVCObject
    • targetKey :  string optional
    • noNotify :  boolean optional
    Return Value:  None
    Binds a View to a Model.
    get
    get(key)
    Parameters:
    • key :  string
    Return Value: ?
    Gets a value.
    notify
    notify(key)
    Parameters:
    • key :  string
    Return Value:  None
    Notify all observers of a change on this property. This notifies both objects that are bound to the object's property as well as the object that it is bound to.
    set
    set(key, value)
    Parameters:
    • key :  string
    • value :  *
    Return Value:  None
    Sets a value.
    setValues
    setValues([values])
    Parameters:
    Return Value:  None
    Sets a collection of key-value pairs.
    unbind
    unbind(key)
    Parameters:
    • key :  string
    Return Value:  None
    Removes a binding. Unbinding will set the unbound property to the current value. The object will not be notified, as the value has not changed.
    unbindAll
    unbindAll()
    Parameters:  None
    Return Value:  None
    Removes all bindings.

    MVCArray class

    google.maps . MVCArray<T> class

    This class extends MVCObject .

    Access by calling const {MVCArray} = await google.maps.importLibrary("core") .See Libraries in the Maps JavaScript API .

    MVCArray
    MVCArray([array])
    Parameters:
    • array :  Array <T> optional
    A mutable MVC Array.
    clear
    clear()
    Parameters:  None
    Return Value:  None
    Removes all elements from the array.
    forEach
    forEach(callback)
    Parameters:
    • callback :  function(T, number): void
    Return Value:  None
    Iterate over each element, calling the provided callback. The callback is called for each element like: callback(element, index).
    getArray
    getArray()
    Parameters:  None
    Return Value: Array <T>
    Returns a reference to the underlying Array. Warning: if the Array is mutated, no events will be fired by this object.
    getAt
    getAt(i)
    Parameters:
    • i :  number
    Return Value: T
    Returns the element at the specified index.
    getLength
    getLength()
    Parameters:  None
    Return Value: number
    Returns the number of elements in this array.
    insertAt
    insertAt(i, elem)
    Parameters:
    • i :  number
    • elem :  T
    Return Value:  None
    Inserts an element at the specified index.
    pop
    pop()
    Parameters:  None
    Return Value: T
    Removes the last element of the array and returns that element.
    push
    push(elem)
    Parameters:
    • elem :  T
    Return Value: number
    Adds one element to the end of the array and returns the new length of the array.
    removeAt
    removeAt(i)
    Parameters:
    • i :  number
    Return Value: T
    Removes an element from the specified index.
    setAt
    setAt(i, elem)
    Parameters:
    • i :  number
    • elem :  T
    Return Value:  None
    Sets an element at the specified index.
    Inherited: addListener , bindTo , get , notify , set , setValues , unbind , unbindAll
    insert_at
    function(index)
    Arguments:
    • index :  number
    This event is fired when insertAt() is called. The event passes the index that was passed to insertAt() .
    remove_at
    function(index, removed)
    Arguments:
    • index :  number
    • removed :  T The element removed from the array at index .
    This event is fired when removeAt() is called. The event passes the index that was passed to removeAt() and the element that was removed from the array.
    set_at
    function(index, previous)
    Arguments:
    • index :  number
    • previous :  T The element that was previously in the array at index .
    This event is fired when setAt() is called. The event passes the index that was passed to setAt() and the element that was previously in the array at that index.

    ErrorEvent interface

    google.maps . ErrorEvent interface

    An event with an associated Error.
    error
    Type: Error
    The Error related to the event.
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