API Docs for: 3.18.1

Plugin.ScrollInfo Class

Extends Plugin.Base
Defined in: node-scroll-info/js/node-scroll-info.js:11
Module: node-scroll-info

Available since 3.7.0

Provides convenient events and methods related to scrolling. This could be used, for example, to implement infinite scrolling, or to lazy-load content based on the current scroll position.

Example

var body = Y.one('body');

body.plug(Y.Plugin.ScrollInfo);

body.scrollInfo.on('scrollToBottom', function (e) {
    // Load more content when the user scrolls to the bottom of the page.
});

Methods

addAttr

(
  • name
  • config
  • lazy
)
Object chainable

Inherited from AttributeCore: attribute/js/AttributeCore.js:157

Adds an attribute with the provided configuration to the host object.

The config argument object supports the following properties:

value <Any>
The initial value to set on the attribute
valueFn <Function | String>

A function, which will return the initial value to set on the attribute. This is useful for cases where the attribute configuration is defined statically, but needs to reference the host instance ("this") to obtain an initial value. If both the value and valueFn properties are defined, the value returned by the valueFn has precedence over the value property, unless it returns undefined, in which case the value property is used.

valueFn can also be set to a string, representing the name of the instance method to be used to retrieve the value.

readOnly <boolean>
Whether or not the attribute is read only. Attributes having readOnly set to true cannot be modified by invoking the set method.
writeOnce <boolean> or <string>
Whether or not the attribute is "write once". Attributes having writeOnce set to true, can only have their values set once, be it through the default configuration, constructor configuration arguments, or by invoking set.

The writeOnce attribute can also be set to the string "initOnly", in which case the attribute can only be set during initialization (when used with Base, this means it can only be set during construction)

setter <Function | String>

The setter function used to massage or normalize the value passed to the set method for the attribute. The value returned by the setter will be the final stored value. Returning Attribute.INVALID_VALUE, from the setter will prevent the value from being stored.

setter can also be set to a string, representing the name of the instance method to be used as the setter function.

getter <Function | String>

The getter function used to massage or normalize the value returned by the get method for the attribute. The value returned by the getter function is the value which will be returned to the user when they invoke get.

getter can also be set to a string, representing the name of the instance method to be used as the getter function.

validator <Function | String>

The validator function invoked prior to setting the stored value. Returning false from the validator function will prevent the value from being stored.

validator can also be set to a string, representing the name of the instance method to be used as the validator function.

lazyAdd <boolean>
Whether or not to delay initialization of the attribute until the first call to get/set it. This flag can be used to over-ride lazy initialization on a per attribute basis, when adding multiple attributes through the addAttrs method.

The setter, getter and validator are invoked with the value and name passed in as the first and second arguments, and with the context ("this") set to the host object.

Configuration properties outside of the list mentioned above are considered private properties used internally by attribute, and are not intended for public use.

Parameters:

  • name String

    The name of the attribute.

  • config Object

    An object with attribute configuration property/value pairs, specifying the configuration for the attribute.

    NOTE: The configuration object is modified when adding an attribute, so if you need to protect the original values, you will need to merge the object.

  • lazy Boolean

    (optional) Whether or not to add this attribute lazily (on the first call to get/set).

Returns:

Object:

A reference to the host object.

addAttrs

(
  • cfgs
  • values
  • lazy
)
Object chainable

Inherited from AttributeCore: attribute/js/AttributeCore.js:823

Configures a group of attributes, and sets initial values.

NOTE: This method does not isolate the configuration object by merging/cloning. The caller is responsible for merging/cloning the configuration object if required.

Parameters:

  • cfgs Object

    An object with attribute name/configuration pairs.

  • values Object

    An object with attribute name/value pairs, defining the initial values to apply. Values defined in the cfgs argument will be over-written by values in this argument unless defined as read only.

  • lazy Boolean

    Whether or not to delay the intialization of these attributes until the first call to get/set. Individual attributes can over-ride this behavior by defining a lazyAdd configuration property in their configuration. See addAttr.

Returns:

Object:

A reference to the host object.

addTarget

(
  • o
)
chainable

Inherited from EventTarget: event-custom/js/event-facade.js:496

Registers another EventTarget as a bubble target. Bubble order is determined by the order registered. Multiple targets can be specified.

Events can only bubble if emitFacade is true.

Included in the event-custom-complex submodule.

Parameters:

after

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:812

Subscribe to a custom event hosted by this object. The supplied callback will execute after any listeners add via the subscribe method, and after the default function, if configured for the event, has executed.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching the subscription

afterHostEvent

(
  • type
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:186

Listens for the "after" moment of events fired by the host object.

Listeners attached through this method will be detached when the plugin is unplugged.

Parameters:

  • type String | Object

    The event type.

  • fn Function

    The listener.

  • context Object

    The execution context. Defaults to the plugin instance.

Returns:

EventHandle:

handle The detach handle for the listener.

afterHostMethod

(
  • method
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:238

Injects a function to be executed after a given method on host object.

The function will be detached when the plugin is unplugged.

Parameters:

  • method String

    The name of the method to inject the function after.

  • fn Function

    The function to inject.

  • context Object

    The execution context. Defaults to the plugin instance.

Returns:

EventHandle:

handle The detach handle for the injected function.

attrAdded

(
  • name
)
Boolean

Inherited from AttributeCore: attribute/js/AttributeCore.js:319

Checks if the given attribute has been added to the host

Parameters:

  • name String

    The name of the attribute to check.

Returns:

Boolean:

true if an attribute with the given name has been added, false if it hasn't. This method will return true for lazily added attributes.

before

()

Inherited from EventTarget: event-custom/js/event-target.js:849

Executes the callback before a DOM event, custom event or method. If the first argument is a function, it is assumed the target is a method. For DOM and custom events, this is an alias for Y.on.

For DOM and custom events: type, callback, context, 0-n arguments

For methods: callback, object (method host), methodName, context, 0-n arguments

Returns:

detach handle

beforeHostMethod

(
  • method
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:221

Injects a function to be executed before a given method on host object.

The function will be detached when the plugin is unplugged.

Parameters:

  • method String

    The name of the method to inject the function before.

  • fn Function

    The function to inject.

  • context Object

    The execution context. Defaults to the plugin instance.

Returns:

EventHandle:

handle The detach handle for the injected function.

bubble

(
  • evt
)
Boolean

Inherited from EventTarget: event-custom/js/event-facade.js:554

Propagate an event. Requires the event-custom-complex module.

Parameters:

Returns:

Boolean:

the aggregated return value from Event.Custom.fire

destroy

() BaseCore chainable

Inherited from BaseObservable but overwritten in base/js/BaseCore.js:352

Destroy lifecycle method. Invokes destructors for the class hierarchy.

Returns:

BaseCore:

A reference to this object

destructor

()

Inherited from Plugin.Base: plugin/js/plugin.js:89

Destructor lifecycle implementation.

Removes any event listeners or injected methods applied by the Plugin

detach

(
  • type
  • fn
  • context
)
EventTarget

Inherited from EventTarget: event-custom/js/event-target.js:356

Detach one or more listeners the from the specified event

Parameters:

  • type String | Object

    Either the handle to the subscriber or the type of event. If the type is not specified, it will attempt to remove the listener from all hosted events.

  • fn Function

    The subscribed function to unsubscribe, if not supplied, all subscribers will be removed.

  • context Object

    The custom object passed to subscribe. This is optional, but if supplied will be used to disambiguate multiple listeners that are the same (e.g., you subscribe many object using a function that lives on the prototype)

Returns:

EventTarget:

the host

detachAll

(
  • type
)

Inherited from EventTarget: event-custom/js/event-target.js:479

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String

    The type, or name of the event

doAfter

(
  • strMethod
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:128

Listens for the "after" moment of events fired by the host, or injects code "after" a given method on the host.

Parameters:

  • strMethod String

    The event to listen for, or method to inject logic after.

  • fn Function

    The handler function. For events, the "after" moment listener. For methods, the function to execute after the given method is executed.

  • context Object

    An optional context to call the handler with. The default context is the plugin instance.

Returns:

EventHandle:

handle The detach handle for the listener.

doBefore

(
  • strMethod
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:105

Listens for the "on" moment of events fired by the host, or injects code "before" a given method on the host.

Parameters:

  • strMethod String

    The event to listen for, or method to inject logic before.

  • fn Function

    The handler function. For events, the "on" moment listener. For methods, the function to execute before the given method is executed.

  • context Object

    An optional context to call the handler with. The default context is the plugin instance.

Returns:

EventHandle:

handle The detach handle for the handler.

fire

(
  • type
  • arguments
)
Boolean

Inherited from EventTarget: event-custom/js/event-target.js:673

Fire a custom event by name. The callback functions will be executed from the context specified when the event was created, and with the following parameters.

The first argument is the event type, and any additional arguments are passed to the listeners as parameters. If the first of these is an object literal, and the event is configured to emit an event facade, that object is mixed into the event facade and the facade is provided in place of the original object.

If the custom event object hasn't been created, then the event hasn't been published and it has no subscribers. For performance sake, we immediate exit in this case. This means the event won't bubble, so if the intention is that a bubble target be notified, the event must be published on this object first.

Parameters:

  • type String | Object

    The type of the event, or an object that contains a 'type' property.

  • arguments Object*

    an arbitrary set of parameters to pass to the handler. If the first of these is an object literal and the event is configured to emit an event facade, the event facade will replace that parameter after the properties the object literal contains are copied to the event facade.

Returns:

Boolean:

True if the whole lifecycle of the event went through, false if at any point the event propagation was halted.

get

(
  • name
)
Any

Inherited from AttributeCore: attribute/js/AttributeCore.js:331

Returns the current value of the attribute. If the attribute has been configured with a 'getter' function, this method will delegate to the 'getter' to obtain the value of the attribute.

Parameters:

  • name String

    The name of the attribute. If the value of the attribute is an Object, dot notation can be used to obtain the value of a property of the object (e.g. get("x.y.z"))

Returns:

Any:

The value of the attribute

getAttrs

(
  • attrs
)
Object

Inherited from AttributeCore: attribute/js/AttributeCore.js:780

Gets multiple attribute values.

Parameters:

  • attrs String[] | Boolean

    Optional. An array of attribute names. If omitted, all attribute values are returned. If set to true, all attributes modified from their initial values are returned.

Returns:

Object:

An object with attribute name/value pairs.

getEvent

(
  • type
  • prefixed
)
CustomEvent

Inherited from EventTarget: event-custom/js/event-target.js:793

Returns the custom event of the provided type has been created, a falsy value otherwise

Parameters:

  • type String

    the type, or name of the event

  • prefixed String

    if true, the type is prefixed already

Returns:

CustomEvent:

the custom event or null

getOffscreenNodes

(
  • [selector]
  • [margin]
)
NodeList

Defined in node-scroll-info/js/node-scroll-info.js:229

Returns a NodeList containing all offscreen nodes inside the host node that match the given CSS selector. An offscreen node is any node that is entirely outside the visible (onscreen) region of the host node based on the current scroll location.

Parameters:

  • [selector] String optional

    CSS selector. If omitted, all offscreen nodes will be returned.

  • [margin] Number optional

    Additional margin in pixels beyond the actual onscreen region that should be considered "onscreen" for the purposes of this query. Defaults to the value of the scrollMargin attribute.

Returns:

NodeList:

Offscreen nodes matching selector.

getOnscreenNodes

(
  • [selector]
  • [margin]
)
NodeList

Defined in node-scroll-info/js/node-scroll-info.js:256

Returns a NodeList containing all onscreen nodes inside the host node that match the given CSS selector. An onscreen node is any node that is fully or partially within the visible (onscreen) region of the host node based on the current scroll location.

Parameters:

  • [selector] String optional

    CSS selector. If omitted, all onscreen nodes will be returned.

  • [margin] Number optional

    Additional margin in pixels beyond the actual onscreen region that should be considered "onscreen" for the purposes of this query. Defaults to the value of the scrollMargin attribute.

Returns:

NodeList:

Onscreen nodes matching selector.

getScrollInfo

() Object

Defined in node-scroll-info/js/node-scroll-info.js:283

Returns an object hash containing information about the current scroll position of the host node. This is the same information that's mixed into the event facade of the scroll event and other scroll-related events.

Returns:

Object:

Object hash containing information about the current scroll position. See the scroll event for details on what properties this object contains.

getTargets

()

Inherited from EventTarget: event-custom/js/event-facade.js:523

Returns an array of bubble targets for this object.

Returns:

EventTarget[]

init

(
  • cfg
)
BaseCore chainable

Inherited from BaseObservable but overwritten in base/js/BaseCore.js:319

Init lifecycle method, invoked during construction. Sets up attributes and invokes initializers for the class hierarchy.

Parameters:

  • cfg Object

    Object with configuration property name/value pairs

Returns:

BaseCore:

A reference to this object

initializer

(
  • config
)

Inherited from Plugin.Base: plugin/js/plugin.js:77

Initializer lifecycle implementation.

Parameters:

  • config Object

    Configuration object with property name/value pairs.

isNodeOnscreen

(
  • node
  • [margin]
)
Boolean

Defined in node-scroll-info/js/node-scroll-info.js:327

Available since 3.11.0

Returns true if node is at least partially onscreen within the host node, false otherwise.

Parameters:

  • node HTMLElement | Node | String

    Node or selector to check.

  • [margin] Number optional

    Additional margin in pixels beyond the actual onscreen region that should be considered "onscreen" for the purposes of this query. Defaults to the value of the scrollMargin attribute.

Returns:

Boolean:

true if node is at least partially onscreen within the host node, false otherwise.

modifyAttr

(
  • name
  • config
)

Inherited from AttributeExtras: attribute/js/AttributeExtras.js:40

Updates the configuration of an attribute which has already been added.

The properties which can be modified through this interface are limited to the following subset of attributes, which can be safely modified after a value has already been set on the attribute:

readOnly;
writeOnce;
broadcast; and
getter.

Note: New attributes cannot be added using this interface. New attributes must be added using addAttr, or an appropriate manner for a class which utilises Attributes (e.g. the ATTRS property in Base).

Parameters:

  • name String

    The name of the attribute whose configuration is to be updated.

  • config Object

    An object with configuration property/value pairs, specifying the configuration properties to modify.

on

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:188

Subscribe a callback function to a custom event fired by this object or from an object that bubbles its events to this object.

 this.on("change", this._onChange, this);

Callback functions for events published with emitFacade = true will receive an EventFacade as the first argument (typically named "e"). These callbacks can then call e.preventDefault() to disable the behavior published to that event's defaultFn. See the EventFacade API for all available properties and methods. Subscribers to non-emitFacade events will receive the arguments passed to fire() after the event name.

To subscribe to multiple events at once, pass an object as the first argument, where the key:value pairs correspond to the eventName:callback.

 this.on({
     "attrChange" : this._onAttrChange,
     "change"     : this._onChange
 });

You can also pass an array of event names as the first argument to subscribe to all listed events with the same callback.

 this.on([ "change", "attrChange" ], this._onChange);

Returning false from a callback is supported as an alternative to calling e.preventDefault(); e.stopPropagation();. However, it is recommended to use the event methods whenever possible.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching that subscription

once

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:124

Listen to a custom event hosted by this object one time. This is the equivalent to on except the listener is immediatelly detached when it is executed.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching the subscription

onceAfter

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:146

Listen to a custom event hosted by this object one time. This is the equivalent to after except the listener is immediatelly detached when it is executed.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching that subscription

onceAfterHostEvent

(
  • type
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:203

Listens for the "after" moment of events fired by the host object one time only. The listener is immediately detached when it is executed.

Listeners attached through this method will be detached when the plugin is unplugged.

Parameters:

  • type String | Object

    The event type.

  • fn Function

    The listener.

  • context Object

    The execution context. Defaults to the plugin instance.

Returns:

EventHandle:

handle The detach handle for the listener.

onceHostEvent

(
  • type
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:168

Listens for the "on" moment of events fired by the host object one time only. The listener is immediately detached when it is executed.

Listeners attached through this method will be detached when the plugin is unplugged.

Parameters:

  • type String | Object

    The event type.

  • fn Function

    The listener.

  • context Object

    The execution context. Defaults to the plugin instance.

Returns:

EventHandle:

handle The detach handle for the listener.

onHostEvent

(
  • type
  • fn
  • context
)
EventHandle

Inherited from Plugin.Base: plugin/js/plugin.js:151

Listens for the "on" moment of events fired by the host object.

Listeners attached through this method will be detached when the plugin is unplugged.

Parameters:

  • type String | Object

    The event type.

  • fn Function

    The listener.

  • context Object

    The execution context. Defaults to the plugin instance.

Returns:

EventHandle:

handle The detach handle for the listener.

parseType

(
  • type
  • [pre]
)
Array

Inherited from EventTarget: event-custom/js/event-target.js:168

Available since 3.3.0

Takes the type parameter passed to 'on' and parses out the various pieces that could be included in the type. If the event type is passed without a prefix, it will be expanded to include the prefix one is supplied or the event target is configured with a default prefix.

Parameters:

  • type String

    the type

  • [pre] String optional

    The prefix. Defaults to this._yuievt.config.prefix

Returns:

Array:

an array containing:

  • the detach category, if supplied,
  • the prefixed event type,
  • whether or not this is an after listener,
  • the supplied event type

publish

(
  • type
  • opts
)
CustomEvent

Inherited from EventTarget: event-custom/js/event-target.js:503

Creates a new custom event of the specified type. If a custom event by that name already exists, it will not be re-created. In either case the custom event is returned.

Parameters:

  • type String

    the type, or name of the event

  • opts Object

    optional config params. Valid properties are:

    • [broadcast=false] Boolean optional

      whether or not the YUI instance and YUI global are notified when the event is fired.

    • [bubbles=true] Boolean optional

      Whether or not this event bubbles. Events can only bubble if emitFacade is true.

    • [context=this] Object optional

      the default execution context for the listeners.

    • [defaultFn] Function optional

      the default function to execute when this event fires if preventDefault was not called.

    • [emitFacade=false] Boolean optional

      whether or not this event emits a facade.

    • [prefix] String optional

      the prefix for this targets events, e.g., 'menu' in 'menu:click'.

    • [fireOnce=false] Boolean optional

      if an event is configured to fire once, new subscribers after the fire will be notified immediately.

    • [async=false] Boolean optional

      fireOnce event listeners will fire synchronously if the event has already fired unless async is true.

    • [preventable=true] Boolean optional

      whether or not preventDefault() has an effect.

    • [preventedFn] Function optional

      a function that is executed when preventDefault() is called.

    • [queuable=false] Boolean optional

      whether or not this event can be queued during bubbling.

    • [silent] Boolean optional

      if silent is true, debug messages are not provided for this event.

    • [stoppedFn] Function optional

      a function that is executed when stopPropagation is called.

    • [monitored] Boolean optional

      specifies whether or not this event should send notifications about when the event has been attached, detached, or published.

    • [type] String optional

      the event type (valid option if not provided as the first parameter to publish).

Returns:

CustomEvent:

the custom event

refreshDimensions

()

Defined in node-scroll-info/js/node-scroll-info.js:345

Refreshes cached position, height, and width dimensions for the host node. If the host node is the body, then the viewport height and width will be used.

This info is cached to improve performance during scroll events, since it's expensive to touch the DOM for these values. Dimensions are automatically refreshed whenever the browser is resized, but if you change the dimensions or position of the host node in JS, you may need to call refreshDimensions() manually to cache the new dimensions.

removeAttr

(
  • name
)

Inherited from AttributeExtras: attribute/js/AttributeExtras.js:90

Removes an attribute from the host object

Parameters:

  • name String

    The name of the attribute to be removed.

removeTarget

(
  • o
)
chainable

Inherited from EventTarget: event-custom/js/event-facade.js:533

Removes a bubble target

Parameters:

reset

(
  • name
)
Object chainable

Inherited from AttributeExtras: attribute/js/AttributeExtras.js:100

Resets the attribute (or all attributes) to its initial value, as long as the attribute is not readOnly, or writeOnce.

Parameters:

  • name String

    Optional. The name of the attribute to reset. If omitted, all attributes are reset.

Returns:

Object:

A reference to the host object.

set

(
  • name
  • value
  • [opts]
)
Object chainable

Inherited from AttributeObservable but overwritten in attribute/js/AttributeCore.js:388

Sets the value of an attribute.

Parameters:

  • name String

    The name of the attribute. If the current value of the attribute is an Object, dot notation can be used to set the value of a property within the object (e.g. set("x.y.z", 5)).

  • value Any

    The value to set the attribute to.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

Returns:

Object:

A reference to the host object.

setAttrs

(
  • attrs
  • [opts]
)
Object chainable

Inherited from AttributeObservable but overwritten in attribute/js/AttributeCore.js:747

Sets multiple attribute values.

Parameters:

  • attrs Object

    An object with attributes name/value pairs.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

Returns:

Object:

A reference to the host object.

subscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:346

Deprecated: use on

subscribe to an event

toString

() String

Inherited from BaseCore: base/js/BaseCore.js:815

Default toString implementation. Provides the constructor NAME and the instance guid, if set.

Returns:

String:

String representation for this object

unsubscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:469

Deprecated: use detach

detach a listener

unsubscribeAll

(
  • type
)
deprecated

Inherited from EventTarget: event-custom/js/event-target.js:490

Deprecated: use detachAll

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String

    The type, or name of the event

Properties

name

String deprecated

Inherited from BaseCore: base/js/BaseCore.js:297

Deprecated: Use this.constructor.NAME

The string used to identify the class of this object.

Attributes

destroyed

Boolean readonly

Inherited from BaseCore: base/js/BaseCore.js:212

Flag indicating whether or not this object has been through the destroy lifecycle phase.

Default: false

Fires event destroyedChange

Fires when the value for the configuration attribute destroyed is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

host

Plugin.Host

Inherited from Plugin.Base: plugin/js/plugin.js:31

The plugin's host object.

Fires event hostChange

Fires when the value for the configuration attribute host is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

initialized

Boolean readonly

Inherited from BaseCore: base/js/BaseCore.js:198

Flag indicating whether or not this object has been through the init lifecycle phase.

Default: false

Fires event initializedChange

Fires when the value for the configuration attribute initialized is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

scrollDelay

Number

Defined in node-scroll-info/js/node-scroll-info.js:617

Number of milliseconds to wait after a native scroll event before firing local scroll events. If another native scroll event occurs during this time, previous events will be ignored. This ensures that we don't fire thousands of events when the user is scrolling quickly.

Default: 50

Fires event scrollDelayChange

Fires when the value for the configuration attribute scrollDelay is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

scrollMargin

Number

Defined in node-scroll-info/js/node-scroll-info.js:631

Additional margin in pixels beyond the onscreen region of the host node that should be considered "onscreen".

For example, if set to 50, then a scrollToBottom event would be fired when the user scrolls to within 50 pixels of the bottom of the scrollable region, even if they don't actually scroll completely to the very bottom pixel.

This margin also applies to the getOffscreenNodes() and getOnscreenNodes() methods by default.

Default: 50

Fires event scrollMarginChange

Fires when the value for the configuration attribute scrollMargin is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

Events

destroy

Inherited from BaseObservable: base/js/BaseObservable.js:163

Lifecycle event for the destroy phase, fired prior to destruction. Invoking the preventDefault method on the event object provided to subscribers will prevent destruction from proceeding.

Subscribers to the "after" moment of this event, will be notified after destruction is complete (and as a result cannot prevent destruction).

Event Payload:

init

Inherited from BaseObservable: base/js/BaseObservable.js:62

Lifecycle event for the init phase, fired prior to initialization. Invoking the preventDefault() method on the event object provided to subscribers will prevent initialization from occuring.

Subscribers to the "after" momemt of this event, will be notified after initialization of the object is complete (and therefore cannot prevent initialization).

Event Payload:

  • e EventFacade

    Event object, with a cfg property which refers to the configuration object passed to the constructor.

scroll

Defined in node-scroll-info/js/node-scroll-info.js:34

Fired when the user scrolls within the host node.

This event (like all scroll events exposed by ScrollInfo) is throttled and fired only after the number of milliseconds specified by the scrollDelay attribute have passed in order to prevent thrashing.

This event passes along the event facade for the standard DOM scroll event and mixes in the following additional properties.

Event Payload:

  • atBottom Boolean

    Whether the current scroll position is at the bottom of the scrollable region.

  • atLeft Boolean

    Whether the current scroll position is at the extreme left of the scrollable region.

  • atRight Boolean

    Whether the current scroll position is at the extreme right of the scrollable region.

  • atTop Boolean

    Whether the current scroll position is at the top of the scrollable region.

  • isScrollDown Boolean

    true if the user scrolled down.

  • isScrollLeft Boolean

    true if the user scrolled left.

  • isScrollRight Boolean

    true if the user scrolled right.

  • isScrollUp Boolean

    true if the user scrolled up.

  • scrollBottom Number

    Y value of the bottom-most onscreen pixel of the scrollable region.

  • scrollHeight Number

    Total height in pixels of the scrollable region, including offscreen pixels.

  • scrollLeft Number

    X value of the left-most onscreen pixel of the scrollable region.

  • scrollRight Number

    X value of the right-most onscreen pixel of the scrollable region.

  • scrollTop Number

    Y value of the top-most onscreen pixel of the scrollable region.

  • scrollWidth Number

    Total width in pixels of the scrollable region, including offscreen pixels.

scrollDown

Defined in node-scroll-info/js/node-scroll-info.js:74

Fired when the user scrolls down within the host node.

This event provides the same event facade as the scroll event. See that event for details.

scrollLeft

Defined in node-scroll-info/js/node-scroll-info.js:85

Fired when the user scrolls left within the host node.

This event provides the same event facade as the scroll event. See that event for details.

scrollRight

Defined in node-scroll-info/js/node-scroll-info.js:96

Fired when the user scrolls right within the host node.

This event provides the same event facade as the scroll event. See that event for details.

scrollToBottom

Defined in node-scroll-info/js/node-scroll-info.js:118

Fired when the user scrolls to the bottom of the scrollable region within the host node.

This event provides the same event facade as the scroll event. See that event for details.

scrollToLeft

Defined in node-scroll-info/js/node-scroll-info.js:130

Fired when the user scrolls to the extreme left of the scrollable region within the host node.

This event provides the same event facade as the scroll event. See that event for details.

scrollToRight

Defined in node-scroll-info/js/node-scroll-info.js:142

Fired when the user scrolls to the extreme right of the scrollable region within the host node.

This event provides the same event facade as the scroll event. See that event for details.

scrollToTop

Defined in node-scroll-info/js/node-scroll-info.js:154

Fired when the user scrolls to the top of the scrollable region within the host node.

This event provides the same event facade as the scroll event. See that event for details.

scrollUp

Defined in node-scroll-info/js/node-scroll-info.js:107

Fired when the user scrolls up within the host node.

This event provides the same event facade as the scroll event. See that event for details.