comment element | comment object

Indicates a comment that is not displayed.

Members

The comment object has these types of members:

Events

The comment object has these events.

EventDescription
abort

Fires when the user aborts the download.

afterupdate

Fires on a databound object after successfully updating the associated data in the data source object.

beforecopy

Fires on the source object before the selection is copied to the system clipboard.

beforeupdate

Fires on a databound object before updating the associated data in the data source object.

cellchange

Fires when data changes in the data provider.

change

Fires when the contents of the object or selection have changed.

dataavailable

Fires periodically as data arrives from data source objects that asynchronously transmit their data.

datasetchanged

Fires when the data set exposed by a data source object changes.

error

Fires when an error occurs during object loading.

errorupdate

Fires on a databound object when an error occurs while updating the associated data in the data source object.

filterchange

Fires when a visual filter changes state or completes a transition.

input

Occurs when the text content of an element is changed through the user interface.

layoutcomplete

Fires when the print or print preview layout process finishes filling the current LayoutRect object with content from the source document.

load

Fires immediately after the client loads the object.

ondatasetcomplete

Fires to indicate that all data is available from the data source object.

onselect

Fires when the current selection changes.

propertychange

Fires when a property changes on the object.

Note  The onpropertychange event is only supported in conjunction with the legacy attachEvent IE-only event registration model, which has deprecated since Internet Explorer 9 in favor of the W3C standard "addEventListener" event model.

readystatechange

Fires when the state of the object has changed.

reset

Fires when the user resets a form.

resize

Fires when the size of the object is about to change.

rowenter

Fires to indicate that the current row has changed in the data source and new data values are available on the object.

rowexit

Fires just before the data source control changes the current row in the object.

rowsdelete

Fires when rows are about to be deleted from the recordset.

rowsinserted

Fires just after new rows are inserted in the current recordset.

 

Methods

The comment object has these methods.

MethodDescription
addBehavior

Attaches a behavior to the element.

appendChild

Appends an element as a child to the object.

appendData

Adds a new character string to the end of the object.

applyElement

Makes the element either a child or parent of another element.

attachEvent

Note   attachEvent is no longer supported. Starting with IE11, use addEventListener. For info, see Compatibility changes.

Binds the specified function to an event, so that the function gets called whenever the event fires on the object.

clearAttributes

Removes all attributes and values from the object.

cloneNode

Copies a reference to the object from the document hierarchy.

componentFromPoint

Returns the component located at the specified coordinates via certain events.

deleteData

Removes a specified range of characters from the object.

detachEvent

Unbinds the specified function from the event, so that the function stops receiving notifications when the event fires.

doScroll

Note   doScroll is no longer supported. Starting with IE11, use scrollLeft or scrollTop. For info, see Compatibility changes.

Simulates a click on a scroll bar component.

dragDrop

Initiates a drag event.

fireEvent

Fires a specified event on the object.

getAdjacentText

Returns the adjacent text string.

getAttribute

Retrieves the value of the specified attribute.

getAttributeNode

Retrieves an attribute object referenced by the attribute.name property.

getAttributeNodeNS

Gets an attribute object that matches the specified namespace and name.

getAttributeNS

Gets the value of the specified attribute within the specified namespace.

getBoundingClientRect

Retrieves an object that specifies the bounds of a collection of TextRectangle objects.

getClientRects

Retrieves a collection of rectangles that describes the layout of the contents of an object or range within the client. Each rectangle describes a single line.

getElementsByClassName

Gets a collection of objects that are based on the value of the class attribute.

getElementsByTagNameNS

Gets a collection of objects that are based on the specified element names within a specified namespace.

hasAttribute

Determines whether an attribute with the specified name exists.

hasAttributeNS

Determines whether an attribute that has the specified namespace and name exists.

hasAttributes

Determines whether one or more attributes exist for the object.

hasChildNodes

Returns a value that indicates whether the object has children.

insertAdjacentElement

Inserts an element at the specified location.

insertBefore

Inserts an element into the document hierarchy as a child node of a parent object.

insertData

Inserts a new character string in the object at a specified offset.

mergeAttributes

Copies all read/write attributes to the specified element.

msMatchesSelector

Determines whether an object matches the specified selector.

normalize

Merges adjacent DOM objects to produce a normalized document object model.

removeAttribute

Removes an attribute from an object.

removeAttributeNode

Removes an attribute object from the object.

removeAttributeNS

Removes the specified attribute from the object.

removeBehavior

Detaches a behavior from the element.

removeChild

Removes a child node from the object.

removeNode

Removes the object from the document hierarchy.

replaceAdjacentText

Replaces the text adjacent to the element.

replaceChild

Replaces an existing child element with a new child element.

replaceData

Replaces a specified range of characters in the object with a new character string.

replaceNode

Replaces the object with another element.

scrollIntoView

Causes the object to scroll into view, aligning it either at the top or bottom of the window.

setActive

Sets the object as active without setting focus to the object.

setAttribute

Sets the value of the specified attribute.

setAttributeNode

Sets an attribute object node as part of the object.

setAttributeNodeNS

Sets an attribute object as part of the object.

setAttributeNS

Sets the value of the specified attribute within the specified namespace.

setCapture

Sets the mouse capture to the object that belongs to the current document.

substringData

Extracts a range of characters from the object.

swapNode

Exchanges the location of two objects in the document hierarchy.

 

Properties

The comment object has these properties.

PropertyDescription

attributes

Retrieves a collection of attributes of the object.

canHaveChildren

Gets a value indicating whether the object can contain child objects.

canHaveHTML

Retrieves the value indicating whether the object can contain rich HTML markup.

childElementCount

Retrieves the number of immediate child nodes of the current element or a zero if the element does not contain any child nodes. childElementCount does not return all child nodes, only child nodes that are nodeType =1, or element nodes.

constructor

Returns a reference to the constructor of an object.

data

Sets or retrieves the URL that references the data of the object.

firstChild

Gets a reference to the first child in the childNodes collection of the object.

firstElementChild

Retrieves a reference to the first child element, or null if there are no child elements.

id

Sets or retrieves the string identifying the object.

isContentEditable

Gets the value that indicates whether the user can edit the contents of the object.

isDisabled

Gets the value that indicates whether the user can interact with the object.

isMultiLine

Retrieves the value indicating whether the content of the object contains one or more lines.

lastChild

Gets a reference to the last child in the childNodes collection of an object.

lastElementChild

Retrieves a reference to the last child element or null if there are no child elements.

length

Sets or retrieves the number of objects in a collection.

nextElementSibling

Retrieves a reference to the sibling element that immediately follows or null if the element does not have any sibling elements that follow it.

nextSibling

Retrieves a reference to the next child of the parent for the object.

nodeName

Gets the name of a particular type of node.

nodeType

Retrieves the type of the requested node.

nodeValue

Gets or sets the value of a node.

ownerDocument

Retrieves the document object associated with the node.

parentNode

Retrieves the parent object in the document hierarchy.

previousElementSibling

Retrieves a reference to the immediately preceding sibling element or null if the element does not have any preceding siblings.

previousSibling

Gets a reference to the previous child of the parent for the object.

readyState

Retrieves the current state of the object.

role

Sets or retrieves the role for this element.

scopeName

Gets the namespace defined for the element.

This property is not supported for Windows Store apps using JavaScript.

tagUrn

Sets or gets the URN specified in the namespace declaration.

This property is not supported for Windows Store apps using JavaScript.

text

Retrieves or sets the text of the object as a string.

uniqueID

Retrieves an autogenerated, unique identifier for the object.

 

Standards information

There are no standards that apply here.

Remarks

The COMMENT element is treated as a no-scope element and does not expose any children.

The comment.length property, available as of Microsoft Internet Explorer 6, returns the number of characters in the object.

See also

HTML Comment Element

 

 

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