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## com.google.gwt.user.client
Class DOM

    java.lang.Object
      com.google.gwt.user.client.DOM

    public class DOM

extends java.lang.Object

This class provides a set of static methods that allow you to manipulate the browser's Document Object Model (DOM). It contains methods for manipulating both `elements` and `events`.

Constructor Summary
`DOM()`

Method Summary
`static void` | `addEventPreview(EventPreview preview)` Deprecated. replaced by `Event.addNativePreviewHandler(Event.NativePreviewHandler)`
`static void` | `appendChild(Element parent, Element child)` Appends one element to another's list of children.
`static Element` | `clone(Element elem, boolean deep)` Clones an element.
`static boolean` | `compare(Element elem1, Element elem2)` Deprecated. Use identity comparison.
`static Element` | `createAnchor()` Creates an HTML A element.
`static Element` | `createButton()` Creates an HTML BUTTON element.
`static Element` | `createCaption()` Creates an HTML CAPTION element.
`static Element` | `createCol()` Creates an HTML COL element.
`static Element` | `createColGroup()` Creates an HTML COLGROUP element.
`static Element` | `createDiv()` Creates an HTML DIV element.
`static Element` | `createElement(java.lang.String tagName)` Creates an HTML element.
`static Element` | `createFieldSet()` Creates an HTML FIELDSET element.
`static Element` | `createForm()` Creates an HTML FORM element.
`static Element` | `createIFrame()` Creates an HTML IFRAME element.
`static Element` | `createImg()` Creates an HTML IMG element.
`static Element` | `createInputCheck()` Creates an HTML INPUT type='CHECK' element.
`static Element` | `createInputPassword()` Creates an HTML INPUT type='PASSWORD' element.
`static Element` | `createInputRadio(java.lang.String name)` Creates an HTML INPUT type='RADIO' element.
`static Element` | `createInputText()` Creates an HTML INPUT type='TEXT' element.
`static Element` | `createLabel()` Creates an HTML LABEL element.
`static Element` | `createLegend()` Creates an HTML LEGEND element.
`static Element` | `createOption()` Creates an HTML OPTION element.
`static Element` | `createOptions()` Deprecated. there is no "options" element; use `createOption()` instead
`static Element` | `createSelect()` Creates a single-selection HTML SELECT element.
`static Element` | `createSelect(boolean multiple)` Creates an HTML SELECT element.
`static Element` | `createSpan()` Creates an HTML SPAN element.
`static Element` | `createTable()` Creates an HTML TABLE element.
`static Element` | `createTBody()` Creates an HTML TBODY element.
`static Element` | `createTD()` Creates an HTML TD element.
`static Element` | `createTextArea()` Creates an HTML TEXTAREA element.
`static Element` | `createTFoot()` Creates an HTML TFOOT element.
`static Element` | `createTH()` Creates an HTML TH element.
`static Element` | `createTHead()` Creates an HTML THEAD element.
`static Element` | `createTR()` Creates an HTML TR element.
`static java.lang.String` | `createUniqueId()` Generates a unique DOM id.
`static void` | `eventCancelBubble(Event evt, boolean cancel)` Cancels bubbling for the given event.
`static boolean` | `eventGetAltKey(Event evt)` Gets whether the ALT key was depressed when the given event occurred.
`static int` | `eventGetButton(Event evt)` Gets the mouse buttons that were depressed when the given event occurred.
`static int` | `eventGetClientX(Event evt)` Gets the mouse x-position within the browser window's client area.
`static int` | `eventGetClientY(Event evt)` Gets the mouse y-position within the browser window's client area.
`static boolean` | `eventGetCtrlKey(Event evt)` Gets whether the CTRL key was depressed when the given event occurred.
`static Event` | `eventGetCurrentEvent()` Gets the current event that is being fired.
`static Element` | `eventGetCurrentTarget(Event evt)` Gets the current target element of the given event.
`static Element` | `eventGetFromElement(Event evt)` Gets the element from which the mouse pointer was moved (valid for `Event.ONMOUSEOVER` and `Event.ONMOUSEOUT`).
`static int` | `eventGetKeyCode(Event evt)` Gets the key code associated with this event.
`static boolean` | `eventGetMetaKey(Event evt)` Gets whether the META key was depressed when the given event occurred.
`static int` | `eventGetMouseWheelVelocityY(Event evt)` Gets the velocity of the mouse wheel associated with the event along the Y axis.
`static boolean` | `eventGetRepeat(Event evt)` Deprecated. not supported in any browser but IE
`static int` | `eventGetScreenX(Event evt)` Gets the mouse x-position on the user's display.
`static int` | `eventGetScreenY(Event evt)` Gets the mouse y-position on the user's display.
`static boolean` | `eventGetShiftKey(Event evt)` Gets whether the shift key was depressed when the given event occurred.
`static Element` | `eventGetTarget(Event evt)` Returns the element that was the actual target of the given event.
`static Element` | `eventGetToElement(Event evt)` Gets the element to which the mouse pointer was moved (only valid for `Event.ONMOUSEOUT` and `Event.ONMOUSEOVER`).
`static int` | `eventGetType(Event evt)` Gets the enumerated type of this event (as defined in `Event`).
`static java.lang.String` | `eventGetTypeString(Event evt)` Gets the type of the given event as a string.
`static void` | `eventPreventDefault(Event evt)` Prevents the browser from taking its default action for the given event.
`static void` | `eventSetKeyCode(Event evt, char key)` Deprecated. this method only works in IE and should not have been added to the API
`static java.lang.String` | `eventToString(Event evt)` Returns a stringized version of the event.
`static int` | `getAbsoluteLeft(Element elem)` Gets an element's absolute left coordinate in the document's coordinate system.
`static int` | `getAbsoluteTop(Element elem)` Gets an element's absolute top coordinate in the document's coordinate system.
`static java.lang.String` | `getAttribute(Element elem, java.lang.String attr)` Deprecated. Use the more appropriately named `getElementProperty(Element, String)` instead.
`static boolean` | `getBooleanAttribute(Element elem, java.lang.String attr)` Deprecated. Use the more appropriately named `getElementPropertyBoolean(Element, String)` instead.
`static Element` | `getCaptureElement()` Gets the element that currently has mouse capture.
`static Element` | `getChild(Element parent, int index)` Gets an element's n-th child element.
`static int` | `getChildCount(Element parent)` Gets the number of child elements present in a given parent element.
`static int` | `getChildIndex(Element parent, Element child)` Gets the index of a given child element within its parent.
`static java.lang.String` | `getElementAttribute(Element elem, java.lang.String attr)` Gets the named attribute from the element.
`static Element` | `getElementById(java.lang.String id)` Gets the element associated with the given unique id within the entire document.
`static java.lang.String` | `getElementProperty(Element elem, java.lang.String prop)` Gets any named property from an element, as a string.
`static boolean` | `getElementPropertyBoolean(Element elem, java.lang.String prop)` Gets any named property from an element, as a boolean.
`static int` | `getElementPropertyInt(Element elem, java.lang.String prop)` Gets any named property from an element, as an int.
`static EventListener` | `getEventListener(Element elem)` Gets the `EventListener` that will receive events for the given element.
`static int` | `getEventsSunk(Element elem)` Gets the current set of events sunk by a given element.
`static Element` | `getFirstChild(Element elem)` Gets the first child element of the given element.
`static java.lang.String` | `getImgSrc(Element img)` Gets the src attribute of an img element.
`static java.lang.String` | `getInnerHTML(Element elem)` Gets an HTML representation of an element's children.
`static java.lang.String` | `getInnerText(Element elem)` Gets the text contained within an element.
`static int` | `getIntAttribute(Element elem, java.lang.String attr)` Deprecated. Use the more appropriately named `getElementPropertyInt(Element, String)` instead.
`static int` | `getIntStyleAttribute(Element elem, java.lang.String attr)` Gets an integer attribute on a given element's style.
`static Element` | `getNextSibling(Element elem)` Gets an element's next sibling element.
`static Element` | `getParent(Element elem)` Gets an element's parent element.
`static java.lang.String` | `getStyleAttribute(Element elem, java.lang.String attr)` Gets an attribute of the given element's style.
`static void` | `insertBefore(Element parent, Element child, Element before)` Inserts an element as a child of the given parent element, before another child of that parent.
`static void` | `insertChild(Element parent, Element child, int index)` Inserts an element as a child of the given parent element.
`static void` | `insertListItem(Element selectElem, java.lang.String item, java.lang.String value, int index)` Creates an `<option>` element and inserts it as a child of the specified `<select>` element.
`static boolean` | `isOrHasChild(Element parent, Element child)` Determine whether one element is equal to, or the child of, another.
`static void` | `releaseCapture(Element elem)` Releases mouse/touch/gesture capture on the given element.
`static void` | `removeChild(Element parent, Element child)` Removes a child element from the given parent element.
`static void` | `removeElementAttribute(Element elem, java.lang.String attr)` Removes the named attribute from the given element.
`static void` | `removeEventPreview(EventPreview preview)` Deprecated. use `HandlerRegistration` returned from `Event.addNativePreviewHandler(Event.NativePreviewHandler)`
`static void` | `scrollIntoView(Element elem)` Scrolls the given element into view.
`static void` | `setAttribute(Element elem, java.lang.String attr, java.lang.String value)` Deprecated. Use the more appropriately named `setElementProperty(Element, String, String)` instead.
`static void` | `setBooleanAttribute(Element elem, java.lang.String attr, boolean value)` Deprecated. Use the more appropriately named `setElementPropertyBoolean(Element, String, boolean)` instead.
`static void` | `setCapture(Element elem)` Sets mouse/touch/gesture capture on the given element.
`static void` | `setElementAttribute(Element elem, java.lang.String attr, java.lang.String value)` Sets an attribute on a given element.
`static void` | `setElementProperty(Element elem, java.lang.String prop, java.lang.String value)` Sets a property on the given element.
`static void` | `setElementPropertyBoolean(Element elem, java.lang.String prop, boolean value)` Sets a boolean property on the given element.
`static void` | `setElementPropertyInt(Element elem, java.lang.String prop, int value)` Sets an int property on the given element.
`static void` | `setEventListener(Element elem, EventListener listener)` Sets the `EventListener` to receive events for the given element.
`static void` | `setImgSrc(Element img, java.lang.String src)` Sets the src attribute of an img element.
`static void` | `setInnerHTML(Element elem, java.lang.String html)` Sets the HTML contained within an element.
`static void` | `setInnerText(Element elem, java.lang.String text)` Sets the text contained within an element.
`static void` | `setIntAttribute(Element elem, java.lang.String attr, int value)` Deprecated. Use the more appropriately named `setElementPropertyInt(Element, String, int)` instead.
`static void` | `setIntStyleAttribute(Element elem, java.lang.String attr, int value)` Sets an integer attribute on the given element's style.
`static void` | `setOptionText(Element select, java.lang.String text, int index)` Sets the option text of the given select object.
`static void` | `setStyleAttribute(Element elem, java.lang.String attr, java.lang.String value)` Sets an attribute on the given element's style.
`static void` | `sinkBitlessEvent(Element elem, java.lang.String eventTypeName)` Sinks a named event.
`static void` | `sinkEvents(Element elem, int eventBits)` Sets the current set of events sunk by a given element.
`static java.lang.String` | `toString(Element elem)` Returns a stringized version of the element.
`static int` | `windowGetClientHeight()` Deprecated. As of GWT 1.5, replaced by `Window.getClientHeight()`
`static int` | `windowGetClientWidth()` Deprecated. As of GWT 1.5, replaced by `Window.getClientWidth()`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### DOM

    public DOM()

Method Detail

### addEventPreview

    @Deprecated
    public static void addEventPreview(EventPreview preview)

  Deprecated. replaced by `Event.addNativePreviewHandler(Event.NativePreviewHandler)`

  Adds an event preview to the preview stack. As long as this preview remains on the top of the stack, it will receive all events before they are fired to their listeners. Note that the event preview will receive all events, including those received due to bubbling, whereas normal event handlers only receive explicitly sunk events.

  Parameters:
    `preview` - the event preview to be added to the stack.

### appendChild

    public static void appendChild(Element parent,
                                   Element child)

  Appends one element to another's list of children.

  If the child element is a `PotentialElement`, it is first resolved.

  Parameters:
    `parent` - the parent element
    `child` - its new child
  See Also:
    `PotentialElement.resolve(Element)`

### clone

    public static Element clone(Element elem,
                                boolean deep)

  Clones an element.

  Parameters:
    `elem` - the element to be cloned
    `deep` - should children be cloned as well?

### compare

    @Deprecated
    public static boolean compare(Element elem1,
                                             Element elem2)

  Deprecated. Use identity comparison.

  Compares two elements for equality. Note that this method is now deprecated because reference identity accurately reports equality.

  Parameters:
    `elem1` - the first element to be compared
    `elem2` - the second element to be compared
  Returns:
    `true` if they are in fact the same element

### createAnchor

    public static Element createAnchor()

  Creates an HTML A element.

  Returns:
    the newly-created element

### createButton

    public static Element createButton()

  Creates an HTML BUTTON element.

  Returns:
    the newly-created element

### createCaption

    public static Element createCaption()

  Creates an HTML CAPTION element.

  Returns:
    the newly-created element

### createCol

    public static Element createCol()

  Creates an HTML COL element.

  Returns:
    the newly-created element

### createColGroup

    public static Element createColGroup()

  Creates an HTML COLGROUP element.

  Returns:
    the newly-created element

### createDiv

    public static Element createDiv()

  Creates an HTML DIV element.

  Returns:
    the newly-created element

### createElement

    public static Element createElement(java.lang.String tagName)

  Creates an HTML element.

  Parameters:
    `tagName` - the HTML tag of the element to be created
  Returns:
    the newly-created element

### createFieldSet

    public static Element createFieldSet()

  Creates an HTML FIELDSET element.

  Returns:
    the newly-created element

### createForm

    public static Element createForm()

  Creates an HTML FORM element.

  Returns:
    the newly-created element

### createIFrame

    public static Element createIFrame()

  Creates an HTML IFRAME element.

  Returns:
    the newly-created element

### createImg

    public static Element createImg()

  Creates an HTML IMG element.

  Returns:
    the newly-created element

### createInputCheck

    public static Element createInputCheck()

  Creates an HTML INPUT type='CHECK' element.

  Returns:
    the newly-created element

### createInputPassword

    public static Element createInputPassword()

  Creates an HTML INPUT type='PASSWORD' element.

  Returns:
    the newly-created element

### createInputRadio

    public static Element createInputRadio(java.lang.String name)

  Creates an HTML INPUT type='RADIO' element.

  Parameters:
    `name` - the name of the group with which this radio button will be associated
  Returns:
    the newly-created element

### createInputText

    public static Element createInputText()

  Creates an HTML INPUT type='TEXT' element.

  Returns:
    the newly-created element

### createLabel

    public static Element createLabel()

  Creates an HTML LABEL element.

  Returns:
    the newly-created element

### createLegend

    public static Element createLegend()

  Creates an HTML LEGEND element.

  Returns:
    the newly-created element

### createOption

    public static Element createOption()

  Creates an HTML OPTION element.

  Returns:
    the newly-created element

### createOptions

    @Deprecated
    public static Element createOptions()

  Deprecated. there is no "options" element; use `createOption()` instead

  Creates an HTML OPTIONS element.

  Returns:
    the newly-created element

### createSelect

    public static Element createSelect()

  Creates a single-selection HTML SELECT element. Equivalent to

       createSelect(false)

  Returns:
    the newly-created element

### createSelect

    public static Element createSelect(boolean multiple)

  Creates an HTML SELECT element.

  Parameters:
    `multiple` - true if multiple selection of options is allowed
  Returns:
    the newly-created element

### createSpan

    public static Element createSpan()

  Creates an HTML SPAN element.

  Returns:
    the newly-created element

### createTable

    public static Element createTable()

  Creates an HTML TABLE element.

  Returns:
    the newly-created element

### createTBody

    public static Element createTBody()

  Creates an HTML TBODY element.

  Returns:
    the newly-created element

### createTD

    public static Element createTD()

  Creates an HTML TD element.

  Returns:
    the newly-created element

### createTextArea

    public static Element createTextArea()

  Creates an HTML TEXTAREA element.

  Returns:
    the newly-created element

### createTFoot

    public static Element createTFoot()

  Creates an HTML TFOOT element.

  Returns:
    the newly-created element

### createTH

    public static Element createTH()

  Creates an HTML TH element.

  Returns:
    the newly-created element

### createTHead

    public static Element createTHead()

  Creates an HTML THEAD element.

  Returns:
    the newly-created element

### createTR

    public static Element createTR()

  Creates an HTML TR element.

  Returns:
    the newly-created element

### createUniqueId

    public static java.lang.String createUniqueId()

  Generates a unique DOM id. The id is of the form "gwt-id-".

  Returns:
    a unique DOM id

### eventCancelBubble

    public static void eventCancelBubble(Event evt,
                                         boolean cancel)

  Cancels bubbling for the given event. This will stop the event from being propagated to parent elements.

  Parameters:
    `evt` - the event on which to cancel bubbling
    `cancel` - `true` to cancel bubbling

### eventGetAltKey

    public static boolean eventGetAltKey(Event evt)

  Gets whether the ALT key was depressed when the given event occurred.

  Parameters:
    `evt` - the event to be tested
  Returns:
    `true` if ALT was depressed when the event occurred

### eventGetButton

    public static int eventGetButton(Event evt)

  Gets the mouse buttons that were depressed when the given event occurred.

  Parameters:
    `evt` - the event to be tested
  Returns:
    a bit-field, defined by `NativeEvent.BUTTON_LEFT`, `NativeEvent.BUTTON_MIDDLE`, and `NativeEvent.BUTTON_RIGHT`

### eventGetClientX

    public static int eventGetClientX(Event evt)

  Gets the mouse x-position within the browser window's client area.

  Parameters:
    `evt` - the event to be tested
  Returns:
    the mouse x-position

### eventGetClientY

    public static int eventGetClientY(Event evt)

  Gets the mouse y-position within the browser window's client area.

  Parameters:
    `evt` - the event to be tested
  Returns:
    the mouse y-position

### eventGetCtrlKey

    public static boolean eventGetCtrlKey(Event evt)

  Gets whether the CTRL key was depressed when the given event occurred.

  Parameters:
    `evt` - the event to be tested
  Returns:
    `true` if CTRL was depressed when the event occurred

### eventGetCurrentEvent

    public static Event eventGetCurrentEvent()

  Gets the current event that is being fired. The current event is only available within the lifetime of the onBrowserEvent function. Once the onBrowserEvent method returns, the current event is reset to null.

  Returns:
    the current event

### eventGetCurrentTarget

    public static Element eventGetCurrentTarget(Event evt)

  Gets the current target element of the given event. This is the element whose listener fired last, not the element which fired the event initially.

  Parameters:
    `evt` - the event
  Returns:
    the event's current target element
  See Also:
    `eventGetTarget(Event)`

### eventGetFromElement

    public static Element eventGetFromElement(Event evt)

  Gets the element from which the mouse pointer was moved (valid for `Event.ONMOUSEOVER` and `Event.ONMOUSEOUT`).

  Parameters:
    `evt` - the event to be tested
  Returns:
    the element from which the mouse pointer was moved

### eventGetKeyCode

    public static int eventGetKeyCode(Event evt)

  Gets the key code associated with this event.

  For `Event.ONKEYPRESS`, this method returns the Unicode value of the character generated. For `Event.ONKEYDOWN` and `Event.ONKEYUP`, it returns the code associated with the physical key.

  Parameters:
    `evt` - the event to be tested
  Returns:
    the Unicode character or key code.
  See Also:
    `KeyboardListener`

### eventGetMetaKey

    public static boolean eventGetMetaKey(Event evt)

  Gets whether the META key was depressed when the given event occurred.

  Parameters:
    `evt` - the event to be tested
  Returns:
    `true` if META was depressed when the event occurred

### eventGetMouseWheelVelocityY

    public static int eventGetMouseWheelVelocityY(Event evt)

  Gets the velocity of the mouse wheel associated with the event along the Y axis.

  The velocity of the event is an artifical measurement for relative comparisons of wheel activity. It is affected by some non-browser factors, including choice of input hardware and mouse acceleration settings. The sign of the velocity measurement agrees with the screen coordinate system; negative values are towards the origin and positive values are away from the origin. Standard scrolling speed is approximately ten units per event.

  Parameters:
    `evt` - the event to be examined.
  Returns:
    The velocity of the mouse wheel.

### eventGetRepeat

    @Deprecated
    public static boolean eventGetRepeat(Event evt)

  Deprecated. not supported in any browser but IE

  Gets the key-repeat state of this event. Only IE supports this attribute.

  Parameters:
    `evt` - the event to be tested
  Returns:
    `true` if this key event was an auto-repeat

### eventGetScreenX

    public static int eventGetScreenX(Event evt)

  Gets the mouse x-position on the user's display.

  Parameters:
    `evt` - the event to be tested
  Returns:
    the mouse x-position

### eventGetScreenY

    public static int eventGetScreenY(Event evt)

  Gets the mouse y-position on the user's display.

  Parameters:
    `evt` - the event to be tested
  Returns:
    the mouse y-position

### eventGetShiftKey

    public static boolean eventGetShiftKey(Event evt)

  Gets whether the shift key was depressed when the given event occurred.

  Parameters:
    `evt` - the event to be tested
  Returns:
    `true` if shift was depressed when the event occurred

### eventGetTarget

    public static Element eventGetTarget(Event evt)

  Returns the element that was the actual target of the given event.

  Parameters:
    `evt` - the event to be tested
  Returns:
    the target element

### eventGetToElement

    public static Element eventGetToElement(Event evt)

  Gets the element to which the mouse pointer was moved (only valid for `Event.ONMOUSEOUT` and `Event.ONMOUSEOVER`).

  Parameters:
    `evt` - the event to be tested
  Returns:
    the element to which the mouse pointer was moved

### eventGetType

    public static int eventGetType(Event evt)

  Gets the enumerated type of this event (as defined in `Event`).

  Parameters:
    `evt` - the event to be tested
  Returns:
    the event's enumerated type, or -1 if not defined

### eventGetTypeString

    public static java.lang.String eventGetTypeString(Event evt)

  Gets the type of the given event as a string.

  Parameters:
    `evt` - the event to be tested
  Returns:
    the event's type name

### eventPreventDefault

    public static void eventPreventDefault(Event evt)

  Prevents the browser from taking its default action for the given event.

  Parameters:
    `evt` - the event whose default action is to be prevented

### eventSetKeyCode

    @Deprecated
    public static void eventSetKeyCode(Event evt,
                                                  char key)

  Deprecated. this method only works in IE and should not have been added to the API

  Sets the key code associated with the given keyboard event.

  Parameters:
    `evt` - the event whose key code is to be set
    `key` - the new key code

### eventToString

    public static java.lang.String eventToString(Event evt)

  Returns a stringized version of the event. This string is for debugging purposes and will NOT be consistent on different browsers.

  Parameters:
    `evt` - the event to stringize
  Returns:
    a string form of the event

### getAbsoluteLeft

    public static int getAbsoluteLeft(Element elem)

  Gets an element's absolute left coordinate in the document's coordinate system.

  Parameters:
    `elem` - the element to be measured
  Returns:
    the element's absolute left coordinate

### getAbsoluteTop

    public static int getAbsoluteTop(Element elem)

  Gets an element's absolute top coordinate in the document's coordinate system.

  Parameters:
    `elem` - the element to be measured
  Returns:
    the element's absolute top coordinate

### getAttribute

    @Deprecated
    public static java.lang.String getAttribute(Element elem,
                                                           java.lang.String attr)

  Deprecated. Use the more appropriately named `getElementProperty(Element, String)` instead.

  Gets any named attribute from an element, as a string.

  Parameters:
    `elem` - the element whose attribute is to be retrieved
    `attr` - the name of the attribute
  Returns:
    the attribute's value

### getBooleanAttribute

    @Deprecated
    public static boolean getBooleanAttribute(Element elem,
                                                         java.lang.String attr)

  Deprecated. Use the more appropriately named `getElementPropertyBoolean(Element, String)` instead.

  Gets a boolean attribute on the given element.

  Parameters:
    `elem` - the element whose attribute is to be set
    `attr` - the name of the attribute to be set
  Returns:
    the attribute's value as a boolean

### getCaptureElement

    public static Element getCaptureElement()

  Gets the element that currently has mouse capture.

  Returns:
    a handle to the capture element, or `null` if none exists

### getChild

    public static Element getChild(Element parent,
                                   int index)

  Gets an element's n-th child element.

  Parameters:
    `parent` - the element whose child is to be retrieved
    `index` - the index of the child element
  Returns:
    the n-th child element

### getChildCount

    public static int getChildCount(Element parent)

  Gets the number of child elements present in a given parent element.

  Parameters:
    `parent` - the element whose children are to be counted
  Returns:
    the number of children

### getChildIndex

    public static int getChildIndex(Element parent,
                                    Element child)

  Gets the index of a given child element within its parent.

  Parameters:
    `parent` - the parent element
    `child` - the child element
  Returns:
    the child's index within its parent, or `-1` if it is not a child of the given parent

### getElementAttribute

    public static java.lang.String getElementAttribute(Element elem,
                                                       java.lang.String attr)

  Gets the named attribute from the element.

  Parameters:
    `elem` - the element whose property is to be retrieved
    `attr` - the name of the attribute
  Returns:
    the value of the attribute

### getElementById

    public static Element getElementById(java.lang.String id)

  Gets the element associated with the given unique id within the entire document.

  Parameters:
    `id` - the id whose associated element is to be retrieved
  Returns:
    the associated element, or `null` if none is found

### getElementProperty

    public static java.lang.String getElementProperty(Element elem,
                                                      java.lang.String prop)

  Gets any named property from an element, as a string.

  Parameters:
    `elem` - the element whose property is to be retrieved
    `prop` - the name of the property
  Returns:
    the property's value

### getElementPropertyBoolean

    public static boolean getElementPropertyBoolean(Element elem,
                                                    java.lang.String prop)

  Gets any named property from an element, as a boolean.

  Parameters:
    `elem` - the element whose property is to be retrieved
    `prop` - the name of the property
  Returns:
    the property's value as a boolean

### getElementPropertyInt

    public static int getElementPropertyInt(Element elem,
                                            java.lang.String prop)

  Gets any named property from an element, as an int.

  Parameters:
    `elem` - the element whose property is to be retrieved
    `prop` - the name of the property
  Returns:
    the property's value as an int

### getEventListener

    public static EventListener getEventListener(Element elem)

  Gets the `EventListener` that will receive events for the given element. Only one such listener may exist for a single element.

  Parameters:
    `elem` - the element whose listener is to be set
  Returns:
    the element's event listener

### getEventsSunk

    public static int getEventsSunk(Element elem)

  Gets the current set of events sunk by a given element.

  Parameters:
    `elem` - the element whose events are to be retrieved
  Returns:
    a bitfield describing the events sunk on this element (its possible values are described in `Event`)

### getFirstChild

    public static Element getFirstChild(Element elem)

  Gets the first child element of the given element.

  Parameters:
    `elem` - the element whose child is to be retrieved
  Returns:
    the child element

### getImgSrc

    public static java.lang.String getImgSrc(Element img)

  Gets the src attribute of an img element. This method is paired with `setImgSrc(Element, String)` so that it always returns the correct url.

  Parameters:
    `img` - a non-null img whose src attribute is to be read.
  Returns:
    the src url of the img

### getInnerHTML

    public static java.lang.String getInnerHTML(Element elem)

  Gets an HTML representation of an element's children.

  Parameters:
    `elem` - the element whose HTML is to be retrieved
  Returns:
    the HTML representation of the element's children

### getInnerText

    public static java.lang.String getInnerText(Element elem)

  Gets the text contained within an element. If the element has child elements, only the text between them will be retrieved.

  Parameters:
    `elem` - the element whose inner text is to be retrieved
  Returns:
    the text inside this element

### getIntAttribute

    @Deprecated
    public static int getIntAttribute(Element elem,
                                                 java.lang.String attr)

  Deprecated. Use the more appropriately named `getElementPropertyInt(Element, String)` instead.

  Gets an integer attribute on a given element.

  Parameters:
    `elem` - the element whose attribute is to be retrieved
    `attr` - the name of the attribute to be retrieved
  Returns:
    the attribute's value as an integer

### getIntStyleAttribute

    public static int getIntStyleAttribute(Element elem,
                                           java.lang.String attr)

  Gets an integer attribute on a given element's style.

  Parameters:
    `elem` - the element whose style attribute is to be retrieved
    `attr` - the name of the attribute to be retrieved
  Returns:
    the style attribute's value as an integer

### getNextSibling

    public static Element getNextSibling(Element elem)

  Gets an element's next sibling element.

  Parameters:
    `elem` - the element whose sibling is to be retrieved
  Returns:
    the sibling element

### getParent

    public static Element getParent(Element elem)

  Gets an element's parent element.

  Parameters:
    `elem` - the element whose parent is to be retrieved
  Returns:
    the parent element

### getStyleAttribute

    public static java.lang.String getStyleAttribute(Element elem,
                                                     java.lang.String attr)

  Gets an attribute of the given element's style.

  Parameters:
    `elem` - the element whose style attribute is to be retrieved
    `attr` - the name of the style attribute to be retrieved
  Returns:
    the style attribute's value

### insertBefore

    public static void insertBefore(Element parent,
                                    Element child,
                                    Element before)

  Inserts an element as a child of the given parent element, before another child of that parent.

  If the child element is a `PotentialElement`, it is first resolved.

  Parameters:
    `parent` - the parent element
    `child` - the child element to add to `parent`
    `before` - an existing child element of `parent` before which `child` will be inserted
  See Also:
    `PotentialElement.resolve(Element)`

### insertChild

    public static void insertChild(Element parent,
                                   Element child,
                                   int index)

  Inserts an element as a child of the given parent element.

  If the child element is a `PotentialElement`, it is first resolved.

  Parameters:
    `parent` - the parent element
    `child` - the child element to add to `parent`
    `index` - the index before which the child will be inserted (any value greater than the number of existing children will cause the child to be appended)
  See Also:
    `PotentialElement.resolve(Element)`

### insertListItem

    public static void insertListItem(Element selectElem,
                                      java.lang.String item,
                                      java.lang.String value,
                                      int index)

  Creates an `<option>` element and inserts it as a child of the specified `<select>` element. If the index is less than zero, or greater than or equal to the length of the list, then the option element will be appended to the end of the list.

  Parameters:
    `selectElem` - the `<select>` element
    `item` - the text of the new item; cannot be `null`
    `value` - the `value` attribute for the new `<option>`; cannot be `null`
    `index` - the index at which to insert the child

### isOrHasChild

    public static boolean isOrHasChild(Element parent,
                                       Element child)

  Determine whether one element is equal to, or the child of, another.

  Parameters:
    `parent` - the potential parent element
    `child` - the potential child element
  Returns:
    `true` if the relationship holds

### releaseCapture

    public static void releaseCapture(Element elem)

  Releases mouse/touch/gesture capture on the given element. Calling this method has no effect if the element does not currently have mouse/touch/gesture capture.

  Parameters:
    `elem` - the element to release capture
  See Also:
    `setCapture(Element)`

### removeChild

    public static void removeChild(Element parent,
                                   Element child)

  Removes a child element from the given parent element.

  Parameters:
    `parent` - the parent element
    `child` - the child element to be removed

### removeElementAttribute

    public static void removeElementAttribute(Element elem,
                                              java.lang.String attr)

  Removes the named attribute from the given element.

  Parameters:
    `elem` - the element whose attribute is to be removed
    `attr` - the name of the element to remove

### removeEventPreview

    @Deprecated
    public static void removeEventPreview(EventPreview preview)

  Deprecated. use `HandlerRegistration` returned from `Event.addNativePreviewHandler(Event.NativePreviewHandler)`

  Removes an element from the preview stack. This element will no longer capture events, though any preview underneath it will begin to do so.

  Parameters:
    `preview` - the event preview to be removed from the stack

### scrollIntoView

    public static void scrollIntoView(Element elem)

  Scrolls the given element into view.

  This method crawls up the DOM hierarchy, adjusting the scrollLeft and scrollTop properties of each scrollable element to ensure that the specified element is completely in view. It adjusts each scroll position by the minimum amount necessary.

  Parameters:
    `elem` - the element to be made visible

### setAttribute

    @Deprecated
    public static void setAttribute(Element elem,
                                               java.lang.String attr,
                                               java.lang.String value)

  Deprecated. Use the more appropriately named `setElementProperty(Element, String, String)` instead.

  Sets an attribute on the given element.

  Parameters:
    `elem` - the element whose attribute is to be set
    `attr` - the name of the attribute to be set
    `value` - the new attribute value

### setBooleanAttribute

    @Deprecated
    public static void setBooleanAttribute(Element elem,
                                                      java.lang.String attr,
                                                      boolean value)

  Deprecated. Use the more appropriately named `setElementPropertyBoolean(Element, String, boolean)` instead.

  Sets a boolean attribute on the given element.

  Parameters:
    `elem` - the element whose attribute is to be set
    `attr` - the name of the attribute to be set
    `value` - the attribute's new boolean value

### setCapture

    public static void setCapture(Element elem)

  Sets mouse/touch/gesture capture on the given element. This element will directly receive all mouse events until `releaseCapture(Element)` is called on it.

  Parameters:
    `elem` - the element on which to set mouse/touch/gesture capture

### setElementAttribute

    public static void setElementAttribute(Element elem,
                                           java.lang.String attr,
                                           java.lang.String value)

  Sets an attribute on a given element.

  Parameters:
    `elem` - element whose attribute is to be set
    `attr` - the name of the attribute
    `value` - the value to which the attribute should be set

### setElementProperty

    public static void setElementProperty(Element elem,
                                          java.lang.String prop,
                                          java.lang.String value)

  Sets a property on the given element.

  Parameters:
    `elem` - the element whose property is to be set
    `prop` - the name of the property to be set
    `value` - the new property value

### setElementPropertyBoolean

    public static void setElementPropertyBoolean(Element elem,
                                                 java.lang.String prop,
                                                 boolean value)

  Sets a boolean property on the given element.

  Parameters:
    `elem` - the element whose property is to be set
    `prop` - the name of the property to be set
    `value` - the new property value as a boolean

### setElementPropertyInt

    public static void setElementPropertyInt(Element elem,
                                             java.lang.String prop,
                                             int value)

  Sets an int property on the given element.

  Parameters:
    `elem` - the element whose property is to be set
    `prop` - the name of the property to be set
    `value` - the new property value as an int

### setEventListener

    public static void setEventListener(Element elem,
                                        EventListener listener)

  Sets the `EventListener` to receive events for the given element. Only one such listener may exist for a single element.

  Parameters:
    `elem` - the element whose listener is to be set
    `listener` - the listener to receive `events`

### setImgSrc

    public static void setImgSrc(Element img,
                                 java.lang.String src)

  Sets the src attribute of an img element. This method ensures that imgs only ever have their contents requested one single time from the server.

  Parameters:
    `img` - a non-null img whose src attribute will be set.
    `src` - a non-null url for the img

### setInnerHTML

    public static void setInnerHTML(Element elem,
                                    java.lang.String html)

  Sets the HTML contained within an element.

  Parameters:
    `elem` - the element whose inner HTML is to be set
    `html` - the new html

### setInnerText

    public static void setInnerText(Element elem,
                                    java.lang.String text)

  Sets the text contained within an element. If the element already has children, they will be destroyed.

  Parameters:
    `elem` - the element whose inner text is to be set
    `text` - the new text

### setIntAttribute

    @Deprecated
    public static void setIntAttribute(Element elem,
                                                  java.lang.String attr,
                                                  int value)

  Deprecated. Use the more appropriately named `setElementPropertyInt(Element, String, int)` instead.

  Sets an integer attribute on the given element.

  Parameters:
    `elem` - the element whose attribute is to be set
    `attr` - the name of the attribute to be set
    `value` - the attribute's new integer value

### setIntStyleAttribute

    public static void setIntStyleAttribute(Element elem,
                                            java.lang.String attr,
                                            int value)

  Sets an integer attribute on the given element's style.

  Parameters:
    `elem` - the element whose style attribute is to be set
    `attr` - the name of the style attribute to be set
    `value` - the style attribute's new integer value

### setOptionText

    public static void setOptionText(Element select,
                                     java.lang.String text,
                                     int index)

  Sets the option text of the given select object.

  Parameters:
    `select` - the select object whose option text is being set
    `text` - the text to set
    `index` - the index of the option whose text should be set

### setStyleAttribute

    public static void setStyleAttribute(Element elem,
                                         java.lang.String attr,
                                         java.lang.String value)

  Sets an attribute on the given element's style.

  Parameters:
    `elem` - the element whose style attribute is to be set
    `attr` - the name of the style attribute to be set
    `value` - the style attribute's new value

### sinkBitlessEvent

    public static void sinkBitlessEvent(Element elem,
                                        java.lang.String eventTypeName)

  Sinks a named event. Events will be fired to the nearest `EventListener` specified on any of the element's parents.

  Parameters:
    `elem` - the element whose events are to be retrieved
    `eventTypeName` - name of the event to sink on this element

### sinkEvents

    public static void sinkEvents(Element elem,
                                  int eventBits)

  Sets the current set of events sunk by a given element. These events will be fired to the nearest `EventListener` specified on any of the element's parents.

  Parameters:
    `elem` - the element whose events are to be retrieved
    `eventBits` - a bitfield describing the events sunk on this element (its possible values are described in `Event`)

### toString

    public static java.lang.String toString(Element elem)

  Returns a stringized version of the element. This string is for debugging purposes and will NOT be consistent on different browsers.

  Parameters:
    `elem` - the element to stringize
  Returns:
    a string form of the element

### windowGetClientHeight

    @Deprecated
    public static int windowGetClientHeight()

  Deprecated. As of GWT 1.5, replaced by `Window.getClientHeight()`

### windowGetClientWidth

    @Deprecated
    public static int windowGetClientWidth()

  Deprecated. As of GWT 1.5, replaced by `Window.getClientWidth()`

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