Element Interface

Instance properties

Element inherits properties from its parent interface, Node, and by extension that interface's parent, EventTarget.

Element.assignedSlot Read only

Returns a HTMLSlotElement representing the <slot> the node is inserted in.

Element.attributes Read only

Returns a NamedNodeMap object containing the assigned attributes of the corresponding HTML element.

Element.childElementCount Read only

Returns the number of child elements of this element.

Element.children Read only

Returns the child elements of this element.

Element.classList Read only

Returns a DOMTokenList containing the list of class attributes.

Element.className

A string representing the class of the element.

Element.clientHeight Read only

Returns a number representing the inner height of the element.

Element.clientLeft Read only

Returns a number representing the width of the left border of the element.

Element.clientTop Read only

Returns a number representing the width of the top border of the element.

Element.clientWidth Read only

Returns a number representing the inner width of the element.

Element.elementTiming Experimental

A string reflecting the elementtiming attribute which marks an element for observation in the PerformanceElementTiming API.

Element.firstElementChild Read only

Returns the first child element of this element.

Element.id

A string representing the id of the element.

Element.innerHTML

A string representing the markup of the element's content.

Element.lastElementChild Read only

Returns the last child element of this element.

Element.localName Read only

A string representing the local part of the qualified name of the element.

Element.namespaceURI Read only

The namespace URI of the element, or null if it is no namespace.

Note: In Firefox 3.5 and earlier, HTML elements are in no namespace. In later versions, HTML elements are in the http://www.w3.org/1999/xhtml namespace in both HTML and XML trees.

Element.nextElementSibling Read only

An Element, the element immediately following the given one in the tree, or null if there's no sibling node.

Element.outerHTML

A string representing the markup of the element including its content. When used as a setter, replaces the element with nodes parsed from the given string.

Element.part

Represents the part identifier(s) of the element (i.e. set using the part attribute), returned as a DOMTokenList.

Element.prefix Read only

A string representing the namespace prefix of the element, or null if no prefix is specified.

Element.previousElementSibling Read only

An Element, the element immediately preceding the given one in the tree, or null if there is no sibling element.

Element.scrollHeight Read only

Returns a number representing the scroll view height of an element.

Element.scrollLeft

A number representing the left scroll offset of the element.

Element.scrollLeftMax Non-standard Read only

Returns a number representing the maximum left scroll offset possible for the element.

Element.scrollTop

A number representing number of pixels the top of the element is scrolled vertically.

Element.scrollTopMax Non-standard Read only

Returns a number representing the maximum top scroll offset possible for the element.

Element.scrollWidth Read only

Returns a number representing the scroll view width of the element.

Element.shadowRoot Read only

Returns the open shadow root that is hosted by the element, or null if no open shadow root is present.

Element.slot

Returns the name of the shadow DOM slot the element is inserted in.

Element.tagName Read only

Returns a string with the name of the tag for the given element.

Instance properties included from ARIA

The Element interface includes the following properties, defined on the ARIAMixin mixin.

Element.ariaAtomic: A string reflecting the aria-atomic attribute, which indicates whether assistive technologies will present all, or only parts of, the changed region based on the change notifications defined by the aria-relevant attribute.
Element.ariaAutoComplete: A string reflecting the aria-autocomplete attribute, which indicates whether inputting text could trigger display of one or more predictions of the user's intended value for a combobox, searchbox, or textbox and specifies how predictions would be presented if they were made.
Element.ariaBusy: A string reflecting the aria-busy attribute, which indicates whether an element is being modified, as assistive technologies may want to wait until the modifications are complete before exposing them to the user.
Element.ariaChecked: A string reflecting the aria-checked attribute, which indicates the current "checked" state of checkboxes, radio buttons, and other widgets that have a checked state.
Element.ariaColCount: A string reflecting the aria-colcount attribute, which defines the number of columns in a table, grid, or treegrid.
Element.ariaColIndex: A string reflecting the aria-colindex attribute, which defines an element's column index or position with respect to the total number of columns within a table, grid, or treegrid.
Element.ariaColSpan: A string reflecting the aria-colspan attribute, which defines the number of columns spanned by a cell or gridcell within a table, grid, or treegrid.
Element.ariaCurrent: A string reflecting the aria-current attribute, which indicates the element that represents the current item within a container or set of related elements.
Element.ariaDescription: A string reflecting the aria-description attribute, which defines a string value that describes or annotates the current element.
Element.ariaDisabled: A string reflecting the aria-disabled attribute, which indicates that the element is perceivable but disabled, so it is not editable or otherwise operable.
Element.ariaExpanded: A string reflecting the aria-expanded attribute, which indicates whether a grouping element owned or controlled by this element is expanded or collapsed.
Element.ariaHasPopup: A string reflecting the aria-haspopup attribute, which indicates the availability and type of interactive popup element, such as menu or dialog, that can be triggered by an element.
Element.ariaHidden: A string reflecting the aria-hidden attribute, which indicates whether the element is exposed to an accessibility API.
Element.ariaKeyShortcuts: A string reflecting the aria-keyshortcuts attribute, which indicates keyboard shortcuts that an author has implemented to activate or give focus to an element.
Element.ariaLabel: A string reflecting the aria-label attribute, which defines a string value that labels the current element.
Element.ariaLevel: A string reflecting the aria-level attribute, which defines the hierarchical level of an element within a structure.
Element.ariaLive: A string reflecting the aria-live attribute, which indicates that an element will be updated, and describes the types of updates the user agents, assistive technologies, and user can expect from the live region.
Element.ariaModal: A string reflecting the aria-modal attribute, which indicates whether an element is modal when displayed.
Element.ariaMultiline: A string reflecting the aria-multiline attribute, which indicates whether a text box accepts multiple lines of input or only a single line.
Element.ariaMultiSelectable: A string reflecting the aria-multiselectable attribute, which indicates that the user may select more than one item from the current selectable descendants.
Element.ariaOrientation: A string reflecting the aria-orientation attribute, which indicates whether the element's orientation is horizontal, vertical, or unknown/ambiguous.
Element.ariaPlaceholder: A string reflecting the aria-placeholder attribute, which defines a short hint intended to aid the user with data entry when the control has no value.
Element.ariaPosInSet: A string reflecting the aria-posinset attribute, which defines an element's number or position in the current set of listitems or treeitems.
Element.ariaPressed: A string reflecting the aria-pressed attribute, which indicates the current "pressed" state of toggle buttons.
Element.ariaReadOnly: A string reflecting the aria-readonly attribute, which indicates that the element is not editable, but is otherwise operable.
Element.ariaRelevant Non-standard: A string reflecting the aria-relevant attribute, which indicates what notifications the user agent will trigger when the accessibility tree within a live region is modified. This is used to describe what changes in an aria-live region are relevant and should be announced.
Element.ariaRequired: A string reflecting the aria-required attribute, which indicates that user input is required on the element before a form may be submitted.
Element.ariaRoleDescription: A string reflecting the aria-roledescription attribute, which defines a human-readable, author-localized description for the role of an element.
Element.ariaRowCount: A string reflecting the aria-rowcount attribute, which defines the total number of rows in a table, grid, or treegrid.
Element.ariaRowIndex: A string reflecting the aria-rowindex attribute, which defines an element's row index or position with respect to the total number of rows within a table, grid, or treegrid.
Element.ariaRowSpan: A string reflecting the aria-rowspan attribute, which defines the number of rows spanned by a cell or gridcell within a table, grid, or treegrid.
Element.ariaSelected: A string reflecting the aria-selected attribute, which indicates the current "selected" state of elements that have a selected state.
Element.ariaSetSize: A string reflecting the aria-setsize attribute, which defines the number of items in the current set of listitems or treeitems.
Element.ariaSort: A string reflecting the aria-sort attribute, which indicates if items in a table or grid are sorted in ascending or descending order.
Element.ariaValueMax: A string reflecting the aria-valueMax attribute, which defines the maximum allowed value for a range widget.
Element.ariaValueMin: A string reflecting the aria-valueMin attribute, which defines the minimum allowed value for a range widget.
Element.ariaValueNow: A string reflecting the aria-valueNow attribute, which defines the current value for a range widget.
Element.ariaValueText: A string reflecting the aria-valuetext attribute, which defines the human-readable text alternative of aria-valuenow for a range widget.