ParentNode - Web APIs 编辑

The ParentNode mixin contains methods and properties that are common to all types of Node objects that can have children. It's implemented by Element, Document, and DocumentFragment objects.

See Locating DOM elements using selectors to learn how to use CSS selectors to find nodes or elements of interest.

Properties

ParentNode.childElementCount Read only

Returns the number of children of this ParentNode which are elements.

ParentNode.children Read only

Returns a live HTMLCollection containing all of the Element objects that are children of this ParentNode, omitting all of its non-element nodes.

ParentNode.firstElementChild Read only

Returns the first node which is both a child of this ParentNode and is also an Element, or null if there is none.

ParentNode.lastElementChild Read only

Returns the last node which is both a child of this ParentNode and is an Element, or null if there is none.

Methods

ParentNode.append()

Inserts a set of Node objects or DOMString objects after the last child of the ParentNode. DOMString objects are inserted as equivalent Text nodes.

ParentNode.prepend()

Inserts a set of Node objects or DOMString objects before the first child of the ParentNode. DOMString objects are inserted as equivalent Text nodes.

ParentNode.querySelector()

Returns the first Element with the current element as root that matches the specified group of selectors.

ParentNode.querySelectorAll()

Returns a NodeList representing a list of elements with the current element as root that matches the specified group of selectors.

ParentNode.replaceChildren()

Replaces the existing children of a node with a specified new set of children.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• The ChildNode pure interface.
• Object types implementing this mixin: Document, Element, and DocumentFragment.