Document.append()

The Document.append() method inserts a set of Node objects or DOMString objects after the last child of the document. DOMString objects are inserted as equivalent Text nodes.

This method appends a child to a Document. To append to an arbitrary element in the tree, see Element.append().

Syntax

append(...nodesOrDOMStrings)

Parameters

nodesOrDOMStrings
A set of Node or DOMString objects to insert.

Exceptions

Examples

Appending a root element to a document

If you try to append an element to an existing HTML document, it might throw a HierarchyRequestError given a <html> element already exists.

let html = document.createElement("html");
document.append(html);
// HierarchyRequestError: The operation would yield an incorrect node tree.

If you are creating a new document without any existing element, you can append a root HTML element (or a root SVG element):

let doc = new Document();
let html = document.createElement("html");
doc.append(html);

doc.children; // HTMLCollection [<html>]

Specifications

Specification
DOM Standard (DOM)
# ref-for-dom-parentnode-append①

Browser compatibility

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See also