Syntax
js
append(param1)
append(param1, param2)
append(param1, param2, /* …, */ paramN)
Parameters
param1, …,paramN-
A set of
Nodeobjects or strings to insert.
Return value
None (undefined).
Exceptions
HierarchyRequestErrorDOMException-
Thrown when the node cannot be inserted at the specified point in the hierarchy.
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 DOMException given a <html> element already exists.
js
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):
js
let doc = new Document();
let html = document.createElement("html");
doc.append(html);
doc.children; // HTMLCollection [<html>]
Specifications
| Specification |
|---|
| DOM # ref-for-dom-parentnode-append① |