Document: prepend() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The Document.prepend() method inserts a set of Node objects or strings before the first child of the document. Strings are inserted as equivalent Text nodes.

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

Syntax

js
prepend(param1)
prepend(param1, param2)
prepend(param1, param2, /* …, */ paramN)

Parameters

param1, …, paramN

A set of Node objects or strings to insert.

Return value

None (undefined).

Exceptions

HierarchyRequestError DOMException

Thrown when the node cannot be inserted at the specified point in the hierarchy.

Examples

Prepending a root element to a document

If you try to prepend 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.prepend(html);
// HierarchyRequestError: The operation would yield an incorrect node tree.

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

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

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

Specifications

Specification
DOM
# ref-for-dom-parentnode-prepend①

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
prepend

Legend

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Full support
Full support

See also