Document: createCDATASection() 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.

createCDATASection() creates a new CDATA section node, and returns it.

Syntax

js
createCDATASection(data)

Parameters

data

A string containing the data to be added to the CDATA Section.

Return value

Examples

js
const doc = new DOMParser().parseFromString("<xml></xml>", "application/xml");
const cdata = doc.createCDATASection("Some <CDATA> data & then some");
doc.querySelector("xml").appendChild(cdata);
console.log(new XMLSerializer().serializeToString(doc));
// Displays: <xml><![CDATA[Some <CDATA> data & then some]]></xml>

Notes

  • This will only work with XML, not HTML documents (as HTML documents do not support CDATA sections); attempting it on an HTML document will throw NOT_SUPPORTED_ERR.
  • Will throw a NS_ERROR_DOM_INVALID_CHARACTER_ERR exception if one tries to submit the closing CDATA sequence (]]>) as part of the data, so unescaped user-provided data cannot be safely used without this method getting this exception (createTextNode() can often be used in its place).

Specifications

Specification
DOM
# ref-for-dom-document-createcomment①

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
createCDATASection

Legend

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Full support
Full support