DocumentType: systemId property
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 read-only systemId
property of the DocumentType
returns the URL of the associated DTD.
For synthetic DocumentType
, this property reflects the value given in parameter to DOMImplementation.createDocumentType()
.
Value
A string.
Examples
js
const docType = document.implementation.createDocumentType(
"svg",
"",
"http://www.w3.org/2000/svg",
);
console.log(docType.systemId); // Displays "http://www.w3.org/2000/svg"
Specifications
Specification |
---|
DOM Standard # dom-documenttype-systemid |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
systemId |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.