DOMParser

DOMParser is a web platform API that provides a way to parse a string of markup into a DOM Document. It is part of the browser’s standard DOM APIs and can be accessed by creating a new instance via new DOMParser().

The primary method is parseFromString, which takes two arguments: the markup string and a MIME type indicating how to parse the string. Common MIME types include "text/html" for HTML parsing and "text/xml" or "application/xml" for XML parsing. Some browsers also support "image/svg+xml" for SVG content. The behavior varies with the type: "text/html" uses the HTML parser, while XML types use the XML parser.

The result of parseFromString is a separate Document object. It does not execute scripts or load external resources. For XML documents, you can inspect the document element and traverse the resulting tree. If parsing fails, some browsers insert a parsererror element in the returned document. The document is not automatically integrated into the current page, though nodes can be imported if needed with document.importNode.

Usage examples are common for extracting data from strings or cleaning up fragments for templating. For example: var parser = new DOMParser(); var doc = parser.parseFromString("<root><child/></root>", "text/xml"); You can then access doc.documentElement and navigate its structure.

DOMParser is widely supported in modern browsers and standardized as part of the web platform, enabling safe, script-free parsing of markup strings.