The Document.implementation
property returns a DOMImplementation
object associated with the current document.
Syntax
DOMImpObj = document.implementation;
Example
var modName = "HTML"; var modVer = "2.0"; var conformTest = document.implementation.hasFeature( modName, modVer ); alert( "DOM " + modName + " " + modVer + " supported?: " + conformTest ); // alerts with: "DOM HTML 2.0 supported?: true" if DOM Level 2 HTML module is supported.
A list of module names (e.g., Core, HTML, XML, etc.) is available in the DOM Level 2 Conformance Section.
Notes
The W3C's DOM Level 1 Recommendation only specified the hasFeature
method, which is one way to determine if a DOM module is supported by a browser (see example above and What does your user agent claim to support?). If available, other DOMImplementation
methods provide services for controlling things outside of a single document. For example, the DOMImplementation
interface includes a createDocumentType
method with which DTDs can be created for one or more documents managed by the implementation.
Specification
Browser compatibility
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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
implementation | Chrome Full support 1 | Edge Full support 12 | Firefox Full support Yes | IE ? | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
Gecko-specific notes
- Starting with Gecko 19.0 (Firefox 19.0 / Thunderbird 19.0 / SeaMonkey 2.16) the
hasFeature
method will always return true.