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    Returns a DOMImplementation object associated with the current document.


    DOMImpObj = document.implementation;


    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


    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.


    Gecko-specific notes

    • Starting with Gecko 19.0 (Firefox 19.0 / Thunderbird 19.0 / SeaMonkey 2.16) the hasFeature method will always return true.

    Document Tags and Contributors

    Last updated by: teoli,
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