document.implementation

摘要

Returns a DOMImplementation object associated with the current document.

语法

DOMImpObj = document.DOMImplementation

示例

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

注释

If available, DOMImplementation is a special object that provides 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.

参考

DOM Level 2 HTML: implementation