Return this document's DOMimplementation object:
var imp = document.implementation;
Click the button to check if this document has the feature HTML DOM 1.0.
<!DOCTYPE html> <html> <body> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {// ww w .jav a2 s .c om var imp = document.implementation; document.getElementById("demo").innerHTML = imp.hasFeature("HTML", "1.0"); } </script> </body> </html>
The implementation property returns the DOMimplementation object that handles this document, as a DocumentImplementation object.