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HTML | DOM isDefaultNamespace() Method

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  • Last Updated : 25 Jul, 2019

The DOM isDefaultNamespace() method is used to return boolean true if the specified namespace is default otherwise, it returns boolean false. The URI of the namespace required can be checked using the namespaceURI string.



Return Value: It returns a boolean value true if the namespace is default, otherwise it returns false.

Example: Return DefaultNamespace property.

<!DOCTYPE html>
        HTML | DOM isDefaultNamespace() Method
        <button onclick="space()">
      Clicking on the 'Press' button will display
      if the specified namespace is default.
    <p id="demo"></p>
        function space() {
            // Access and return default namespace property.
            var d =
            var x =
            document.getElementById("demo").innerHTML =


Before clicking on the button:

After clicking on the button:

Note: Internet Explorer8 and earlier versions don’t support this method.

Browser Support: The browsers supported by DOM isDefaultNamespace() method are listed below:

  • Google Chrome
  • Internet Explorer 9.0
  • Firefox
  • Opera
  • Safari

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