XML DOM | DOMException Object

Hello folks! welcome back to a new edition of our tutorial on XML DOM. In this tutorial, we will be discussing about the XML DOM DOMException Object

XML DOM DOMException Object represents an unusual event occurring when a method or property is used.

XML DOM DOMException Object Properties

Following table below lists the properties of the XML DOM DOMException Object -

S.No.	Property & Description
1	name Returns a DOMString that contains one of the string associated with an error constant (as seen the table below).

READ: XML DOM | Attribute Object

Error Types

The following table below lists the various Error Types available -

S.No.	Type & Description
1	IndexSizeError The index is not in the allowed range. For example, this can be thrown by the Range object. (Legacy code value: 1 and legacy constant name: INDEX_SIZE_ERR)
2	HierarchyRequestError The node tree hierarchy is not correct. (Legacy code value: 3 and legacy constant name: HIERARCHY_REQUEST_ERR)
3	WrongDocumentError The object is in the wrong document. (Legacy code value: 4 and legacy constant name: WRONG_DOCUMENT_ERR)
4	InvalidCharacterError The string contains invalid characters. (Legacy code value: 5 and legacy constant name: INVALID_CHARACTER_ERR)
5	NoModificationAllowedError The object cannot be modified. (Legacy code value: 7 and legacy constant name: NO_MODIFICATION_ALLOWED_ERR)
6	NotFoundError The object cannot be found here. (Legacy code value: 8 and legacy constant name: NOT_FOUND_ERR)
7	NotSupportedError The operation is not supported. (Legacy code value: 9 and legacy constant name: NOT_SUPPORTED_ERR)
8	InvalidStateError The object is in an invalid state. (Legacy code value: 11 and legacy constant name: INVALID_STATE_ERR)
9	SyntaxError The string did not match the expected pattern. (Legacy code value: 12 and legacy constant name: SYNTAX_ERR)
10	InvalidModificationError The object cannot be modified in this way. (Legacy code value: 13 and legacy constant name: INVALID_MODIFICATION_ERR)
11	NamespaceError The operation is not allowed by Namespaces in XML. (Legacy code value: 14 and legacy constant name: NAMESPACE_ERR)
12	InvalidAccessError The object does not support the operation or argument. (Legacy code value: 15 and legacy constant name: INVALID_ACCESS_ERR)
13	TypeMismatchError The type of the object does not match the expected type. (Legacy code value: 17 and legacy constant name: TYPE_MISMATCH_ERR) This value is deprecated, the JavaScript TypeError exception is now raised instead of a DOMException with this value.
14	SecurityError The operation is insecure. (Legacy code value: 18 and legacy constant name: SECURITY_ERR)
15	NetworkError A network error occurred. (Legacy code value: 19 and legacy constant name: NETWORK_ERR)
16	AbortError The operation was aborted. (Legacy code value: 20 and legacy constant name: ABORT_ERR)
17	URLMismatchError The given URL does not match another URL. (Legacy code value: 21 and legacy constant name: URL_MISMATCH_ERR)
18	QuotaExceededError The quota has been exceeded. (Legacy code value: 22 and legacy constant name: QUOTA_EXCEEDED_ERR)
19	TimeoutError The operation timed out. (Legacy code value: 23 and legacy constant name: TIMEOUT_ERR)
20	InvalidNodeTypeError The node is incorrect or has an incorrect ancestor for this operation. (Legacy code value: 24 and legacy constant name: INVALID_NODE_TYPE_ERR)
21	DataCloneError The object cannot be cloned. (Legacy code value: 25 and legacy constant name: DATA_CLONE_ERR)
22	EncodingError The encoding operation, being an encoding or a decoding one, failed (No legacy code value and constant name).
23	NotReadableError The input/output read operation failed (No legacy code value and constant name).

Example

Following example below shows how using a not well-formed XML document causes a DOMException -

Following are the error.xml contents -

<?xml version = "1.0" encoding = "UTF-8" standalone = "no" ?>
<Company id = "companyid">
   <Employee category = "Technical" id = "firstelement" type = "text/html">
      <FirstName>Kennedy</first>
      <LastName>Nkpara</LastName>
      <ContactNo>1234567890</ContactNo>
      <Email>[email protected]</Email>
   </Employee>
</Company>

READ: XML DOM | XMLHttpRequest Object

The following example illustrates the usage of the name attribute -

<html>
   <head>
      <script>
         function loadXMLDoc(filename) {
            if (window.XMLHttpRequest) {
               xhttp = new XMLHttpRequest();
            } else // code for IE5 and IE6 {
               xhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            xhttp.open("GET",filename,false);
            xhttp.send();
            return xhttp.responseXML;
         }
      </script>
   </head>
   <body>
      <script>
         try {
            xmlDoc = loadXMLDoc("/dom/error.xml");
            var node  = xmlDoc.getElementsByTagName("to").item(0);
            var refnode = node.nextSibling;
            var newnode = xmlDoc.createTextNode('That is why you fail.');
            node.insertBefore(newnode, refnode);
         } catch(err) {
            document.write(err.name);
         }
      </script>
   </body>
</html>

Output

Save this file as domexception_name.html on the server's path (this file and error.xml should be on the same path in your server). This is going to give us the following output below -

TypeError

READ: XML DOM | Comment Object

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be starting our tutorial series on Bootstrap with an Introduction.

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