![]() ![]() DOM attributes, in this case, are the nodes in question. "Live" means that when the node changes in the DOM, they change on the JavaScript side, and vice versa. HTMLElement.attributes is a live NamedNodeMap Object that relates to the elements in the DOM. Now, there some special properties that are mapped to attributes, and at the time or writing there are only 4 that are guaranteed (more on that later).Īll HTMLElements include a property called attributes. Sure, you can create a property called nearly anything you want inside HTMLElement, but it doesn't have to do anything with the DOM (what's on the page). Also, depending on the Javascript prototype, sometimes you can use a an element's property to access an attributes and sometimes you can't.įirst, you have to remember that an HTMLElement is a Javascript object. These answers aren't really addressing the large confusion with between properties and attributes. It's not even close to complete, but it demonstrates the overall structure. This "chart" captures a portion of the prototype chain for these DOM objects. Although most properties will use lowercase, some are camelCase. Notice that JavaScript properties are case sensitive. It only available on HTMLInputElement and it's descendants. ![]() So, the specific properties that are defined will depend on the type of Element you are accessing.įor example, className and id are defined on Element and exist on all DOM nodes that are elements, but not text or comment nodes. The available properties are defined somewhere in the prototype chain of DOM object in question. ![]() Which properties exist on a given object depends on the object's DOM node type, regardless of which attributes are specified in the HTML. Many attributes can be accessed using convenient properties on the DOM object. Properties on the DOM object, such as element.id Example Usage:ĭocument.write('Name: class Value: ' + div.getAttribute('class') + '') ĭocument.write('Name: ID Value: ' + div.getAttribute('ID') + '') ĭocument.write('Name: DATA-TEST Value: ' + div.getAttribute('DATA-TEST') + '') ĭocument.write('Name: nonStandard Value: ' + div.getAttribute('nonStandard') + '') ĭocument.write('Name: customTest Value: ' + div.getAttribute('customTest') + '') 3. These methods exist directly on the Element without needing to access attributes and its methods but perform the same functions.Īgain, notice that string name are case insensitive. Var customAttr = document.createAttribute('customTest') ĬustomAttr = ('customTest') ĭocument.write('attributes.getNamedItem() Name: ' + customAttr.name + ' Value: ' + customAttr.value + '') 2. you can enumerate all defined attributes Var classAttr = ('CLASS') ĭocument.write('attributes.getNamedItem() Name: ' + classAttr.name + ' Value: ' + classAttr.value + '') The value will be in the BinaryData column, in HEX representation (so 'daf' will show up as 0圆46166).Var div = document.getElementsByTagName('div') I modified the code to show how to cast it before the exec. The exec call doe snot allow for a CAST to be inlined in the parameter list. The call is not critically expensive (specially if there is no monitoring listening for it), but it should be removed none-the-less. I would also comment out the call to sp_trace_generateevent in production once the debugging is done. For debugging purposes you can trace them explicitly into the Profiler using a custom event, via sp_trace_generateevent: declare varbinary(8000) Įxec sp_trace_generateevent need to modify your Profiler session to monitor for the user User-Configurable Event Class, otherwise you won't see the generated events. ![]()
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