Return the number of attributes of a button element:
The result could be:
The length property return the number of nodes in a collection.
A Node object's attributes is an example of a NamedNodeMap object
The length property is supported in all major browsers.
Note: In Internet Explorer 8 and earlier, the length property for attributes will return the number of all possible attributes for an element.
|Return Value:||A Number, representing the number of nodes in the nodemap|
|DOM Version||Core Level 1|
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