DOM:element.hasAttributeNS

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« Gecko DOM Reference

Contents 1 Summary 2 Syntax 3 Example 4 Notes 5 Specification

[edit] Summary

hasAttributeNS returns a boolean value indicating whether the current element has the specified attribute.

[edit] Syntax

result = element.hasAttributeNS(namespace, localName) 

• result is the boolean value true or false.
• namespace is a string specifying the namespace of the attribute.
• localName is the name of the attribute.

[edit] Example

// check that the attribute exists 
// before you set a value 
var d = document.getElementById("div1"); 
if (d.hasAttributeNS( 
        "http://www.mozilla.org/ns/specialspace/", 
        "special-align")) {
   d.setAttribute("align", "center");
}

[edit] Notes

DOM methods dealing with element's attributes:

Not namespace-aware, most commonly used methods	Namespace-aware variants (DOM Level 2)	DOM Level 1 methods for dealing with Attr nodes directly (seldom used)	DOM Level 2 namespace-aware methods for dealing with Attr nodes directly (seldom used)
setAttribute (DOM 1)	setAttributeNS	setAttributeNode	setAttributeNodeNS
getAttribute (DOM 1)	getAttributeNS	getAttributeNode	getAttributeNodeNS
hasAttribute (DOM 2)	hasAttributeNS	-	-
removeAttribute (DOM 1)	removeAttributeNS	removeAttributeNode	-

[edit] Specification

DOM Level 2 Core: hasAttributeNS