Node.lookupPrefix() - Web APIs 编辑

The Node.lookupPrefix() method returns a DOMString containing the prefix for a given namespace URI, if present, and null if not. When multiple prefixes are possible, the result is implementation-dependent.

Due to bug 312019, this method does not work with dynamically assigned namespaces, that is, those set with the Node.prefix property.

Browser compatibility

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See also

• http://www.w3.org/TR/DOM-Level-3-Cor...amespacePrefix