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Next Oct 27 Previous

Elementary node stuff

Which of the following functions will create DOMElement objects. Choose all that apply.

A: createComment()
B: createElement()
C: createElementNS()
D: createTextNode()


All four functions return an object of type DOMNode but only B: createElement() and C: createElementNS() return DOMElements. Take a good look at this (incomplete) DOMNode inheritance tree, it should be second nature to you:

  • DOMNode
    • DOMAttr
    • DOMCharacterData
      • DOMComment
      • DOMText
        • DOMCDATASection
    • DOMDocument
    • DOMDocumentFragment
    • DOMDocumentType
    • DOMElement
    • DOMEntity
    • DOMEntityReference