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lanejd
lanejd
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JS -- XML Question - Can I add attributes using Javascript?

Jul 30, 2012 2:26 PM

Tags: #javascript #xml #attributes

I want to add an attribute to an element tag, but I don't see how to do it programmatically. Is it possible? Also, is there a way to name an element tag dynamically? For example:

 

The way to add a child element is to either use the appendChild method like this:

 

XMLObject.appendChild(<childElement/>);
XMLObject.childElement= "something";

 

or just add it like this:

 

XMLObject.childElement = "something";

 

Right? (Side Question: Is there a difference between these two methods?).

 

What I want to do is to either add a dynamic attribute to a statically named child, or to create a dynamically named child.

 

I haven't been able to figure this out myself. Any ideas?

606 Views   4 Replies   Latest reply: lanejd, Jul 31, 2012 8:45 AM
 
Replies
  • lanejd
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    1. lanejd,
    Jul 30, 2012 4:17 PM   in reply to lanejd
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    I think I'm on to something. Using eval(), I can add a dynamically named child, I think. It's working so far. Hope this is helpful for someone else.

     

    XMLObject = new XML(<xml/>);
eval("XMLObject.appendChild(<" + nameReference + ">/);");

     

    Now, I'll make this a function so I don't have to keep writing it over and over again. I imagine I can reference the node in a similar way . . . I hope.

     
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  • absqua
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    2. absqua,
    Jul 30, 2012 5:09 PM   in reply to lanejd
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    Maybe have a look at Mozilla's E4X tutorial: https://developer.mozilla.org/en/E4X_Tutorial/

     

    There's no need for eval() here. (There usually isn't.) Use:

     

    XMLObject.appendChild(<{nameReference}/>);

     

    To add an attribute, you can just use:

     

    XMLObject.@new_att = "the value";

     

    Jeff

     
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  • Dirk Becker
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    3. Dirk Becker,
    Jul 30, 2012 11:03 PM   in reply to absqua
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    XMLObject["@new_att"] = "the value";

     

    With a slight variation the attribute name can also be specified as string, see above.

    To remove the attribute, delete it.

    delete XMLObject["@new_att"];


    Dirk

     
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  • lanejd
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    4. lanejd,
    Jul 31, 2012 8:45 AM   in reply to Dirk Becker
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    Thank you! This is exactly what I needed. I have been scouring the web looking for something like this.

     

    I'm still quite the n00b, so thanks for the help.

     
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