Conditionally include attribute in XML literal Conditionally include attribute in XML literal xml xml

Conditionally include attribute in XML literal


xml scala lift

Option also works, which reduces unnecessary use of null:

scala> val checked:Option[xml.Text] = Nonechecked: Option[scala.xml.Text] = Nonescala> val xml = <input checked={checked} />xml: scala.xml.Elem = <input ></input>

xml scala lift

If you want to add the attribute only when checked, you can add it after using Scala XML API:

import scala.xml._val snippet = {  val x = <input type='radio'                 name={funcName}                 value='true' />  if( cond ) {    x % new UnprefixedAttribute("checked","checked",Null)  } else x}

xml scala lift

Believe it or not, you can do it like this:

<input type='radio'       name={funcName}       value='true'       checked={ if (cond) "checked" else null } />

This is one of the dark parts of Scala where null actually gets used.

Just to make clear, it does exactly what you want: if cond is false, then input will have no checked attribute.

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