Helpful methods for HTMLCollection

[japgolly]

Would you be interested in adding these useful functions the library?
They make element.children act a bit more Scala-idiomatically.

@inline implicit class PatchHTMLCollection(private val c: raw.HTMLCollection) extends AnyVal {
  def nonEmpty: Boolean =
    c.length > 0

  def isEmpty: Boolean =
    !nonEmpty

  def headOption: Option[Element] =
    if (nonEmpty) Some(head) else None

  def lastOption: Option[Element] =
    if (nonEmpty) Some(last) else None

  def head: Element =
    c(0)

  def last: Element =
    c(c.length - 1)

  def iterator: Iterator[Element] =
    (0 until c.length).iterator.map(c.apply)

  def deepIteratorDepthFirst: Iterator[Element] =
    iterator.flatMap(e => Iterator.single(e) ++ e.children.deepIteratorDepthFirst)

  def deepIteratorBreadthFirst: Iterator[Element] =
    iterator ++ iterator.flatMap(_.children.deepIteratorBreadthFirst)
}

If interested, please tell me where you'd like me to put them and how.

[lihaoyi]

Would another option be to instead of adding a bunch of individual extension methods, have an implicit conversion into a Seq[T]?

[sjrd]

I agree with @lihaoyi. That's what we did for js.Array.

[japgolly]

Ah, no worries.

[bbarker]

Where does said implicit conversion exist (or does it)? Or was the suggestion that we should use our own implicit conversion in each project that needs it?

[mseddon]

@bbarker the implicits should be imported into scope from org.scalajs.dom.ext.

[dportabella]

Example on how to use it:

import org.scalajs.dom.ext._
document.body.children.map(_.textContent)