Hi,

Following code cause an error, because NodeList doesn't extend
ISeqable.

(doseq [u (goog.dom/getElementsByClass "myclass")]
  ...)

Uncaught Error: No protocol method ISeqable.-seq defined for type
object: [object NodeList]

So I implemented ISeqable for NodeList.

(extend-type js/NodeList
  ISeqable
  (-seq [array] (array-seq array 0)))

I used an implementation of ISeqable for array as reference.
https://github.com/clojure/clojurescript/blob/master/src/cljs/cljs/core.cljs#L338

This works well on Chrome, Safari and Firefox, and doesn't on Opera.
Is special consideration needed for Opera?

Thanks.

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