How to call a function (requiring args) with string name - Clojurescript | d3

Question

I'm trying to do some refactoring on a function (set-attr) that calls a function (.attr) on a d3 object (node). I want to be able to decouple the object function (.attr) from set-attr.

But I keep getting this error Cannot read property 'each' of null.

I'm hoping someone has experience with d3 interop in Cljs and knows of something that can work, because it works fine on regular js objects.

Function that works

(defn set-attr [node [attr settr]]
  (.attr node attr settr))

What I think should work (but gives me the error)

(defn set-attr [node [attr settr]]
  ((aget node "attr") attr settr))

Works fine on a regular js object

((aget (clj->js {:foo (fn [x y] (str "hi" x y))}) "foo" ) "ryan" "lol")
;; => "hiryanlol"

akond · Accepted Answer · 2018-02-14 06:12:44Z

1

d3 uses inheritance. Thus you cannot process this object as a mere hash-table. You have to reach to its prototype to get what you want, which is usually not a good idea: this would produce rather brittle code.

answered Feb 14, 2018 at 6:12

akond

16.1k4 gold badges37 silver badges58 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to call a function (requiring args) with string name - Clojurescript | d3

Function that works

What I think should work (but gives me the error)

Works fine on a regular js object

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

Function that works

What I think should work (but gives me the error)

Works fine on a regular js object

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related