ClojureScript 互操作

Question

我试图找出如何访问 ClojureScript 中的 Javascript 对象属性。如果我事先知道属性(property)的名称，那就很容易了。获取foo.bar我只是做

(.-bar foo)

Is there a way to access a property whose name is known only at runtime? I am looking for the equivalent of the JS syntax foo[dynamicBar]

Answer 1

您可以使用 aget/aset 访问仅在运行时已知的属性。

;; Use clj->js to convert clj(s) map to javascript.
;; Note the #js {:bar 100} reader literal indicating a js map.

cljs.user> (def foo (clj->js {:bar 100}))
#js {:bar 100}
cljs.user> (.-bar foo) 
100
cljs.user> (aget foo "bar")
100
cljs.user> (aset foo "baz" 200)
200
cljs.user> (.-baz foo) 
200