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CLJS-495 #45

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3 changes: 3 additions & 0 deletions src/clj/cljs/core.clj
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Original file line number Diff line number Diff line change
Expand Up @@ -202,6 +202,9 @@
(defmacro false? [x]
(bool-expr (list 'js* "~{} === false" x)))

(defmacro exists? [x]
(bool-expr (list 'js* "typeof ~{} !== 'undefined'" x)))

(defmacro undefined? [x]
(bool-expr (list 'js* "(void 0 === ~{})" x)))

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4 changes: 4 additions & 0 deletions src/cljs/cljs/core.cljs
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Original file line number Diff line number Diff line change
Expand Up @@ -1004,6 +1004,10 @@ reduces them without incurring seq initialization"
"Returns true if x is the value true, false otherwise."
[x] (cljs.core/true? x))

(defn ^boolean exists?
"Return true if object exists, false otherwise."
[x] (not= "undefined" (goog/typeOf x)))

(defn ^boolean undefined? [x]
(cljs.core/undefined? x))

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2 changes: 1 addition & 1 deletion web/vendor/jq-console
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Submodule jq-console updated from 19e247 to 309fa6