ClojureScript 自引用

Question

我正在尝试将一些简单的示例从 JavaScript 转换为 ClojureScript 以熟悉 ClojureScript，但我无法理解这个 snippet：

var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'example', { create: create });

function create() {
    var text = "- phaser -\n with a sprinkle of \n pixi dust.";
    var style = { font: "65px Arial", fill: "#ff0044", align: "center" };

    var t = game.add.text(game.world.centerX-300, 0, text, style);
}

至：

;; Uncaught ReferenceError: game is not defined
(defn create []
  (let [text "- phaser -\n with a sprinkle of \n pixi dust."
        style (js-obj "font" "65px Arial" "fill" "#ff0044" "align" "center")]
    (game.add.text (- game.world.centerX 300) 0 text style)))

(def game (js/Phaser.Game. 800 600 js/Phaser.CANVAS "example" #js {:create create}))

问题是我也在尝试从 ClojureScript 中的函数中自我引用待定义的对象 - 我觉得这不对and/or ClojureScript，那么如何处理这种情况？

编辑：

;; Working example
(declare game)

(defn create []
  (let [text "- phaser -\n with a sprinkle of \n pixi dust."
        style (js-obj "font" "65px Arial" "fill" "#ff0044" "align" "center")]
    (.text game.add (- (.-centerX game.world) 300) 0 text style)))

(def game (js/Phaser.Game. 800 600 js/Phaser.CANVAS "example"  #js {:create create}))

Answer 1

Clojure 不会在函数之后获取定义，所以它超出了范围。您可以将其放在范围内，将其移动到函数上方，或者 declare 将其放在文件顶部。

https://clojuredocs.org/clojure.core/declare

ClojureScript 自引用

ClojureScript self referencing

javascript

clojurescript

phaser-framework