Add test code

examples/loader/load-complete-promise.bat

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+@echo off
+set main=./examples/loader/load-complete-promise.js
+cd ..
+cd ..
+npm run dev

examples/loader/load-complete-promise.js

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+import phaser from 'phaser/src/phaser.js';
+import LoadCompletePromise from '../../plugins/utils/loader/LoadCompletePromise';
+
+class Demo extends Phaser.Scene {
+    constructor() {
+        super({
+            key: 'examples'
+        })
+    }
+
+    preload() {
+        LoadCompletePromise(this, {
+            type: 'image',
+            key: 'classroom',
+            url: 'assets/images/backgrounds/classroom.png'
+        })
+            .then(function (result) {
+                console.log(result)
+            })
+    }
+
+    create() {
+        this.add.image(400, 300, 'classroom');
+    }
+
+    update() { }
+}
+
+var config = {
+    type: Phaser.AUTO,
+    parent: 'phaser-example',
+    width: 800,
+    height: 600,
+    scale: {
+        mode: Phaser.Scale.FIT,
+        autoCenter: Phaser.Scale.CENTER_BOTH,
+    },
+    scene: Demo
+};
+
+var game = new Phaser.Game(config);

plugins/utils/loader/LoadCompletePromise.js

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+var LoadCompletePromise = function (scene, config) {
+    return new Promise(function (resolve, reject) {
+        var type = config.type;
+        delete config.type;
+        var key = config.key;
+        scene
+            .load[type](config)
+            .on(`filecomplete-${type}-${key}`, function (key, type, data) {
+                resolve({
+                    key: key,
+                    type: type,
+                    data: data,
+                });
+            })
+            .start()
+    });
+};
+
+export default LoadCompletePromise;