main.js

window.boot = function() {
    var settings = window._CCSettings;
    window._CCSettings = undefined;
    var onStart = function onStart() {
        cc.view.enableRetina(true);
        cc.view.resizeWithBrowserSize(true);
        var launchScene = settings.launchScene;
        // load scene
                cc.director.loadScene(launchScene, null, function() {
            console.log("Success to load scene: " + launchScene);
        });
    };
    var isSubContext = cc.sys.platform === cc.sys.WECHAT_GAME_SUB;
    var option = {
        id: "GameCanvas",
        debugMode: settings.debug ? cc.debug.DebugMode.INFO : cc.debug.DebugMode.ERROR,
        showFPS: !isSubContext && settings.debug,
        frameRate: 60,
        groupList: settings.groupList,
        collisionMatrix: settings.collisionMatrix
    };
    cc.assetManager.init({
        bundleVers: settings.bundleVers,
        subpackages: settings.subpackages,
        remoteBundles: settings.remoteBundles,
        server: settings.server,
        subContextRoot: settings.subContextRoot
    });
    var RESOURCES = cc.AssetManager.BuiltinBundleName.RESOURCES;
    var INTERNAL = cc.AssetManager.BuiltinBundleName.INTERNAL;
    var MAIN = cc.AssetManager.BuiltinBundleName.MAIN;
    var START_SCENE = cc.AssetManager.BuiltinBundleName.START_SCENE;
    var bundleRoot = [ INTERNAL ];
    settings.hasResourcesBundle && bundleRoot.push(RESOURCES);
    settings.hasStartSceneBundle && bundleRoot.push(MAIN);
    var count = 0;
    function cb(err) {
        if (err) return console.error(err.message, err.stack);
        count++;
        if (count === bundleRoot.length + 1) {
            // if there is start-scene bundle. should load start-scene bundle in the last stage
            // Otherwise the main bundle should be the last
            cc.assetManager.loadBundle(settings.hasStartSceneBundle ? START_SCENE : MAIN, function(err) {
                if (!err) cc.game.run(option, onStart);
            });
        }
    }
    // load plugins
        cc.assetManager.loadScript(settings.jsList.map(function(x) {
        return "src/" + x;
    }), cb);
    // load bundles
        for (var i = 0; i < bundleRoot.length; i++) {
        cc.assetManager.loadBundle(bundleRoot[i], cb);
    }
};