systax error and mixins config do not work

This issue is a:

• Bug
• Feature suggestion
• Documentation issue
• Other (Please Specify)

Description

The common bundle and a page-special bundle are in front of requirejs-config.js after building. For this situation, there are many systax errors on checkout page, and mixins config of requirejs do not work.

Possible solutions:

Requirejs configuration should be loaded and executed before other modules with AMD by reference to Requirejs API and Require Optimizer. Besides, our code depend on polyfill.js and requirejs-mixins.js and so on. So, a page-special bundle should be placed at the end of head tag.

I modified the function _prepareLayout() in Magento_BundleConfig/Block/Html/Head/Config.php. It works.

if (file_exists($pageSpecificBundleAbsPath)) {
            $assetCollection->add(
                $pageSpecificBundleRelPath,
                $bundleConfig
            );
        }

Start in Magento_BundleConfig/Block/Html/Head/Config.php at _prepareLayout(), then inspect how RequireJS configuration and page-specific bundles are ordered in the head. Done means the configuration runs before AMD modules, the page-specific bundle is placed at the end of the head, and checkout has no syntax errors while RequireJS mixins work.