library-preload.js VS library-preload.json in OpenUI5
<p>I have a OpenUI5 application that uses a custom library with data-sap-ui-preload="async" enabled. In the latest OpenUi5 Version 1.40.8, the runtime looks first for a library-preload.js file, before loading the library-preload.json file as a fallback. </p>

<p>2016-11-02 17:53:39.471540 failed to load 'XXX/library-preload.js' (undefined), falling back to library-preload.json -  </p>

<p>But the openui5-grunt task openui5_preload 0.10.0 does not create a library-preload.js file, only a library-preload.json file.  </p>

<p>How can i create a library-preload.js file?</p>