How to work with javascript on a working site (bitrix)?

Question

JavaScript

A site on bitrix that actively uses javascript (and custom elements) in component output templates.
for example, in one of the templates (there are many) the line:

<mainslider v-model="formData" class="section" :data="<?=$arResult['json']?>"></mainslider>

and all javascript code is packed into a single .js file
how to parse this mess? apparently the development was carried out in vue or angular, after which the scripts were packed into one .js file and abandoned on the site, which already in the output templates the component refers to this file.
Can I somehow parse this file to a form acceptable for understanding?