How to use bundled JS script from webpack to Web Sites

I have created an app in ReactJS and I have bundled it using Webpack. It works very good on Flask, but when I import HTML/CSS/JS files it is giving me an error on bundle.js file. Where the React code is bundled.

The error states

jinja2.exceptions.TemplateSyntaxError: unexpected char ‘\’ at 2500833

I understand that it tried to render using Jinja. My question is, how to disable this on specific files?