Javascript Override Plugin?

One way to find a plugin for this would be to search the plugins directory using ‘JavaScript’ as the keyword: https://www.ads-software.com/plugins/search.php?q=JavaScript – This returns a lot of plugins, but the description of each will help you decide what is possibly appropriate to your requirements.

This one looks like it may do what you want
https://www.ads-software.com/plugins/insert-javascript-css/

Depending on your specific needs, it may be preferable to make a simple shortcode plugin to include the js as Jan suggests in this topic: https://www.ads-software.com/support/topic/how-to-allow-javascript-in-posts-or-widget-areas