Portal Entity Form - Custom Javascript size exceeded

Custom JavaScript exceeded the maximum number of 1 Lakh characters in Portal Entity Form. 

I found the below two as solutions to overcome this, but I need a suggestion to follow the best approach. 

1. Increase the maximum length of the field ‘Custom JavaScript’ in the entity ‘Entity Form’

(Note: I tried increasing the maximum length in trail instance and it is working fine as expected. As it is a trail instance, unable to do impact analysis).        Reference URL : http://sharathdozen.blogspot.com/2017/11/increasing-maximum-character-limit-for.html

2.  Adding Custom Scripts in the associated web page of the entity form.

Please suggest.

Thanks & Regards,

Nandhini M