How to write something after select tag option?

Question

Means if we choose specific option then write something after it

Answer 1

https://code.sololearn.com/WT8wFn67dAwV/?ref=app

Learn selectedIndex method https://developer.mozilla.org/en-US/docs/Web/API/HTMLSelectElement/selectedIndex

Answer 2

Abhishek Kumar Would you please add your code too?