Word limit in Storyline

Hey everyone!

I am building a micro-learning regarding how to analyze a chart step by step. For this specific exercise, I want to include text entries for the learners to write down their thoughts for each step. I am not using the Essay or the Short answer that Storyline provides and I was wondering if there is a way (possible with JavaScript) that we can set a word limit for each text entry. I tried some JavaScripts that I could find online but nothing seems to work. 

I would really appreciate your input! Thank you:)