JSFiddle - React, Tailwind, and code Playground

JavaScript

function findSecretMessage(paragraph) {
  arr = paragraph.split(' ');
  ms='';

  for (i=0; i<arr.length; i++){
    arr[i] = arr[i].toLowerCase();
    if(arr[i].match(/\./) != null){
      arr[i] = arr[i].slice(0, -1);
    }
  }

  alert('yes');
}
var paragraph = 'This is a test. this test is fun.';
findSecretMessage(paragraph);