Different ways of checking if an item from an array exists within a string

findStringFromArray.js

// Iterates over an array and returns true if any are found
function itemInStr(str, arr) {
  return arr.some(item => str.includes(item));
}

// uses Regex to test if a string is in the array, returns true if found
function testItemInStr(str,arr){
  let regex = new RegExp(arr.join("|"), "i"); 
  return regex.test(str);
}

// Check if array contains the string (case insensitive)
function arrayContainsStr(str, arr) {
  return arr.some(item => item.toLowerCase() === target.toLowerCase());
}

const array = ['item1', 'item2', 'item3'];
const longStr = "This is a string containing item2";
const shortStr = "item2";

// native (ES6) way to check if string is in Array (exact match)
array.includes(shortStr);