JSFiddle - React, Tailwind, and code Playground

JavaScript

var myArray = ["Banana", "Orange", "Apple", "Mango"];

if ("Banana" in myArray) {
  console.log("yes")
} else {
  console.log("no") // <--
}

if (typeof myArray["Banana"] === 'undefined') {
  console.log("no") // <--
} else {
  console.log("yes")
}