JSFiddle - React, Tailwind, and code Playground

by Serhii Tymchak

JavaScript

function find(array, value) {
	if (array.indexOf){
  return array.indexOf(value)+1;
  }
  for (var i = 0; i < array.length; i++ ) {
  if (array[i] === value) return i = i+1;
  }
  return -1;
}

var arr = ["a","b","c","d","e","f","j","g"];
var findWhat = prompt("We have array" + arr,"");
alert(find(arr,findWhat));