JSFiddle - React, Tailwind, and code Playground
JavaScript
var arr1 = [3, 15];
var arr2 = ["apple", "orange", "banana"];
var arr3 = arr1.concat(arr2);
alert(arr3); // 3,15,apple,orange,banana
var arr1 = [3, 15];
var arr2 = ["apple", "orange", "banana"];
var arr3 = arr1.concat(arr2);
alert(arr3); // 3,15,apple,orange,banana