javascript typeof array

Array.isArray(variableName)

Array.isArray(object);

Array.isArray([1, 2, 3]);  // true
Array.isArray({foo: 123}); // false
Array.isArray('foobar');   // false
Array.isArray(undefined);  // false

var data = ['a', 'b', 'c']
var isArray = Array.isArray(data)
console.log(isArray)

Array.isArray(yourItem)

Array.isArray(arr)

//The method Array.isArray(A) checks if A is an array

Array.isArray([1, 2, 3]);  // true
Array.isArray('foobar');   // false for strings
Array.isArray({foo: 123}); // false for objects

Array.isArray(obj)

var array = [1, 3],
    prizes = [[1, 3], [1, 4]],
    includes = prizes.some(a => array.every((v, i) => v === a[i]));

console.log(includes);

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

var n = fruits.includes("Mango");