var a=[1], b=1, c="1", d={1:1}
console.log(Array.isArray(a));
console.log(Array.isArray(b));
console.log(Array.isArray(c));
console.log(Array.isArray([d]));
console.log(Array.isArray([]));Ответ: true
false
false
true
true
JavaScript test | #JavaScript