Compare two arrays - JavaScript

// a and b are arrays
const isEqual = (a, b) => JSON.stringify(a) === JSON.stringify(b);

// Or
const isEqual = (a, b) => a.length === b.length && a.every((v, i) => v === b[i]);

// Examples
isEqual([1, 2, 3], [1, 2, 3]); // true
isEqual([1, 2, 3], [1, '2', 3]); // false

Comments

[bugb]

Try this:

For 1st:

isEqual([()=>{}],[()=>{2}])
isEqual([NaN],[null])
//....
// expect false but true

For 2nd:

isEqual([NaN],[NaN])

// what is your expectation?