javascript console -infinity, what does it mean?

Question

I´m learning javascript ES6 and I just spotted with -infinity on my console when I run this code:

let numeros = [1, 5, 10, 20, 100, 234];
let max = Math.max.apply(numeros);
console.log(max);

What does it mean?

Regards

Answer 1

The first argument of Function#apply is thisArg and you are just passing the thisArg as the array that means it's calling Math#max without any argument.

As per MDN docs :

If no arguments are given, the result is -Infinity.

In order to fix your problem set Math or null as thisArg.

let max= Math.max.apply(Math, numeros );

let numeros= [1,5,10,20,100,234];
    let max= Math.max.apply(Math, numeros );
    
    console.log( max );

---

As @FelixKling suggested, ES6 onwards you can use spread syntax to supply arguments.

Math.max(...numeros)

let numeros = [1, 5, 10, 20, 100, 234];
let max = Math.max(...numeros);

console.log(max);

Answer 2

Use an ES6 Spread instead:

let numeros = [1, 5, 10, 20, 100, 234];
let max = Math.max(...numeros);
console.log(max);

---

As @Pranav C Balan already mentioned, -Infinity is what Math.max() is supposed to return (defined by spec) if no arguments are given:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/max#Description