Chaining array and string methods in javascript

Question

I try to chain some array and string methods but it doesn't work. It'd be great if anyone could explain to me why a function such as this doesn't work:

const scream = text => text.split('').push('!').join('').toUpperCase()

Answer 1

You could use Array#concat to return an array with another value instead of Array#push, which returns the new length, but is not part of a fluent interface for a later joining (which needs an array).

const scream = text => text.split('').concat('!').join('').toUpperCase();

console.log(scream('hi'));