Push Multiple Elements to Array

It looks like you’re trying to use `apply` in JavaScript to push multiple elements into an array, but the way you’re using it is causing an error. In JavaScript, `apply` is a method that allows you to call a function with a specified `this` value and arguments provided as an array (or array-like object).

To correctly use `apply` with `Array.prototype.push`, you need to call `push` on an actual array instead of `null`. Here’s how you can do it:

let a = [];
Array.prototype.push.apply(a, [1, 2]);
console.log(a); // [1, 2]

Alternatively, you can use the spread operator, which is often simpler and more modern:

let a = [];
a.push(...[1, 2]);
console.log(a); // [1, 2]