Webpack - The ID of each module in production build

When I try to read a Webpack production build, I see something like this

(() => {
    var e = {
            8: e => {
                function t(n) {
                    return "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? (e.exports = t = function(e) {
                        return typeof e
                    }, e.exports.default = e.exports, e.exports.__esModule = !0) : (e.exports = t = function(e) {
                        return e && "function" == typeof Symbol && e.constructor === Symbol && e !== Symbol.prototype ? "symbol" : typeof e
                    }, e.exports.default = e.exports, e.exports.__esModule = !0), t(n)
                }
                e.exports = t, e.exports.default = e.exports, e.exports.__esModule = !0
            },
            576: (e, t, n) => {
                var r = e.exports = {
                    content: {

Do you know what is the number 8 and 576? Where they come from and how to get that number using hook?

Thank you so much