jellyfin-web/src/controllers/wizard/finish.js

define(['loading'], function (loading) {
    'use strict';

    function onFinish() {
        loading.show();
        ApiClient.ajax({
            url: ApiClient.getUrl('Startup/Complete'),
            type: 'POST'
        }).then(function () {
            loading.hide();
            window.location.href = 'index.html';
        });
    }

    return function (view, params) {
        view.querySelector('.btnWizardNext').addEventListener('click', onFinish);
    };
});