privacy-policy.js

(function() {
    'use strict';

    function createElement(tagName, attributes) {
        return Object.assign(document.createElement(tagName), attributes);
    }

    var privacyPolicyContainer = createElement('div', {className: 'form-control'});
    privacyPolicyContainer.appendChild(createElement('input', {name: 'privacy-policy', type: 'checkbox', checked: true, required: true}));
    privacyPolicyContainer.appendChild(createElement('label', {htmlFor: 'privacy-policy', innerHTML: 'Согласен на обработку моих персональных данных'}));

    var excludeForms = [];

    document.addEventListener('DOMContentLoaded', function() {
        Array.prototype.forEach.call(document.forms, function(form) {
            if (!excludeForms.includes(form.name)) {
                form.insertBefore(privacyPolicyContainer, form.elements.lastChild);
            }
        });
    });
})();