appwrite/public/scripts/views/forms/switch.js

(function (window) {
    "use strict";

    window.ls.container.get('view').add(
        {
            selector: 'data-forms-switch',
            repeat: false,
            controller: function(element) {
                let input = window.document.createElement('input');
                input.type = 'checkbox';
                input.className = 'switch';

                let syncA = function () {
                    element.value = (input.checked) ? 'on' : 'off';
                };

                let syncB = function () {
                    input.checked = (element.value === 'on');
                };

                input.addEventListener('input', syncA);
                input.addEventListener('change', syncA);

                element.addEventListener('input', syncB);
                element.addEventListener('change', syncB);

                syncA();

                element.parentNode.insertBefore(input, element);
            }
        }
    );

})(window);