03_ugly_form_buttons.js

function materializeButtons() {
    document.querySelectorAll('button').forEach(function(control) {
        control.classList.add('mdl-button', 'mdl-js-button', 'mdl-button--raised', 'mdl-js-ripple-effect', 'mdl-button--colored');
    });
}

function materializeControls() {
    materializeTextInputs();
    materializeSelects();
    materializeRadioButtons();
    materializeCheckboxes();
    materializeTables();
    materializeLists();
    materializeButtons();
}