google-sign-in-button.js

function button(parent_id, params = {}) {

  const container = document.getElementById(parent_id);

  const options = {
    type:  'standard',
    theme: 'outline',
    size:  'medium',
    shape: 'pill',
    ...params,
  };

  google.accounts.id.renderButton(
    container,
    options
  );   
}