function decorateElement(element) {
  const hasMissingTabIndex = Boolean(!element.getAttribute('tabindex') && element.tabIndex === -1);

  if (hasMissingTabIndex) {
    elementsWithMissingTabIndex.push(element);
    element.tabIndex = 0;
  }
}
function decorateElement(element) {
  const hasMissingTabIndex = Boolean(!element.getAttribute('tabindex') && element.tabIndex === -1);

  if (hasMissingTabIndex) {
    elementsWithMissingTabIndex.push(element);
    element.tabIndex = 0;
  }
}
function decorateElement ( element ) { const hasMissingTabIndex = Boolean ( ! element . getAttribute ( 'tabindex' ) && element . tabIndex === - 1 ) ; if ( hasMissingTabIndex ) { elementsWithMissingTabIndex . push ( element ) ; element . tabIndex = 0 ; } }
Decorates element with tabindex attributes
@param {HTMLElement} element
@return {Object}
@private
Decorates element with tabindex attributes
Decorates an element with a tabindex attribute.