highlight all elements with certain css property with jquery

highlight-css.js

function css( element, property ) {
    return window.getComputedStyle( element, null ).getPropertyValue( property ) || '';
}

$('*').each(function(i, el) {
  if (~css(el, 'font-family').indexOf('Arial')) {
    $(el).css('outline', '1px solid red');
  }
});