if (document.readyState && document.readyState !== 'loading') {
  kagiSummarizeOnLoad();
} else {
  document.addEventListener('DOMContentLoaded', kagiSummarizeOnLoad, false);
}

function kagiSummarizeOnLoad() {
  console.log('configuring kagi observer');
  var observer = new MutationObserver(function(mutations) {
    console.log('kagi observer triggered');
    mutations.forEach(function(mutation) {
      if (mutation.addedNodes && mutation.addedNodes.length > 0) {
        console.log(mutation.addedNodes);
        var hasClass = [].some.call(mutation.addedNodes, function(el) {
          return el.classList.contains('kagi-summary');
        });
        if (hasClass) {
          console.log('observer found kagi class');
        }
      }
    });
  });

  observer.observe(document.body, {
    attributes: true,
    childList: true,
    characterData: true
  });
}