Health watcher

index.js

// Grab the current pid
$.get('/health', function (health) {
  var pid = health.pid;

  // Watch the health to see if it changes
  setInterval(function () {
    // If it does, refresh the page
    $.get('/health', function (health) {
      if (health.pid !== pid) {
        location.reload();
      }
    });
  }, 1e3);
});

// Re-grab the CSS now too
$('link[rel="stylesheet"]').each(function () {
  var stylesheet = this,
      href = stylesheet.href;
  $.get(href, function (origCSS) {
    // Watch the health to see if it changes
    setInterval(function () {
      // If it does, reload the CSS
      $.get(href, function (css) {
        if (origCSS !== css) {
          var href = stylesheet.href;
          stylesheet.href += href.indexOf('?') > -1 ? '1' : '?1';
          origCSS = css;
        }
      });
    }, 1e3);
  });
});