old_contents: (function() {
  
      "use strict";
  
      const app = {};
  
      app.colorModule = (() => {
  
          const generateColor = () => '#' + Math.random().toString(16).slice(2, 8);
  
          const updateColorVar = () => {
              console.log('some stuff');
              document.body.style.setProperty('--color-var', generateColor());
          };
  
          const init = () => updateColorVar();
  
          return {
              init: init
          };
  
      })();
  
      app.colorModule.init();
  
  })();
new_contents: (function() {
  
      "use strict";
  
      const app = {};
  
      app.colorModule = (() => {
  
          const generateColor = () => '#' + Math.random().toString(16).slice(2, 8);
          const updateColorVar = () => document.body.style.setProperty('--color-var', generateColor());
          const init = () => updateColorVar();
  
          return {
              init: init
          };
  
      })();
  
      app.colorModule.init();
  
  })();
subject: format app.js markup