anchor.diff:  
   if SECTION == "models"
       script(src="/assets/js/vendor/chart.min.js")
  -    script(src="/assets/js/models.js?v#{V_JS}" type="module")
   
   script
       if quickstart
  
positive.code:         | (ga.q=ga.q||[]).push(arguments)}; ga.l=+new Date;
          | ga('create', '#{ANALYTICS}', 'auto'); ga('send', 'pageview');
  
  
  if IS_PAGE
      script
          | ((window.gitter = {}).chat = {}).options = {
          |     useStyles: false,
          |     activationElement: '.js-gitter-button',
          |     targetElement: '.js-gitter',
          |     room: '!{SOCIAL.gitter}'
          | };
      script(src="https://sidecar.gitter.im/dist/sidecar.v1.js" async defer)
  
  
  
negative.code: - ModelLoader = "new ModelLoader('" + MODELS_REPO + "'," + JSON.stringify(CURRENT_MODELS) + "," + JSON.stringify(MODEL_LICENSES) + "," + JSON.stringify(MODEL_BENCHMARKS) + ");"
  - ModelComparer = "new ModelComparer('" + MODELS_REPO + "'," + JSON.stringify(MODEL_LICENSES) + "," + JSON.stringify(MODEL_BENCHMARKS) + "," + JSON.stringify(LANGUAGES) + "," + JSON.stringify(MODEL_META) + "," + JSON.stringify(default_models || false) + ");"
  
  if environment == "deploy"
      //- DEPLOY: use compiled rollup.js and instantiate classes directly
      script(src="/assets/js/rollup.js")
      script
          !=ProgressBar
          if changelog
              !=Changelog
          if IS_PAGE
              !=NavHighlighter
              !=GitHubEmbed
          if HAS_MODELS
              !=ModeLoader
          if compare_models
              !=ModelComparer
  else
      //- DEVELOPMENT: Use ES6 modules
      script(type="module")
          | import ProgressBar from '/assets/js/progress.js';
          !=ProgressBar
          if changelog
              | import Changelog from '/assets/js/changelog.js';
              !=Changelog
          if IS_PAGE
              | import NavHighlighter from '/assets/js/nav-highlighter.js';
              !=NavHighlighter
              | import GitHubEmbed from '/assets/js/github-embed.js';
              !=GitHubEmbed
          if HAS_MODELS
              | import { ModelLoader } from '/assets/js/models.js';
              !=ModelLoader
          if compare_models
              | import { ModelComparer } from '/assets/js/models.js';
              !=ModelComparer
  