A way to override express' app.render function

override-app-render.ts

app.use((req: express.Request, resp: express.Response, next?: Function) => {
    var render = resp.render;

    resp.render = (view: string, options?: any, fn?: any) => {
      if ('function' == typeof options) {
        fn = options;
        options = {};
      }
      render.call(resp, view, options, (err, html) => {
        if (html) {
          html = typo(html).typogrify();
        }
        if (fn) {
          fn(err, html);
        } else {
          if (err) next(err);
          resp.send(html);
        }
      });
    };
    next();
  })