Many Flask projects nowadays still use mostly static HTML, WTForms and just a bit of AJAX. All the JavaScript is usually included straight from .js files or just minified with Python tools like webassets. But the JavaScript ecosystem has evolved a lot - one can now use tools like Babel to write modern JS even when targeting older browsers and a Webpack+Babel build is very straightforward and allows for advanced preprocessing of JavaScript code. In this talk we’ll even go one step further …