2016 Frontend Development Q&A: From jQuery to React, Babel, and Modern Tooling

A developer asks a seasoned frontend engineer for advice on building a page that displays user activity. The engineer immediately dismisses jQuery as outdated and recommends React, explaining that React and React DOM are needed to render JSX, an XML‑like syntax for writing UI.

The conversation then covers the necessity of Babel to transpile modern JavaScript (ES2016+) to older browsers, the role of ECMAScript versions (ES5, ES6, ES2016+), and why using the latest syntax is preferred.

Module management is introduced: npm for installing dependencies, AMD/CommonJS as module formats, Browserify and Webpack as bundlers, and the evolution from Grunt/Gulp to Webpack. SystemJS is mentioned as a dynamic loader, and the future impact of HTTP/2 on bundling.

The engineer advises using the Fetch API (or polyfills like Axios, Request, Bluebird) instead of jQuery AJAX, and explains how Promises and async/await simplify asynchronous code, requiring Babel stage‑3 plugins.

TypeScript and Flow are presented as static type checkers for JavaScript, with TypeScript being a superset of ES6 that compiles to JavaScript, while Flow only performs type checking.

When the developer wants a simple solution to display data, the engineer suggests that a template engine could suffice, but still recommends the modern stack: TypeScript + SystemJS + Babel (or just ES6 template literals) with a bundler like Webpack.

The dialogue ends with a reflection on the fast‑moving JavaScript ecosystem, hinting at future technologies such as Elm, WebAssembly, and a possible move back to backend languages like Python.