My web app is mostly executed on the server rather than on the client/browser. Where interactivity is needed, I use jQuery to do it. This is really my preference rather than a recommendation. I come mostly from backend experience and hence use minimal JS code. In this case, using ReactJS is a bloat. Some folks comment that for performance plain old JS (sometimes called vanilla JS) should be used rather than jQuery. But jQuery simplifies developer's effort because of its maturity and cross-browser compatibility. My app doesn't need to be blazingly fast. jQuery helps me to write more reliable code in shorter time.