[dblotsky]

Just use Make.

Takes just as long to learn, and is transferrable everywhere.

[ricardobeat]

These are not task runners. Make alone will give you about 2% of what you'll need to bundle a modern web app.

[dblotsky]

Make can run all the tools like babel, uglify, etc.

[rejschaap]

Are there any good examples of projects using Make for a web app?

[dblotsky]

Facetious answer: Are there any good examples of projects using Parcel for a web app? ;)

Real answer: probably, but a ton of production code is closed-source.

But why restrict to web apps? Most influential software projects in the world use Make.