Save-Data emulation sampler

What this page checks

This sampler helps validate that Save-Data emulation updates both:

1. navigator.connection.saveData in JS, and
2. the outgoing request header Save-Data: on.

Steps

1. Open DevTools and go to Network conditions.
2. Set Save-Data to on and click "Run probe" below.
3. Set Save-Data to off or default and run again.
4. Compare JS value and reflected request header in the output.