Save-Data emulation sampler

#442376618 DevTools / Emulation Save-Data request header + navigator.connection.saveData

Goal

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.

How to use

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.

Probe output

Ready.