gecko-dev/servo/docs/COMMAND_LINE_ARGS.md

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Command Line Arguments

General

You can see available commands with:

./mach -h
./mach <sub-command> -h

Only arguments that need more explanation will be documented here.

Run

Enable Experimental Features

Use --pref to enable experimental features like experimental DOM API, JavaScript API and CSS properties.

e.g. To enable flex and flex-direction css properties:

./mach run -d -- --pref layout.flex.enabled --pref layout.flex-direction.enabled ...

You can find all the available preferences at resources/prefs.json.

Debugging

Remote Debugging

Use --devtools 6000 to start the devtools server on port 6000.

e.g.

./mach run -d --devtools 6000 https://servo.org

To connect to the server, follow this guide.