hubcap version

Print the browser version, protocol version, user-agent string, and V8 engine version.

When to use

Use version to check what browser and protocol you are connected to, or to verify capabilities before running commands that depend on a specific Chrome version. Use info instead if you need page-level details like title or URL.

Usage

hubcap version

Arguments

None.

Flags

None.

Output

Field	Type	Description
browser	string	Browser name and version (e.g. `Chrome/120.0.6099.109`)
protocol	string	DevTools protocol version (e.g. `1.3`)
userAgent	string	Full user-agent string reported by the browser
v8	string	V8 JavaScript engine version

{
  "browser": "Chrome/120.0.6099.109",
  "protocol": "1.3",
  "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.6099.109 Safari/537.36",
  "v8": "12.0.267.8"
}

Errors

Condition	Exit code	Stderr
Chrome not connected	2	`error: connecting to Chrome: ...`
Timeout	3	`error: timeout`

Examples

Print the browser version:

hubcap version

Check whether the connected browser is at least Chrome 120:

hubcap version | jq -r '.browser' | grep -q '12[0-9]\.' && echo "OK"

Use the protocol version in a script that selects behaviour by version:

PROTO=$(hubcap version | jq -r '.protocol')
echo "Protocol: $PROTO"