hubcap console - Capture browser console messages

When to use

Capture console messages from the browser in real time, including log, warn, error, info, and debug levels. Use errors if you only need JavaScript exceptions with stack traces.

Usage

hubcap console [--duration <duration>]

Arguments

None.

Flags

Flag	Type	Default	Description
`--duration`	duration	`0`	How long to capture; 0 = until interrupted

Output

NDJSON stream written to stdout. Each line is a JSON object representing a console message.

Field	Type	Description
`type`	string	Console level: `"log"`, `"warn"`, `"error"`, `"info"`, or `"debug"`
`text`	string	The console message text

{"type":"log","text":"Page loaded successfully"}

{"type":"warn","text":"Deprecated API usage detected"}

{"type":"error","text":"Failed to fetch resource"}

Errors

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

Examples

Stream all console messages until Ctrl-C:

hubcap console

Capture console output for 15 seconds:

hubcap console --duration 15s

Filter for errors and warnings only:

hubcap console | jq 'select(.type == "error" or .type == "warn")'

Navigate to a page and capture its console output:

hubcap goto --wait "https://example.com" && hubcap console --duration 10s | jq -r '.text'