#justjavac/cdp

#Features

• Target parsing: 9222, host:port, HTTP discovery URLs, browser/page WebSocket URLs.
• Discovery: /json/version, /json/list, /json/protocol.
• Commands: raw, bundled-schema-validated, remote-schema-checked, generated typed builders.
• Events: buffering, filtering, synchronous handlers.
• Targets: browser-level Target.* helpers and flattened sessions.
• Launch: optional Chrome/Edge/Chromium startup with remote debugging.

#Packages

#Docs

#Quick Start

moon install

chrome --remote-debugging-port=9222 --user-data-dir=/tmp/mbt-cdp-profile

& "C:\Program Files\Google\Chrome\Application\chrome.exe" `
  --remote-debugging-port=9222 `
  --user-data-dir="$env:TEMP\mbt-cdp-profile"

let target = @client.parse_cdp_target("9222")
let browser = @client.connect_cdp_browser_target(target)
defer browser.close()

let response = browser.send_schema_command("Browser.getVersion")
println(@client.cdp_response_result_json(response).stringify())

let page = @client.connect_cdp_page_target(@client.parse_cdp_target("9222"))
defer page.close()

let response = page.send_schema_command(
  "Runtime.evaluate",
  params={
    "expression": "1 + 1",
    "returnByValue": true,
  },
)
println(@client.cdp_response_result_json(response).stringify())

#Command Modes

• Raw: send_cdp_command + recv_cdp_response.
• Schema-aware: send_schema_command.
• Remote-schema-aware: send_remote_schema_command.
• Typed: generated builders + send_cdp_message.

#Examples

$env:MBT_CDP_TARGET = "9222"
$env:MBT_CDP_EXAMPLE = "discover_version"
moon -C examples run cmd

$env:MBT_CDP_EXAMPLE = "runtime_evaluate"
moon -C examples run cmd

#Checks

moon test
node tools/check_non_generated_coverage.mjs 100

$env:MBT_CDP_E2E = "1"
$env:MBT_CDP_TARGET = "9222"
moon test client --filter "*real Chrome CDP E2E*"

#License