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Browser Js

Lightweight CDP browser control for AI agents. Token-efficient alternative to the built-in browser tool — 3-10x fewer tokens per interaction. Use when browsi...

skill openclawclawhub Free
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Lightweight CDP browser control for AI agents. Token-efficient alternative to the built-in browser tool — 3-10x fewer tokens per interaction. Use when browsi...

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Install for OpenClaw

Quick setup
  1. Download the package from Yavira.
  2. Extract the archive and review SKILL.md first.
  3. Import or place the package into your OpenClaw setup.

Requirements

Target platform
OpenClaw
Install method
Manual import
Extraction
Extract archive
Prerequisites
OpenClaw
Primary doc
SKILL.md

Package facts

Download mode
Yavira redirect
Package format
ZIP package
Source platform
Tencent SkillHub
What's included
SKILL.md, _meta.json, scripts/browser.js, scripts/package-lock.json, scripts/package.json

Validation

  • Use the Yavira download entry.
  • Review SKILL.md after the package is downloaded.
  • Confirm the extracted package contains the expected setup assets.

Install with your agent

Agent handoff

Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.

  1. Download the package from Yavira.
  2. Extract it into a folder your agent can access.
  3. Paste one of the prompts below and point your agent at the extracted folder.
New install

I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.

Upgrade existing

I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.

Trust & source

Release facts

Source
Tencent SkillHub
Verification
Indexed source record
Version
1.5.0

Documentation

ClawHub primary doc Primary doc: SKILL.md 11 sections Open source page

browser-js

Lightweight CLI that talks to Chrome via CDP (Chrome DevTools Protocol). Returns minimal, indexed output that agents can act on immediately — no accessibility tree parsing, no ref hunting.

Setup

# Install dependency (one-time, in the skill scripts/ dir) cd scripts && npm install # Ensure browser is running with CDP enabled. # With OpenClaw: # browser start profile=openclaw # Or manually: # google-chrome --remote-debugging-port=18800 --user-data-dir=~/.browser-data The tool connects to http://127.0.0.1:18800 by default. Override with CDP_URL env var.

Alias setup (optional)

mkdir -p ~/.local/bin cat > ~/.local/bin/bjs << 'WRAPPER' #!/bin/bash exec node /path/to/scripts/browser.js "$@" WRAPPER chmod +x ~/.local/bin/bjs

Commands

bjs tabs List open tabs bjs open <url> Navigate to URL bjs tab <index> Switch to tab bjs newtab [url] Open new tab bjs close [index] Close tab bjs elements [selector] List interactive elements (indexed) bjs click <index> Click element by index bjs type <index> <text> Type into element bjs upload <path> [selector] Upload file to input (bypasses OS dialog) bjs text [selector] Extract visible page text bjs html <selector> Get element HTML bjs eval <js> Run JavaScript in page bjs screenshot [path] Save screenshot bjs scroll <up|down|top|bottom> [px] bjs url Current URL bjs back / forward / refresh bjs wait <ms> Coordinate commands (cross-origin iframes, captchas, overlays): bjs click-xy <x> <y> Click at page coordinates via CDP Input bjs click-xy <x> <y> --double Double-click at coordinates bjs click-xy <x> <y> --right Right-click at coordinates bjs hover-xy <x> <y> Hover at page coordinates bjs drag-xy <x1> <y1> <x2> <y2> Drag between coordinates bjs iframe-rect <selector> Get iframe bounding box (for click-xy targeting)

How it works

elements scans the page for all interactive elements (links, buttons, inputs, selects, etc.) — including those inside shadow DOM (web components). This means sites like Reddit, GitHub, and other modern SPAs that use shadow DOM are fully supported. The scan recursively pierces all shadow roots. Returns a compact numbered list: [0] (link) Hacker News → https://news.ycombinator.com/news [1] (link) new → https://news.ycombinator.com/newest [2] (input:text) q [3] (button) Submit Then click 3 or type 2 search query — immediately actionable, no interpretation needed. Auto-indexing: click and type auto-index elements if not already indexed. You can skip calling elements first and go straight to click/type after open. Call elements explicitly when you need to see what's on the page. After navigation or AJAX changes: Elements get re-indexed automatically on next click/type if stamps are stale. For manual re-index, call elements again. Real mouse events: click uses CDP Input.dispatchMouseEvent (mousePressed + mouseReleased) instead of JS .click(). This triggers React/Vue/Angular synthetic event handlers that ignore plain .click() calls. Works reliably on SPAs like Instagram, GitHub, LinkedIn.

File uploads

upload uses CDP's DOM.setFileInputFiles to inject files directly into hidden <input type="file"> elements — no OS file picker dialog. Works with Instagram, Twitter, any site with file uploads. bjs upload ~/photos/image.jpg # auto-finds input[type=file] bjs upload ~/docs/resume.pdf "input.file-drop" # specific selector

Token efficiency

ApproachTokens per interactionNotesbjs~50-200Indexed list, 1-line responsesbrowser tool (snapshot)~2,000-5,000Full accessibility treebrowser tool + thinking~3,000-8,000Plus reasoning to find refs Over a 10-step flow: ~1,500 tokens (bjs) vs ~30,000-80,000 (browser tool).

Typical flow

bjs open https://example.com # Navigate bjs elements # See what's clickable bjs click 5 # Click element [5] bjs type 12 "hello world" # Type into element [12] bjs text # Read page content bjs screenshot /tmp/result.png # Verify visually

Shadow DOM support

bjs automatically pierces shadow DOM boundaries. Sites built with web components (Reddit, GitHub, etc.) work out of the box — elements, click, type, and text all recurse into shadow roots. No special flags needed.

Coordinate commands (iframes, captchas, overlays)

When you can't use click by index — e.g. the target is inside a cross-origin iframe (captcha checkbox, payment form, OAuth widget) — use coordinate-based commands that dispatch real CDP Input events at the OS level. These bypass all DOM boundaries. Workflow for clicking inside an iframe: bjs iframe-rect 'iframe[title*="hCaptcha"]' # Get bounding box # Output: x=95 y=440 w=302 h=76 center=(246, 478) bjs click-xy 125 458 # Click checkbox position iframe-rect returns the iframe's position on the page. Add offsets to target specific elements inside it (e.g. a checkbox is typically near the left side). Other uses: hover-xy — trigger hover menus, tooltips that need mouse position drag-xy — slider controls, drag-and-drop, canvas interactions click-xy --double — double-click to select text, expand items click-xy --right — context menus When to use coordinate commands vs click: click <index> — always preferred when the element shows up in elements click-xy — only when the target is inside a cross-origin iframe or otherwise unreachable by DOM indexing

Tips

elements with a CSS selector narrows scope: bjs elements ".modal" eval runs arbitrary JS and returns the result — use for custom extraction text caps at 8KB — enough for most pages, won't blow up context html <selector> caps at 10KB — for inspecting specific elements Pipe through grep to filter: bjs elements | grep -i "submit\|login"

Category context

Code helpers, APIs, CLIs, browser automation, testing, and developer operations.

Source: Tencent SkillHub

Largest current source with strong distribution and engagement signals.

Package contents

Included in package
3 Config1 Docs1 Scripts
  • SKILL.md Primary doc
  • scripts/browser.js Scripts
  • _meta.json Config
  • scripts/package-lock.json Config
  • scripts/package.json Config