Puppeteer skill

Skill Pyfagorass/bookofspells/skills/lambdatest/puppeteer-skill

📖 The Book of Spells: a curated, enchanted index of real LLM tooling — and a pipeline that gathers SKILL.md skills from many houses into one searchable shelf.

Install

npx -y skills add Pyfagorass/bookofspells --skill puppeteer-skill

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

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What its author says it does

Copied from the file, not written here

Generates Puppeteer scripts for browser automation, scraping, and PDF generation. Triggers on: "Puppeteer", "headless Chrome", "page.goto", "scrape", "PDF generation".

The file declares its own license as MIT. That is the author’s claim about this one file, and it is not the same thing as the license GitHub reports for the repository, which is listed with the other numbers below.

SKILL.md

4.1 KB, as published. Nobody here has run it

Puppeteer Automation Skill

Core Patterns

Basic Script

const puppeteer = require('puppeteer');

(async () => {
    const browser = await puppeteer.launch({ headless: 'new' });
    const page = await browser.newPage();
    await page.setViewport({ width: 1280, height: 720 });

    await page.goto('https://example.com', { waitUntil: 'networkidle0' });
    await page.type('#username', '[email protected]');
    await page.type('#password', 'password123');
    await page.click('button[type="submit"]');
    await page.waitForNavigation({ waitUntil: 'networkidle0' });

    const title = await page.title();
    console.log('Title:', title);

    await browser.close();
})();

Wait Strategies

// Wait for selector
await page.waitForSelector('.result', { visible: true, timeout: 10000 });

// Wait for navigation
await Promise.all([
    page.waitForNavigation({ waitUntil: 'networkidle0' }),
    page.click('a.nav-link'),
]);

// Wait for function
await page.waitForFunction('document.querySelector(".count").innerText === "5"');

// Wait for network request
const response = await page.waitForResponse(resp =>
    resp.url().includes('/api/data') && resp.status() === 200
);

Screenshot & PDF

await page.screenshot({ path: 'screenshot.png', fullPage: true });
await page.pdf({ path: 'page.pdf', format: 'A4', printBackground: true });

Network Interception

await page.setRequestInterception(true);
page.on('request', request => {
    if (request.resourceType() === 'image') request.abort();
    else request.continue();
});

// Mock API
page.on('request', request => {
    if (request.url().includes('/api/data')) {
        request.respond({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify({ items: [] }),
        });
    } else request.continue();
});

TestMu AI Cloud

For full setup, capabilities, and shared capability reference, see reference/cloud-integration.md.

const capabilities = {
    browserName: 'Chrome', browserVersion: 'latest',
    'LT:Options': {
        platform: 'Windows 11', build: 'Puppeteer Build',
        user: process.env.LT_USERNAME, accessKey: process.env.LT_ACCESS_KEY,
    },
};

const browser = await puppeteer.connect({
    browserWSEndpoint: `wss://cdp.lambdatest.com/puppeteer?capabilities=${encodeURIComponent(JSON.stringify(capabilities))}`,
});

Quick Reference

Task	Code
Launch headed	`puppeteer.launch({ headless: false })`
Evaluate JS	`await page.evaluate(() => document.title)`
Extract text	`await page.$eval('.el', el => el.textContent)`
Extract all	`await page.$$eval('.items', els => els.map(e => e.textContent))`
Set cookie	`await page.setCookie({ name: 'token', value: 'abc' })`
Emulate device	`await page.emulate(puppeteer.devices['iPhone 12'])`

Deep Patterns → `reference/playbook.md`

§	Section	Lines
1	Production Setup & Configuration	Launch options, Jest integration
2	Page Object Pattern	BasePage, LoginPage, DashboardPage
3	Network Interception & Mocking	Request mock, response capture
4	Wait Strategies	DOM, network, custom conditions
5	Screenshots, PDF & Media	Full page, clip, PDF, video
6	Authentication & Cookies	API login, session save/restore
7	iFrame, Dialog & File Operations	Upload, download, dialogs
8	Performance & Metrics	Web Vitals, Lighthouse, coverage
9	Accessibility Testing	axe-core integration
10	CI/CD Integration	GitHub Actions, Docker
11	Debugging Quick-Reference	11 common problems
12	Best Practices Checklist	13 items