Created
November 14, 2022 16:27
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import { PlaywrightCrawler, Dataset } from 'crawlee'; | |
const maxRepoCount = 100; | |
const crawler = new PlaywrightCrawler({ | |
requestHandler: async ({ page, infiniteScroll }) => { | |
// Click the Load more button and scroll until | |
// `maxRepoCount` repositories are found. | |
console.log('Clicking and scrolling.'); | |
await infiniteScroll({ | |
buttonSelector: 'text=Load more', | |
stopScrollCallback: async () => { | |
const repoCount = (await page.$$('article.border')).length; | |
return repoCount >= maxRepoCount; | |
}, | |
}); | |
// Extract data from the page. Selecting all 'article' elements | |
// will return all the repository cards we're looking for. | |
const repos = await page.$$eval('article.border', (repoCards) => { | |
return repoCards.map(card => { | |
const [user, repo] = card.querySelectorAll('h3 a'); | |
const stars = card.querySelector('#repo-stars-counter-star').getAttribute('title'); | |
const description = card.querySelector('div.px-3 > p + div'); | |
const topics = card.querySelectorAll('a.topic-tag'); | |
const toText = (element) => element && element.innerText.trim(); | |
const parseNumber = (text) => Number(text.replace(/,/g, '')); | |
return { | |
user: toText(user), | |
repo: toText(repo), | |
url: repo.href, | |
stars: parseNumber(stars), | |
description: toText(description), | |
topics: Array.from(topics).map((t) => toText(t)), | |
}; | |
}); | |
}); | |
// Save the results to disk. | |
console.log(`We extracted ${repos.length} repositories.`); | |
await Dataset.pushData(repos); | |
await Dataset.exportToCSV('repositories'); | |
} | |
}) | |
await crawler.run(['https://github.com/topics/javascript']); |
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