Codewars Scraper
Spider read codewars.com in 1.5 s without a browser and returned 70 lines of clean markdown, including sections like "Forum", "Topics" and "Kata Ranking".
# Forum### Topics:The forum is deprecated and will become read-only.## Kata Ranking## AboutThis topic is meant to discuss the kata ranking system, used for determining the dan/kyu ranking of a kata.## Draft StructureThe following is a draft of what a ranking structure could look like. The idea is that this structure would be used as a guideline as to what a kata would be ranked. It would be used in addition to other factors such as average solution length, average time to complete, and possibly other factors.The emphasis on this structure is to try to create a skills tree that encompases the many aspects of being a complete developer.#### White (Beginner)#### Yellow (Novice)#### Blue (Competent)* simple detailed requirements#### Purple (Proficient)* complex detailed requirements* simple reverse engineering* intermediate meta-programming#### Black (Expert)* complex reverse engineering* expert regex/string parsingA more detailed draft can be found here## Related Topics:## Discuss:#### **##### You have not created any collections yet.Collections are a way for you to organize kata so that you can create your own training routines.Every collection you create is public and automatically sharable with other warriors.After you have added a few kata to a collection you and others can train on the kata contained within the collection.You must wait until you have earned at least 20 honor before you can create new collections.Set the name for your new collection. Remember, this is going to be visible by everyone so think of something that others will understand.The same call, in code.
The capture above came back as markdown. These examples add a key, so you get browser rendering, proxies, and concurrency on codewars.com.
import { SpiderBrowser } from "spider-browser";
const spider = new SpiderBrowser({
apiKey: process.env.SPIDER_API_KEY!,
});
await spider.connect();
const page = spider.page!;
await page.goto("https://www.codewars.com/kata/search/javascript?q=&order_by=popularity+desc");
// No selectors, no schema. Spider reads the page and names the fields.
const data = await page.scrape();
console.log(data);
await spider.close();import { SpiderBrowser } from "spider-browser";
const spider = new SpiderBrowser({
apiKey: process.env.SPIDER_API_KEY!,
});
await spider.connect();
const page = spider.page!;
await page.goto("https://www.codewars.com/kata/search/javascript?q=&order_by=popularity+desc");
await page.content(8000);
const data = await page.evaluate(`(() => {
const katas = [];
document.querySelectorAll("[class*='kata-row'], .list-item").forEach(el => {
const name = el.querySelector("a[href*='/kata/']")?.textContent?.trim();
const rank = el.querySelector("[class*='rank']")?.textContent?.trim();
const completions = el.querySelector("[class*='completed']")?.textContent?.trim();
const tags = [...el.querySelectorAll("[class*='tag'] span")].map(t => t.textContent?.trim());
if (name) katas.push({ name, rank, completions, tags });
});
return JSON.stringify({ total: katas.length, katas: katas.slice(0, 15) });
})()`);
console.log(JSON.parse(data));
await spider.close();Ready for volume? Get an API key →
Fields you can pull.
Spider names these from the page. The capture above came back as markdown; the same
call with return_format: "json" returns them as keys.
What codewars.com costs to scrape.
The capture above cost $0.000961 to fetch. Pricing is $1 per GB of pre-transformation bandwidth plus $0.001 per CPU minute, so a page like this one lands at a fraction of a cent. Failed requests are billed at $0.
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- Balance never expires
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