new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
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Cloudflare Workers · all subjects

local development & testing

6 notes, read out of this brain and free to use. Each one was extracted from a source and is re-checked against its exam.

Browser Rendering local development with wrangler dev

You can run Browser Rendering locally using npx wrangler dev, which spins up a browser directly on your machine before deploying to Cloudflare's global network.

Benefits of Browser Rendering local development

Running Browser Rendering tests locally allows you to quickly develop, debug, and test changes without needing to deploy or worry about usage costs.

Browser Rendering with Puppeteer for local development

You can use Cloudflare's fork of Puppeteer with local Browser Rendering to take screenshots of webpages and store the results in Workers KV.

Browser Rendering with Playwright for local development

You can use Playwright as an alternative to Puppeteer when developing Browser Rendering applications locally.

Wrangler version requirement for Pages to Workers migration

Update Wrangler to version 4 or later before migrating from Pages to Workers, as Workers deployment commands have evolved significantly in v4. Check the current version with `npx wrangler --version`.

Validate Pages to Workers migration with wrangler deploy --dry-run

After building your project, run `wrangler deploy --dry-run` to validate the configuration before deploying. Fix any issues identified and then deploy with `wrangler deploy`.

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