See the docs here for a better description than I can write: https://developers.cloudflare.com/workers/cli-wrangler/commands#dev https://developers.cloudflare.c

See the docs here for a better description than I can write: https://developers.cloudflare.com/workers/cli-wrangler/commands#dev https://developers.cloudflare.com/workers/cli-wrangler/comma... Basically your dev environment runs in the cloud on Cloudflare, then opens a mini browser - within your browser - (with it's own dev tools) for you to send HTTP requests to the dev environment.