CF-Incidents Workers, Cloudflare CLI - Wrangler and cf now upload source maps by default

[ENF News Bot]

From Wrangler 4.150.0, wrangler deploy, wrangler versions upload, and wrangler preview generate and upload source maps by default. You no longer need to set upload_source_maps to get stack traces with your original file names and line numbers.

cf deploy also uploads source maps by default. With the Cloudflare Vite plugin 1.64.0 or later, Worker builds generate source maps by default, and cf deploy uploads every source map in the build output.

Remapped stack traces show up in Workers Logs, real-time logs, Tail Workers, and Workers Issues. Source maps are applied after your Worker runs, so they don't affect CPU time, bundle size, or cold starts.

If your Worker uses a custom build, Wrangler uploads any external source maps it finds. Maps it can't resolve, such as inline data: source maps, are skipped instead of failing the upload. Set upload_source_maps to true if you'd prefer the upload to fail.

To opt out with Wrangler, set upload_source_maps to false:

{
	"upload_source_maps": false
}

upload_source_maps = false

To opt out with cf or the Cloudflare Vite plugin, set build.sourcemap to false for your Worker's Vite environment. Refer to Disable source maps.

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