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Blob is not instance of Blob

See original GitHub issue

It appears that Blob is not an instance of Blob. Here’s a minimal repro on StackBlitz using Vitest: https://stackblitz.com/edit/happy-dom-bug-blob-prototype?file=README.md

This caused the following error when using the @web-std/file package after upgrading from vitest@0.11.0 to vitest@0.12.0

TypeError: Class extends value does not have valid prototype property undefined Object.<anonymous> node_modules/@web-std/file/dist/src/file.cjs:59:15 Object.<anonymous> node_modules/@web-std/file/dist/src/lib.node.cjs:6:12

I’m not sure if there’s also a bug in Vitest or not, but the fact that Blob.prototype is undefined appears to be the root cause. The error only occurs when using the happy-dom environment, so I believe this is the appropriate place to open an issue.

Issue Analytics

State:
Created a year ago
Comments:6 (3 by maintainers)

Top GitHub Comments

2reactions

davidortner-ipexcommented, Oct 11, 2022

I am continuing the work in #520 right now where we will replace the Happy DOM URL with Nodes version of it. Hopefully that will solve this issue then.

1reaction

capricorn86commented, May 20, 2022

@nakleiderer this should be solved in the latest version of Vitest 🙂