if client is requesting path, what is not filename, but directory name, then it is not server internal error, it is just simple resource not found
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[x] It's really useful if your PR references an issue where it is discussed ahead of time. In many cases, features are absent for a reason. For large changes, please create an RFC: https://github.com/sveltejs/rfcs
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[ ] Ideally, include a test that fails without this PR but passes with it.
Tests
[ ] Run the tests with npm test and lint the project with npm run lint
Fixes https://github.com/sveltejs/sapper/issues/1733
if client is requesting path, what is not filename, but directory name, then it is not server internal error, it is just simple resource not found
Before submitting the PR, please make sure you do the following
Tests
npm testand lint the project withnpm run lint