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fix(plugin-vue): hmr not working when updating script+template at the same time with a template preprocessor #106

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merged 2 commits into from
Jul 15, 2023

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rashfael
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Description

Fixes #28 and #76.

When using pug as a template preprocessor and if you update both script and template at the same time, you will get

Property "foo" was accessed during render but is not defined on instance.

as a browser console error instead of hmr updating properly.
This is because the template compilation relies on the compiled script being already in cache, which in this case it isn't, because the hmr requests both template and script modules at the same time (see #28 for timing).

This fix makes sure that the script cache is always populated before the template is compiled.

Additional context

I'm not sure if calling resolveScript on every template compile is overkill, but resolveScript has an early return if there is already cached result. I could not get the relevant context ("template+script update at same time") on compile time, since this information is lost when the hmr client makes two separate requests.


What is the purpose of this pull request?

  • Bug fix
  • New Feature
  • Documentation update
  • Other

Before submitting the PR, please make sure you do the following

  • Read the Contributing Guidelines.
  • Read the Pull Request Guidelines and follow the Commit Convention.
  • Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
  • Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
  • Ideally, include relevant tests that fail without this PR but pass with it.

@zaxlct
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zaxlct commented Jun 6, 2023

I also encountered the same problem. Why hasn't this PR been merged yet.

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@patak-dev patak-dev left a comment

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This looks good to me

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@haoqunjiang haoqunjiang left a comment

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Thanks! It's a pleasure to review PRs with such detailed explanations.

@haoqunjiang haoqunjiang changed the title fix(plugin-vue): hmr not working when updating script+template at the same time with a template preprocessor (fix #28, #76) fix(plugin-vue): hmr not working when updating script+template at the same time with a template preprocessor Jul 15, 2023
@haoqunjiang haoqunjiang merged commit 93c444c into vitejs:main Jul 15, 2023
@rashfael rashfael deleted the template-preprocessor-hmr branch July 27, 2023 14:35
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Successfully merging this pull request may close these issues.

HMR is fetching multiple updated modules triggered by the same change in parallel and not in series
4 participants