fix: remove overzealous reactive_declaration_non_reactive_property warning
#14663
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…warning fixes #14532 This removes the `reactive_declaration_non_reactive_property` warning altogether. The first version caused many false positives at compile time. The refined runtime version (introduced in #14192) was hoped to fix this, but it turns out we now get loads of false positives at runtime. The ones I've seen essentially revolve around a signal being created while reading or writing (to) something in a reactive statement, but in a matter which is harmless. For example writing to `$$props` or `$$restProps` (like `$: { if ($$restProps.foo) $$restProps.bar = 'x' }`) creates a new signal under the hood, as the props now temporarily can get out of sync, and we need a backing signal for that. For this we call the `prop` function, which in turn creates several deriveds and may also read from user-land signals that were not read previously - in other words, it's not possible to fix the problem by marking all internal signals (which would be a very very tedious undertaking). The potential benefits of this warning are vastly outnumbered by the false positives it causes, so we should just remove it.
🦋 Changeset detectedLatest commit: 196c68a The changes in this PR will be included in the next version bump. This PR includes changesets to release 1 package
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preview: https://svelte-dev-git-preview-svelte-14663-svelte.vercel.app/ this is an automated message |
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🙏 🙇 This warning has been the source of a massive performance regression for Layerchart's |
trueadm
approved these changes
Dec 11, 2024
Merged
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fixes #14532
This removes the
reactive_declaration_non_reactive_propertywarning altogether. The first version caused many false positives at compile time. The refined runtime version (introduced in #14192) was hoped to fix this, but it turns out we now get loads of false positives at runtime. The ones I've seen essentially revolve around a signal being created while reading or writing (to) something in a reactive statement, but in a matter which is harmless.For example writing to
$$propsor$$restProps(like$: { if ($$restProps.foo) $$restProps.bar = 'x' }) creates a new signal under the hood, as the props now temporarily can get out of sync, and we need a backing signal for that. For this we call thepropfunction, which in turn creates several deriveds and may also read from user-land signals that were not read previously - in other words, it's not possible to fix the problem by marking all internal signals (which would be a very very tedious undertaking).The potential benefits of this warning are vastly outnumbered by the false positives it causes, so we should just remove it.
Before submitting the PR, please make sure you do the following
feat:,fix:,chore:, ordocs:.packages/svelte/src, add a changeset (npx changeset).Tests and linting
pnpm testand lint the project withpnpm lint