chore: improve the types for $set and $delete
Created by: Alfred-Skyblue
relate: vue/core
Enhance the type hints for $set and $delete.
What kind of change does this PR introduce? (check at least one)
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Bugfix -
Feature -
Code style update -
Refactor -
Build-related changes -
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Does this PR introduce a breaking change? (check one)
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No
If yes, please describe the impact and migration path for existing applications:
The PR fulfills these requirements:
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It's submitted to the mainbranch for v2.x (or to a previous version branch) -
When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number) -
All tests are passing: https://github.com/vuejs/vue/blob/dev/.github/CONTRIBUTING.md#development-setup -
New/updated tests are included
If adding a new feature, the PR's description includes:
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A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)
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