Fix: Synchronous Watcher Issue Caused by Locale Setting Order

[lcjnil]

reproduction: https://codesandbox.io/p/devbox/vue-i18n-9-template-forked-ffq44z

This PR adjusts the order of operations in the locale setter to rectify the issue where, during locale updates, a synchronous watcher may trigger after modifying the _locale.value (as seen in this file, but before updating the _context. This sequence led to errors because the translation mechanism relies exclusively on _context, not _locale.

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
core.esm-browser.prod.js	37.16 kB	11.35 kB	10.12 kB
core.global.prod.js	30.50 kB	10.55 kB	9.52 kB
core.prod.cjs	0.88 kB	0.43 kB	0.34 kB
core.runtime.esm-browser.prod.js	22.87 kB	7.45 kB	6.65 kB
core.runtime.global.prod.js	17.48 kB	6.81 kB	6.12 kB
message-compiler.esm-browser.prod.js	19.28 kB	5.76 kB	5.14 kB
message-compiler.global.prod.js	17.32 kB	5.54 kB	4.97 kB
message-compiler.prod.cjs	57.50 kB	10.06 kB	8.60 kB
petite-vue-i18n-core.esm-browser.prod.js	20.35 kB (-0.01 kB)	6.84 kB (-0.00 kB)	6.15 kB (-0.00 kB)
petite-vue-i18n-core.global.prod.js	15.63 kB (-0.01 kB)	6.05 kB	5.47 kB (+0.00 kB)
petite-vue-i18n-core.prod.cjs	25.96 kB (-0.03 kB)	6.14 kB (-0.01 kB)	5.31 kB
petite-vue-i18n.esm-browser.prod.js	36.85 kB (-0.01 kB)	11.32 kB (-0.00 kB)	10.15 kB (-0.01 kB)
petite-vue-i18n.global.prod.js	29.85 kB (-0.01 kB)	10.18 kB	9.20 kB (+0.01 kB)
petite-vue-i18n.prod.cjs	25.64 kB (-0.03 kB)	6.05 kB (-0.00 kB)	5.24 kB (-0.01 kB)
petite-vue-i18n.runtime.esm-browser.prod.js	22.41 kB (-0.01 kB)	7.32 kB (-0.00 kB)	6.60 kB (-0.00 kB)
petite-vue-i18n.runtime.global.prod.js	16.85 kB (-0.01 kB)	6.41 kB (-0.00 kB)	5.80 kB (-0.00 kB)
vue-i18n.esm-browser.prod.js	56.42 kB (-0.01 kB)	16.42 kB (-0.00 kB)	14.68 kB (+0.01 kB)
vue-i18n.global.prod.js	46.04 kB (-0.01 kB)	14.87 kB (-0.00 kB)	13.37 kB (+0.00 kB)
vue-i18n.prod.cjs	0.72 kB	0.34 kB	0.28 kB
vue-i18n.runtime.esm-browser.prod.js	41.99 kB (-0.01 kB)	12.43 kB	11.21 kB (+0.06 kB)
vue-i18n.runtime.global.prod.js	33.03 kB (-0.01 kB)	11.13 kB (+0.00 kB)	10.05 kB (-0.02 kB)

Usages

Name	Size	Gzip	Brotli
packages/size-check-core (@intlify/core)	9.10 kB	3.76 kB	3.41 kB
packages/size-check-petite-vue-i18n (petite-vue-i18n)	77.81 kB (-0.01 kB)	30.33 kB (+0.00 kB)	27.29 kB (+0.01 kB)
packages/size-check-vue-i18n (vue-i18n)	82.81 kB (-0.01 kB)	31.74 kB (-0.00 kB)	28.51 kB (-0.02 kB)

[kazupon]

Thank you for your contribution!

The CI is not working correctly due to corepack issue.
I have pushed a commit to the master branch that fixes the issue.
If you pull in that commit, it should work correctly.
Would you please do that? 🙏

[pkg-pr-new]

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@intlify/core-base

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@intlify/devtools-types

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petite-vue-i18n

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@intlify/shared

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@intlify/message-compiler

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vue-i18n

npm i https://pkg.pr.new/vue-i18n@2104

@intlify/vue-i18n-core

npm i https://pkg.pr.new/@intlify/vue-i18n-core@2104

commit: 0279572

[kazupon]

never mind for my comment.

vue-i18n GitHub PR has just been able to update from branches.

CI results are all green :)
Thanks!