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feat(compiler-sfc): support import attributes and using syntax in TS #8786

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merged 3 commits into from
Dec 8, 2023

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@sxzz sxzz commented Jul 14, 2023

upgrade babel, add importAttributes and explicitResourceManagement for parser plugins.
TypeScript 5.2 already supports these syntaxes.

relate microsoft/TypeScript#53656

Example

import json from "./foo.json" with { type: "json" }
import json from "./foo.json" assert { type: "json" } // deprecated & legacy syntax
using foo = useFoo()

@sxzz sxzz requested a review from yyx990803 July 14, 2023 17:23
@sxzz sxzz added the ready to merge The PR is ready to be merged. label Jul 14, 2023
@sxzz sxzz changed the title feat: support import attributes syntax feat(compiler-sfc): support import attributes syntax Jul 14, 2023
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github-actions bot commented Aug 21, 2023

Size Report

Bundles

File Size Gzip Brotli
runtime-dom.global.prod.js 85.9 kB 32.6 kB 29.5 kB
vue.global.prod.js 132 kB 49.3 kB 44.4 kB

Usages

Name Size Gzip Brotli
createApp 47.9 kB 18.8 kB 17.2 kB
createSSRApp 50.6 kB 19.9 kB 18.2 kB
defineCustomElement 50.3 kB 19.6 kB 17.9 kB
overall 61.2 kB 23.7 kB 21.6 kB

@sxzz sxzz changed the title feat(compiler-sfc): support import attributes syntax feat(compiler-sfc): support import attributes and with syntax Aug 26, 2023
@sxzz sxzz changed the title feat(compiler-sfc): support import attributes and with syntax feat(compiler-sfc): support import attributes and using syntax in TS Aug 26, 2023
@sxzz sxzz changed the base branch from main to minor October 20, 2023 09:09
plugins.push(['typescript', { dts }])
plugins.push(['typescript', { dts }], 'explicitResourceManagement')
if (!plugins.includes('importAssertions')) {
plugins.push(['importAttributes', { deprecatedAssertSyntax: true }])
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Why support the deprecated syntax here?

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Currently in typescript@5.2 only support import assert syntax (deprecatedAssertSyntax). In ts@5.3 it support both.

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@yyx990803 yyx990803 Oct 20, 2023

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I think we should only support the latest version.

Also, the includes check should also check importAttributes? This way the user can override the default by specifying importAttributes with their own options, if needed.

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@sxzz sxzz Oct 20, 2023

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The latest version of TypeScript is 5.2, and 5.3 will be released on 2023-11-14, which is less than one month (and the beta version is already released). Vue 3.4 stable could be likely later than it.

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yyx990803 commented Dec 8, 2023

Made a few adjustments in efddf96:

  • importAttributes should apply to plain JS as well, not just TS.
  • Use latest importAttributes by default (no deprecated syntax support) now that TS 5.3 is already out.
  • Users can override the internal importAttributes plugin with their own to enable the deprecated syntax.
  • rewriteDefault should also go through the same plugin resolution.

@yyx990803 yyx990803 merged commit 5b2bd1d into minor Dec 8, 2023
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@yyx990803 yyx990803 deleted the feat/ts-assert branch December 8, 2023 07:22
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