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perf(jsx): cache TypeScript Babel plugin config #799

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Merged
sapphi-red merged 3 commits into from
Jun 23, 2026
+25 −20
Merged

perf(jsx): cache TypeScript Babel plugin config #799

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3538635
perf(jsx): cache TypeScript Babel plugin config
TheAlexLichter Jun 21, 2026
f072348
test(jsx): focus TypeScript plugin cache coverage
TheAlexLichter Jun 21, 2026
724f46b
refactor: tweak
sapphi-red Jun 23, 2026
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45 changes: 25 additions & 20 deletions packages/plugin-vue-jsx/src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,30 @@ function vueJsxPlugin(options: Options = {}): Plugin {
...babelPluginOptions
} = options
const filter = createFilter(include, exclude)
let tsPluginPromise: Promise<babel.ConfigItem> | undefined
const resolveTsPlugin = () => {
tsPluginPromise ??=
tsTransform === 'built-in'
? // @ts-ignore missing type
import('@babel/plugin-syntax-typescript').then(
(r) =>
babel.createConfigItem([r.default, { isTSX: true }], {
type: 'plugin',
})!,
)
: // @ts-ignore missing type
import('@babel/plugin-transform-typescript').then(
(r) =>
babel.createConfigItem(
[
r.default,
{ ...tsPluginOptions, isTSX: true, allowExtensions: true },
],
{ type: 'plugin' },
)!,
)
return tsPluginPromise
}

return {
name: 'vite:vue-jsx',
Expand Down Expand Up @@ -142,26 +166,7 @@ function vueJsxPlugin(options: Options = {}): Plugin {
if (filter(id) || filter(filepath)) {
const plugins = [[jsx, babelPluginOptions], ...babelPlugins]
if (id.endsWith('.tsx') || filepath.endsWith('.tsx')) {
if (tsTransform === 'built-in') {
// For 'built-in' add "syntax" plugin
// to enable parsing without transformation.
plugins.push([
// @ts-ignore missing type
await import('@babel/plugin-syntax-typescript').then(
(r) => r.default,
),
{ isTSX: true },
])
} else {
plugins.push([
// @ts-ignore missing type
await import('@babel/plugin-transform-typescript').then(
(r) => r.default,
),
// @ts-ignore
{ ...tsPluginOptions, isTSX: true, allowExtensions: true },
])
}
plugins.push(await resolveTsPlugin())
}

if (!ssr && !needHmr) {
Expand Down
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