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feat: add ssr.format to force esm output for ssr #6812

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merged 1 commit into from
May 29, 2022
+9 −2
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feat: add ssr.format to force esm output for ssr #6812

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5 changes: 3 additions & 2 deletions packages/vite/src/node/build.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -367,6 +367,7 @@ async function doBuild(
const config = await resolveConfig(inlineConfig, 'build', 'production')
const options = config.build
const ssr = !!options.ssr
const esm = config.ssr?.format === 'es' || !ssr
const libOptions = options.lib

config.logger.info(
Expand Down Expand Up @@ -464,8 +465,8 @@ async function doBuild(

return {
dir: outDir,
format: ssr ? 'cjs' : 'es',
exports: ssr ? 'named' : 'auto',
format: esm ? 'es' : 'cjs',
exports: esm ? 'auto' : 'named',
sourcemap: options.sourcemap,
name: libOptions ? libOptions.name : undefined,
entryFileNames: ssr
Expand Down
6 changes: 6 additions & 0 deletions packages/vite/src/node/config.ts
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Expand Up @@ -221,6 +221,12 @@ export interface SSROptions {
* Default: 'node'
*/
target?: SSRTarget

/**
* Define the module format for the ssr build.
* Default: 'cjs'
*/
format?: 'es' | 'cjs'
}

export interface ResolveWorkerOptions {
Expand Down