Function renderChunk

packages/vite/src/node/plugins/esbuild.ts:394–423

(code, chunk, opts)

      return environment.config.esbuild !== false
    },
    async renderChunk(code, chunk, opts) {
      // avoid on legacy chunks since it produces legacy-unsafe code
      // e.g. rewriting object properties into shorthands
      if (this.environment.config.isOutputOptionsForLegacyChunks?.(opts)) {
        return null
      }

      const config = this.environment.config
      const options = resolveEsbuildTranspileOptions(config, opts.format)

      if (!options) {
        return null
      }

      const res = await transformWithEsbuild(
        code,
        chunk.fileName,
        options,
        undefined,
        config,
        undefined,
        true,
      )

      if (config.build.lib) {
        res.code = injectEsbuildHelpers(res.code, opts.format)
      }

      return res
    },
  }
}