Do we have the import.meta.env.SSR

[nhattran998]

Thank teams for the great tools <3.

After reading the docs - https://rsbuild.dev/guide/advanced/env-vars and https://rsbuild.dev/guide/advanced/ssr, I don't see any place disscuss about this. So, how can I do this with RsBuild 🙏.

[chenjiahan]

Rsbuild injects the following environment variables by default:

• import.meta.env.MODE
• import.meta.env.BASE_URL
• import.meta.env.PROD
• import.meta.env.DEV

For import.meta.env.SSR, you can set it through the environments configuration option:

export default defineConfig({
  environments: {
    web: {
      source: {
        define: {
          'import.meta.env.SSR': false,
        },
      },
    },
    node: {
      source: {
        define: {
          'import.meta.env.SSR': true,
        },
      },
      output: {
        target: 'node',
      },
    },
  },
});

[nhattran998]

Thank for your quick response 🙏

[SoonIter]

Update: import.meta.env.SSR is now supported as a built-in Rsbuild env value since v2.0.7, via #7700 (merged on 2026-05-20).

It is true for Node target builds and false for other targets, so after upgrading to v2.0.7 or later, you no longer need to manually define import.meta.env.SSR through source.define for the common web/node setup.