67 replies

[1.4.0-beta.21] importing `better-auth/react-start` crashes `vite dev` on a cold build

🔌Plugin

hi! first of all, thanks for all the amazing work on this library :)

i was having issues doing a fresh build of my barebones tanstack start app. commenting out the

reactStartCookies

reactStartCookies

plugin seemed to fix it.

interestingly, the issue seems to be in the actual

better-auth/react-start

better-auth/react-start

module and not the plugin. any import of the module (that doesn't get removed by vite) causes a bunch of the following errors in the console:

Error: Error during dependency optimization:

✘ [ERROR] Could not resolve "#tanstack-router-entry"

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/dist/esm/createStartHandler.js:29:33:
      29 │       routerEntry = await import("#tanstack-router-entry");
         ╵                                  ~~~~~~~~~~~~~~~~~~~~~~~~

  The package import "#tanstack-router-entry" is not defined in this "imports" map:

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/package.json:49:13:
      49 │   "imports": {
         ╵              ^

  You can mark the path "#tanstack-router-entry" as external to exclude it from the bundle, which will remove this error and leave the unresolved path in the bundle. You can also add ".catch()" here to handle this failure at run-time instead of bundle-time.

Error: Error during dependency optimization:

✘ [ERROR] Could not resolve "#tanstack-router-entry"

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/dist/esm/createStartHandler.js:29:33:
      29 │       routerEntry = await import("#tanstack-router-entry");
         ╵                                  ~~~~~~~~~~~~~~~~~~~~~~~~

  The package import "#tanstack-router-entry" is not defined in this "imports" map:

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/package.json:49:13:
      49 │   "imports": {
         ╵              ^

  You can mark the path "#tanstack-router-entry" as external to exclude it from the bundle, which will remove this error and leave the unresolved path in the bundle. You can also add ".catch()" here to handle this failure at run-time instead of bundle-time.

the same error repeats for a few modules (

#tanstack-router-entry

#tanstack-router-entry

#tanstack-start-entry

#tanstack-start-entry

tanstack-start-manifest:v

tanstack-start-manifest:v

tanstack-start-injected-head-scripts:v

tanstack-start-injected-head-scripts:v

)

as far as i can tell, tanstack-start/tanstack-router throw these obtuse errors when you try to access client-only code in server code (or vice versa) in the body of a module during build time. so i suspect it's something related to that.

weirdly, it seems to happen only on a totally clean build. (i was deleting

node_modules

node_modules

and reinstalling before each run, but i think clearing the vite cache with e.g.

vite dev --force

vite dev --force

might work as well.) once i get a build working, if i comment the plugin back in, it usually works.

macOS Tahoe 26.1
nodejs 25.2.0
pnpm 10.22.0

sorry that's kind of a vague report. let me know if i can give any more info!

[1.4.0-beta.21] importing `better-auth/react-start` crashes `vite dev` on a cold build

🔌Plugin

hi! first of all, thanks for all the amazing work on this library :)

i was having issues doing a fresh build of my barebones tanstack start app. commenting out the

reactStartCookies

reactStartCookies

plugin seemed to fix it.

interestingly, the issue seems to be in the actual

better-auth/react-start

better-auth/react-start

module and not the plugin. any import of the module (that doesn't get removed by vite) causes a bunch of the following errors in the console:

Error: Error during dependency optimization:

✘ [ERROR] Could not resolve "#tanstack-router-entry"

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/dist/esm/createStartHandler.js:29:33:
      29 │       routerEntry = await import("#tanstack-router-entry");
         ╵                                  ~~~~~~~~~~~~~~~~~~~~~~~~

  The package import "#tanstack-router-entry" is not defined in this "imports" map:

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/package.json:49:13:
      49 │   "imports": {
         ╵              ^

  You can mark the path "#tanstack-router-entry" as external to exclude it from the bundle, which will remove this error and leave the unresolved path in the bundle. You can also add ".catch()" here to handle this failure at run-time instead of bundle-time.

Error: Error during dependency optimization:

✘ [ERROR] Could not resolve "#tanstack-router-entry"

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/dist/esm/createStartHandler.js:29:33:
      29 │       routerEntry = await import("#tanstack-router-entry");
         ╵                                  ~~~~~~~~~~~~~~~~~~~~~~~~

  The package import "#tanstack-router-entry" is not defined in this "imports" map:

    node_modules/.pnpm/@tanstack+start-server-core@1.136.8/node_modules/@tanstack/start-server-core/package.json:49:13:
      49 │   "imports": {
         ╵              ^

  You can mark the path "#tanstack-router-entry" as external to exclude it from the bundle, which will remove this error and leave the unresolved path in the bundle. You can also add ".catch()" here to handle this failure at run-time instead of bundle-time.

the same error repeats for a few modules (

#tanstack-router-entry

#tanstack-router-entry

#tanstack-start-entry

#tanstack-start-entry

tanstack-start-manifest:v

tanstack-start-manifest:v

tanstack-start-injected-head-scripts:v

tanstack-start-injected-head-scripts:v

node_modules

node_modules

and reinstalling before each run, but i think clearing the vite cache with e.g.

vite dev --force

vite dev --force

[1.4.0-beta.21] importing `better-auth/react-start` crashes `vite dev` on a cold build

[1.4.0-beta.21] importing `better-auth/react-start` crashes `vite dev` on a cold build

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