Webpack build error

Very odd but looks like a js file is importing it’s ts version and causing an error, this is probably an issue in my build system.

 ERROR in ./node_modules/apollo-cache-inmemory/src/optimism.ts 1:8
[0] Module parse failed: Unexpected token (1:8)
[0] You may need an appropriate loader to handle this file type.
[0] > declare function require(id: string): any;
[0] | 
[0] | export type OptimisticWrapperFunction<
[0]  @ ./node_modules/apollo-cache-inmemory/lib/optimism.js 1:11-30
[0]  @ ./node_modules/apollo-cache-inmemory/lib/inMemoryCache.js
[0]  @ ./node_modules/apollo-cache-inmemory/lib/index.js
[0]  @ ./node_modules/apollo-boost/lib/index.js
[0]  @ ./src/apolloClient.ts
[0]  @ ./src/_client.tsx

_Originally posted by @rlancer in https://github.com/apollographql/apollo-client/issues/3980#issuecomment-428316959_

[williamboman]

Issue was in my webpack config

  resolve: {
    modules: ['src', 'node_modules'],

I removed ‘src’ and it all worked

resolve: {
    modules: [ 'node_modules'],

If you want to have the former configuration you need to pass an absolute path to your src/ directory, e.g.:

   resolve: {
      modules: [path.resolve(__dirname, 'src'), 'node_modules'],

[rlancer]

Issue was in my webpack config

  resolve: {
    modules: ['src', 'node_modules'],

I removed ‘src’ and it all worked

resolve: {
    modules: [ 'node_modules'],