fix: Fix jest usage with mocks (#3691)

Author: ntucker

.changeset/fix-mock-cjs-exports.md

@@ -0,0 +1,8 @@
+---
+"@data-client/core": patch
+"@data-client/react": patch
+---
+
+Fix CommonJS compatibility for `/mock` subpath exports.
+
+Jest and other CommonJS consumers can now import from `@data-client/react/mock` and `@data-client/core/mock` without ESM parsing errors.

packages/core/package.json

@@ -56,6 +56,7 @@
     },
     "./mock": {
       "types": "./lib/mock/index.d.ts",
+      "require": "./dist/mock.js",
       "default": "./lib/mock/index.js"
     },
     "./package.json": "./package.json"

packages/core/rollup.config.mjs

@@ -58,6 +58,7 @@ if (process.env.BROWSERSLIST_ENV !== 'node12') {
   [
     { input: 'src/index.ts', output: pkg.main },
     { input: 'src/next/index.ts', output: 'dist/next.js' },
+    { input: 'src/mock/index.ts', output: 'dist/mock.js' },
   ].forEach(({ input, output }) => {
     configs.push({
       input,

packages/react/package.json

@@ -140,6 +140,7 @@
     },
     "./mock": {
       "types": "./lib/mock/index.d.ts",
+      "require": "./dist/mock.js",
       "default": "./lib/mock/index.js"
     },
     "./package.json": "./package.json"

packages/react/rollup.config.mjs

@@ -99,6 +99,7 @@ if (process.env.BROWSERSLIST_ENV !== 'node12') {
       input: 'src/server/redux/index.ts',
       output: 'dist/server/redux/index.js',
     },
+    { input: 'src/mock/index.ts', output: 'dist/mock.js' },
   ].forEach(({ input, output }) => {
     configs.push({
       input,