feat(core): optimize core package for node.js (#1530)

Author: kazupon

packages/core/README.md

@@ -37,10 +37,19 @@ The intlify core module for i18n
 ### For Node.js (Server-Side)
 
 - **`core.cjs(.prod).js`**:
+  - For CommonJS usage in Node.js
   - For use in Node.js via `require()`
   - If you bundle your app with webpack with `target: 'node'` and properly externalize `@intlify/core`, this is the build that will be loaded
   - The dev/prod files are pre-built, but the appropriate file is automatically required based on `process.env.NODE_ENV`
 
+- **`core.node.mjs`**:
+  - For ES Moudles usage in Node.js
+  - For use in Node.js via `import`
+  - The dev/prod files are pre-built, but the appropriate file is automatically required based on `process.env`<wbr/>`.NODE_ENV`
+
+> NOTE: ES Modules will be the future of the Node.js module system. The `core.cjs(.prod).js` will be deprecated in the future. We recommend you would use `core.node.mjs`. 9.3+
+
+
 ## :copyright: License
 
 [MIT](http://opensource.org/licenses/MIT)

packages/core/package.json

@@ -54,20 +54,20 @@
   "exports": {
     ".": {
       "types": "./dist/core.d.ts",
-      "import": "./dist/core.mjs",
-      "browser": "./dist/core.esm-browser.js",
       "node": {
         "import": {
-          "production": "./dist/core.prod.cjs",
-          "development": "./dist/core.mjs",
-          "default": "./dist/core.mjs"
+          "production": "./dist/core.prod.node.mjs",
+          "development": "./dist/core.node.mjs",
+          "default": "./dist/core.node.mjs"
         },
         "require": {
           "production": "./dist/core.prod.cjs",
           "development": "./dist/core.cjs",
           "default": "./index.js"
         }
-      }
+      },
+      "import": "./dist/core.mjs",
+      "browser": "./dist/core.esm-browser.js"
     },
     "./dist/*": "./dist/*",
     "./package.json": "./package.json"

rollup.config.mjs

@@ -274,22 +274,26 @@ function createConfig(format, _output, plugins = []) {
           console.log(`created stub ${pc.bold(`dist/${stub}`)}`)
 
           // add the node specific version
-          // NOTE:
-          //  https://github.com/vuejs/router/issues/1516
-          //  https://github.com/vuejs/router/commit/53f720622aa273e33c05517fa917cdcfbfba52bc
-          if (
-            format === 'mjs' &&
-            (name === 'vue-i18n' ||
-              name === 'vue-i18n-bridge' ||
-              name === 'petite-vue-i18n')
-          ) {
-            const outfile = `dist/${stub}`.replace('esm-bundler.js', 'node.mjs')
-            await fs.writeFile(
-              resolve(outfile),
-              `global.__VUE_PROD_DEVTOOLS__ = false;\n` + contents
-            )
-            console.log(`created stub ${pc.bold(outfile)}`)
-          }
+          if (format === 'mjs') {
+            // NOTE:
+            //  https://github.com/vuejs/router/issues/1516
+            //  https://github.com/vuejs/router/commit/53f720622aa273e33c05517fa917cdcfbfba52bc
+            if (name === 'vue-i18n' || name === 'vue-i18n-bridge' || name === 'petite-vue-i18n') {
+              const outfile = `dist/${stub}`.replace('esm-bundler.js', 'node.mjs')
+              await fs.writeFile(
+                resolve(outfile),
+                `global.__VUE_PROD_DEVTOOLS__ = false;\n` + contents
+              )
+              console.log(`created stub ${pc.bold(outfile)}`)
+            } else if(name === 'core') {
+              const outfile = `dist/${stub}`.replace('esm-bundler.js', 'node.mjs')
+              await fs.writeFile(
+                resolve(outfile),
+                `global.__VUE_PROD_DEVTOOLS__ = false;\nglobal.__INTLIFY_JIT_COMPILATION__ = true;\n` + contents
+              )
+              console.log(`created stub ${pc.bold(outfile)}`)
+            }
+          } 
         }
       }
     ],