Inject package version before npm publish to reduce a bundle size

.circleci/config.yml

@@ -109,6 +109,8 @@ commands:
           name: Yarn Install
           command: |
             yarn install --frozen-lockfile --no-progress --non-interactive --cache-folder ~/.cache/yarn
+            cd ~/react-native-url-polyfill && yarn prepublishOnly
+
   install-detox:
     steps:
       - restore-cache-detox-env

index.js

@@ -1,12 +1,10 @@
 import './js/ios10Fix';
 
-import packageJson from './package.json';
-
 export * from './js/URL';
 export * from './js/URLSearchParams';
 
 export function setupURLPolyfill() {
-  globalThis.REACT_NATIVE_URL_POLYFILL = `${packageJson.name}@${packageJson.version}`;
+  globalThis.REACT_NATIVE_URL_POLYFILL = '<INJECT_VERSION>';
 
   globalThis.URL = require('./js/URL').URL;
   globalThis.URLSearchParams = require('./js/URLSearchParams').URLSearchParams;

package.json

@@ -25,6 +25,7 @@
     "lint": "eslint .",
     "type-check": "tsc index.d.ts",
     "prepare": "husky install",
+    "prepublishOnly": "node scripts/prepublish",
     "bundle-size": "node scripts/bundle-size"
   },
   "author": "Nicolas Charpentier <[email protected]>",

scripts/prepublish.js

@@ -0,0 +1,12 @@
+#!/usr/bin/node
+const fs = require('node:fs');
+
+const packageJson = require('../package.json');
+const path = require.resolve('../index.js');
+
+fs.writeFileSync(
+  path,
+  fs
+    .readFileSync(path, 'utf8')
+    .replace('<INJECT_VERSION>', `${packageJson.name}@${packageJson.version}`),
+);