show a message on postinstall

CHANGELOG.md

@@ -2,6 +2,7 @@
 ##### 2.6.6 [LEGACY]
 - Fixed IE8- non-enumerable properties support in `Object.{ assign, entries, values }`, [#541](https://github.com/zloirock/core-js/issues/541)
 - Fixed support of primitives in `Object.getOwnPropertySymbols` in Chrome 38 / 39, [#539](https://github.com/zloirock/core-js/issues/539)
+- Show a message on `postinstall`
 
 ##### 2.6.5 - 2019.02.15
 - Fixed buggy `String#padStart` and `String#padEnd` mobile Safari implementations, [#414](https://github.com/zloirock/core-js/issues/414).

package.json

@@ -37,7 +37,8 @@
     "lint": "eslint ./",
     "promises-tests": "promises-aplus-tests tests/promises-aplus/adapter",
     "observables-tests": "node tests/observables/adapter && node tests/observables/adapter-library",
-    "test": "npm run grunt clean copy && npm run lint && npm run grunt livescript client karma:default && npm run grunt library karma:library && npm run promises-tests && npm run observables-tests && lsc tests/commonjs"
+    "test": "npm run grunt clean copy && npm run lint && npm run grunt livescript client karma:default && npm run grunt library karma:library && npm run promises-tests && npm run observables-tests && lsc tests/commonjs",
+    "postinstall": "node scripts/postinstall"
   },
   "license": "MIT",
   "keywords": [

scripts/postinstall.js

@@ -0,0 +1,12 @@
+/* eslint-disable no-console,max-len */
+var env = process.env;
+var CI = !!env.CI && env.CI !== '0' && env.CI !== 'false';
+var SILENT = !!~['silent', 'error', 'warn'].indexOf(env.npm_config_loglevel);
+
+if (!CI && !SILENT) {
+  console.log('\u001B[96mThank you for using core-js (\u001B[94mhttps://github.com/zloirock/core-js\u001B[96m)!\u001B[0m\n');
+  console.log('\u001B[96mPlease consider supporting of core-js on Open Collective or Patreon:\u001B[0m');
+  console.log('\u001B[96m> \u001B[94mhttps://opencollective.com/core-js\u001B[0m');
+  console.log('\u001B[96m> \u001B[94mhttps://www.patreon.com/zloirock\u001B[0m\n');
+  console.log('\u001B[96mAlso, the author of core-js (\u001B[94mhttps://github.com/zloirock\u001B[96m) is looking for a good job -)\u001B[0m\n');
+}