Module not found: Error: Can't resolve 'core-js/es6/array' angular code example

Example 1: Module not found: Error: Can't resolve 'core-js/modules/es6.object.create

solution install [email protected]

Example 2: Module not found: Error: Can't resolve 'core-js/es7/reflect'

// Change import in polyfills.ts
import 'core-js/es7/reflect';
// for
import 'core-js/es/reflect';