also consider zone.js/browser and zone.js/node. you can expose js and d.ts files at the root to require dist/

./node.js

require('dist/zone-node.js');

./node.d.ts

import 'dist/zone';

./browser.js

require('dist/zone.js');

./browser.d.ts

import 'dist/zone';

then you can also do zone.js/browser and zone.js/node with types