createdynamiclink.js

const link = 
  new firebase.links.DynamicLink('https://example.com?param1=foo&param2=bar', 'abc123.page.link')
    .android.setPackageName('com.example.android')
    .ios.setBundleId('com.example.ios');

firebase.links()
    .createDynamicLink(link)
    .then((url) => {
      // ...
    });