The Defintely Typed repository imports it like this:
import * as lunr from 'lunr';
However when using it like that in Stackblitz it errors with:
lunr is not a function
Thoughts? This is the Stackblitz:
Definitely Typed is using an older version of lunr, so I tried a different import: import lunr from "lunr", which throws an error saying posting[field] is undefined (source code).
I then noticed that the "text" field being used in the Builder was not initialized in the index. Adding this.field("text") in the index resulted in the page loading without errors.