Position of the matched text in an Index

Is there an option to retrieve the position of the searched text in a given string that flexsearch matches? would be super useful to generate a preview of the content.

Let us say there are two strings in the index 1: Lorem Ipsum is simply dummy text of the printing and typesetting industry. 2. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old.

If I search using flexsearch for query printing it will return string 1.

now, with the returned index id, I also want to show a preview (+ or - 4 words from the matched text) - example: text of the printing and typesetting industry. Is there a way to do this?

[haikyuu]

First of all, thanks for this amazing library. That’s some great engineering work.

This is actually not supported. It could be provided by a future plugin. Also you can try to solve this manually. After getting back the result from indexed documents you need to find the first occurrence of the given query.

That defeats the point of the library. If I had to implement the exact algorithm used to perform search, I wouldn’t use the library in the first place.

A good enough solution is to return just the index of the (first letter of the) occurrence in the string.

a future plugin

Is there an API for adding plugins? any examples?

[bobvanderlinden]

I’m currently doing a regex lookup on the resulting documents for words in the query. First split the query by to get the words in the query. Create a regex that includes all of these words, by joining them using |. Then find all matches in the found document. Using those matches and their index and length I can highlight those findings. It doesn’t support fuzzy matching.

One implementation can be found here: https://github.com/verwijsafspraken/verwijsafspraken/blob/5fe4da30f8dbac922c8da44b4eff712a9d2e6971/src/search.js#L86