Search by extra lookup fields

Hello!
I need to search via extra lookup fields.
For example I have lookup field Contractor, which references to the field Title of the Contractor list. I want to show extra fields (contractor address, email etc) and search via them. There is documentation how to show extra fields but I didn’t find anything about searching. Is it possible? How it should be realized?
Thanks

Found the answer here https://plumsail.com/docs/forms-sp/javascript/fields-sp.html#lookup-lookupmulti, “filter” section.

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