Q:

How to serve Google Big Query output to a client web

I have exported Firestore collections to Google Big Query to make data analysis and aggregation.
What is the best practice (using Google Cloud Products) to serve Big Query outputs to a client web application? 

A:

Google provides seven client libraries for BigQuery. You can take any library and write a webserver that will serve requests from client web application. The webserver can use a GCP service account to access BigQuery on behalf of its clients. 
One such sample is this project. It's written in TypeScript. Uses NodeJS library on the server and React for the client app. I'm the author.

