how do I use startAt and endAt in firebase 9?

Question

I am new to firebase and want to use geo querying in my firestore db. the code examples in the docs use an older version of firebase, and I am having a hard time figuring out the equivalent to ".startAt" and ".endAt".

can someone quickly explain how it works in firebase 9?

Answer 1

The startAt() method includes the start point, while the endAt() methods to define an end point for your query results.

Sample code startAt() (Web v9):

import { query, orderBy, startAt } from "firebase/firestore";  

const q = query(citiesRef, orderBy("population"), startAt(1000000));

sample code 'endAt()' (Web v9):

import { query, orderBy, endAt } from "firebase/firestore";  

const q = query(citiesRef, orderBy("population"), endAt(1000000));

You may want to check this documentation about Paginate data with query cursors.

As mentioned by @Nicholas Tower you can check the other tabs for more examples (Web v9, Web v8, Swift, Obective-C, Java, etc).