How to delete record from Firebase by specific field?

Question

firebase

There is a database structure:

I want to delete everything

records

, by categoryId. I want code like this:

import firebase from "firebase/app"

        async deleteCategory({dispatch, commit}, cat_id) {
                const uid = await dispatch('getUid') // получаю конкретного пользователя
                await firebase.database().ref(`users/${uid}/records`).WHERE('categoryId' === cat_id)
        }

But firebase doesn't

where()

and even nothing like that, how to be?