supabase-client

An alternative TypeScript-based Supabase client.

This package is an alternative to the official @supabase/supabase-js client, with the intention of experiment with better TypeScript type definitions. In the future, this package might also contain other experiments such as a more tree-shaking-friendly API, and other UX/DX improvements, with the hope that they might eventually be upstreamed into @supabase/supabase-js v2.

Features

• Use of template literals types to construct return type definitions of your queries, without having to manually specify them:

  // Before:
  // Instead of having to specify the query and the definition:
  
  type WorkspaceWithTeam =
    definition["workspaces"] & {
      team: {
        user: Pick<definition["users"], "id" | "email">;
      };
    };
  
  supabase
    .from<WorkspaceWithTeam>("workspaces")
    .select(`
      *,
      team:members(
        user:users(
          id,
          email
        )
      )
    `);
  
  // After:
  // Just specify the query once!
  supabase
    .from("workspaces")
    .select(`
      *,
      team:members(
        user:users(
          id,
          email
        )
      )
    `);

• Type-checking of your select(query) format

• IntelliSense suggestions of fields in filter conditions:

  supabase
    .from("workspaces")
    .select(`
      name,
      id,
      team:members(
        user:users(
          id,
          email
        )
      )
    `)
    .filter("|", "eq", X);
    // Provides auto-complete suggestions of "name" | "id" | "team.user.id" | "team.user.email"

Usage

Install using npm or yarn:

npm i @supabase/supabase-js 
npm i --D @bnjmnt4n/supbase-client

For now, this package only provides alternative types for the @supabase/supabase-js client. TypeScript v4.5.0+ is required.

import { createClient } from "@supabase/supabase-js";
import { type SupabaseClient } from "@bnjmnt4n/supabase-client";

// Type-definitions for each table in your schema. See 
import { definitions } from "lib/__generated__/supabase.ts";

const supabase = createClient(SUPABASE_URL, SUPABASE_KEY, OPTIONS)
  as unknown as SupabaseClient<definitions>;

const { data, error } = await supabase
  .from("users")
  .select(`
    email,
    name,
    products(
      id,
      name
    )
  `)
  .maybeSingle();

if (data) {
  data.name;
  data.email;

  if ("length" in data.products) {
    // Array of products.
    data.products[0].id;
  } else {
    // Single products.
    data.products.id;
  }
}

Bugs/Issues?

If there are any issues with the types, you can simply cast the client back to the original type definitions:

import { type SupabaseClient } from "@supabase/supabase-js";

(supabase as unknown as SupabaseClient).from("").select();

Do report any bugs though!