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An isomorphic JavaScript client for Supabase.


First of all, you need to install the library:

npm install @supabase/supabase-js

Then you're able to import the library and establish the connection with the database:

import { createClient } from '@supabase/supabase-js'

// Create a single supabase client for interacting with your database
const supabase = createClient('', 'public-anon-key')


You can now use plain <script>s to import supabase-js from CDNs, like:

<script src=""></script>

or even:

<script src=""></script>

Then you can use it from a global supabase variable:

  const { createClient } = supabase
  const _supabase = createClient('', 'public-anon-key')

  console.log('Supabase Instance: ', _supabase)
  // ...


You can now use type="module" <script>s to import supabase-js from CDNs, like:

<script type="module">
  import { createClient } from ''
  const supabase = createClient('', 'public-anon-key')

  console.log('Supabase Instance: ', supabase)
  // ...

Custom fetch implementation

supabase-js uses the cross-fetch library to make HTTP requests, but an alternative fetch implementation can be provided as an option. This is most useful in environments where cross-fetch is not compatible, for instance Cloudflare Workers:

import { createClient } from '@supabase/supabase-js'

// Provide a custom `fetch` implementation as an option
const supabase = createClient('', 'public-anon-key', {
  global: {
    fetch: (...args) => fetch(...args),


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