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auth0-spa-js

auth0-spa-js

Use when adding Auth0 login or token management to a Vanilla JS, Svelte, or framework-agnostic SPA. Integrates @auth0/auth0-spa-js — use when there is no framework-specific Auth0 SDK available.

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Updated 10/2/2026
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auth0-spa-js
description

Use when adding Auth0 login or token management to a Vanilla JS, Svelte, or framework-agnostic SPA. Integrates @auth0/auth0-spa-js — use when there is no framework-specific Auth0 SDK available.

Auth0 SPA JS Integration

Add authentication to any browser-based single-page application using @auth0/auth0-spa-js — the low-level Auth0 SDK for Vanilla JS, Svelte, SolidJS, and any SPA not using React, Angular, or Vue.

Agent instruction: Before providing SDK setup instructions, fetch the latest release version by running:

gh api repos/auth0/auth0-spa-js/releases/latest --jq '.tag_name'

Use the returned version in all dependency lines instead of any hardcoded version below. If the command fails, fall back to checking https://github.com/auth0/auth0-spa-js/releases.

Prerequisites

  • Modern browser with ES2017+ support

  • npm or yarn (or use CDN for no-bundler apps)

  • Auth0 account with a Single Page Application configured

  • If you don't have Auth0 set up, see auth0-quickstart

When NOT to Use