Original post written by Juan Cruz Martinez for Auth0 blog.
Let's explore the main features of the new Auth0 SDK for SPA release.
The Auth0 team released the new Auth0 Single Page App SDK v2.0, and it's now available in the npm registry. It is a major new release with a focus on development and user experience.
The new release makes an important step towards improving usability and reducing the footprint (size) of the SDK.
Quick Start with the New SDK
You can follow the quick start guide if you build a new application or connect your SPA with Auth0 using the SDK for the first time.
If you use frameworks such as React, Angular, or Vue, you can use framework-specific libraries instead. You can learn more about specific frameworks in our SPA guides section.
All of the mentioned improvements will be available in the next beta versions of our framework-specific SDKs. Be sure to keep an eye on them to be notified when their beta versions are available.
Migrating from v1.x
With the improvements from v1.x, it was necessary to introduce some breaking changes. We will cover the most impactful changes in this post, but we recommend reviewing the migration guide for the details of all breaking changes and their corresponding migration path.
Reduced Bundle Size by 60%
Auth0 SPA SDK V1.x shipped with built-in polyfills to compensate for the lack of native support on some browsers for features such as:
As the above APIs are now available for most browsers, we believe there's no more need to include those polyfills. Primarily users of IE11 would require them, and with Microsoft dropping support for IE11, we believe it makes sense to capitalize on the gains and drop support for IE11 as of V2.
By removing these polyfills, and with some small improvements on our side, we reduced the bundle size by an outstanding 60%.
Such a reduction will allow for faster download and processing times for application users.
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