> ## Documentation Index > Fetch the complete documentation index at: https://docs.connect.fastenhealth.com/llms.txt > Use this file to discover all available pages before exploring further. # Quickstart > Install and render the `` inside any web runtime. This documentation is for [Stitch.js (v4) SDK](/stitch/v4/), which is now the recommended version for integrating Fasten Connect into your application. If you need access to the previous versions, please see [v1 documentation](/stitch/v1/) or [v3 documentation](/stitch/v3/). This version includes compatibility with additional runtime environments (Web, React Native, React etc), improved performance, and additional features. v4 is backwards compatible with v3 -- there are no breaking changes to the public API, but we have made significant improvements to the underlying codebase and architecture. If you are currently using v3, you can upgrade to v4 without making any changes to your code. The [v1 Web Component](/stitch/v1/) and [v3 Web Component](/stitch/v3) are in maintenance mode and will no longer receive updates (outside of security fixes). Please update your code to use the new version.

## Installation ```md stitch.js theme={null}

``` ## Installation (TEFCA Mode) When TEFCA mode is enabled, developers can access medical records without requiring the patient to search for their healthcare providers, or login to multiple portal logins. Instead the patient is prompted to verify their identity and Fasten Connect will automatically retrieve their medical records from any healthcare institution that participates in the TEFCA network.

If you would like to enable TEFCA IAS mode, you can do so by adding the `tefca-mode="true"` attribute to the `` tag. The remaining installation steps are the same as above, just with the additional attribute. This is intentionally designed to be as simple as possible to get started with TEFCA IAS. ```md stitch.js theme={null}

```