You'll need to expose some sort of API that your JavaScript can use to request data from your Craft install.

There are two first-party options:

1. Craft CMS has had GraphQL support built into core since version 3.3.0. The official docs provides a fairly comprehensive guide to get up and running.

2. If you prefer a RESTful API, the first-party Element API plugin provides a simple interface to configure your endpoints. The documentation for Element API can be found on the plugin's GitHub page. The Element API plugin is available for both Craft 3 and 4.

Aside from the above, if you happen to use Gatsby for your site there's also a first-party Gatsby source plugin for Craft.

Finally, when using Craft as a CMS for a headless app/site, it's also worth knowing about the headlessMode, which "optimizes the system and control panel for headless CMS implementations".

You'll need to expose some sort of API that your JavaScript can use to request data from your Craft install.

There are two first-party options:

1. Craft CMS has had GraphQL support built into core since version 3.3.0. The official docs provides a fairly comprehensive guide to get up and running.

2. If you prefer a RESTful JSON API, the first-party Element API plugin provides a simple interface to configure your endpoints. The documentation for Element API can be found on the plugin's GitHub page. The Element API plugin is available for both Craft 3 and 4.

Aside from the above, if you happen to use Gatsby for your site there's also a first-party Gatsby source plugin for Craft.

Finally, when using Craft as a CMS for a headless app/site, it's also worth knowing about the headlessMode, which "optimizes the system and control panel for headless CMS implementations".

You'll need to expose some sort of API that your JavaScript can use to request data from your Craft install.

There are two first-party options:

1. Craft CMS has GraphQL support built into core. The official docs provides a fairly comprehensive guide to get up and running.

2. If you prefer a RESTful API, the first-party Element API plugin provides a simple interface to configure your endpoints. The documentation for Element API can be found on the plugin's GitHub page.

Aside from that, if you happen to use Gatsby for your site there's also a first-party Gatsby source plugin for Craft.

Finally, when using Craft as a CMS for a headless app/site, it's also worth knowing about the headlessMode, which "optimizes the system and control panel for headless CMS implementations".

You'll need to expose some sort of API that your JavaScript can use to request data from your Craft install.

There are two first-party options:

1. Craft CMS has had GraphQL support built into core since version 3.3.0. The official docs provides a fairly comprehensive guide to get up and running.

2. If you prefer a RESTful API, the first-party Element API plugin provides a simple interface to configure your endpoints. The documentation for Element API can be found on the plugin's GitHub page. The Element API plugin is available for both Craft 3 and 4.

Aside from the above, if you happen to use Gatsby for your site there's also a first-party Gatsby source plugin for Craft.

Finally, when using Craft as a CMS for a headless app/site, it's also worth knowing about the headlessMode, which "optimizes the system and control panel for headless CMS implementations".