Starting with version 1.9.0, a minified browser bundle can be obtained from npm CDNs such as unpkg or jsDelivr. The link can be found in the README.md.
In prior versions, the browser bundles were made available in the dist directory. In order to access those, look in the dist folder on the version's GitHub tag, e.g. https://github.com/algorand/js-algorand-sdk/tree/v1.8.1/dist.
Yes! If you would instead prefer to host the package yourself, a minified browser bundle can be found in the dist/browser/ folder of the published npm package starting with version 1.9.0.