Hi, it's Alex from DocuSeal.
Recently we released a new embedded JS api for document signing at DocuSeal.
Instead of doing it via iframe we decided to provide a JS-based solution.
Here are some benefits over iframe:
- faster load speed
- easy to customize
- optimized on different screen sizes
Also there is a React components library which also works with SSR Next.js https://github.com/docusealco/docuseal-react
Looking for some feedback and would be happy to answer any questions.