Send email with custom html template

Hi,
How do can I send custom email template(html) using CI 4 email class?!

Thanks for any help

Natively CI4 does not do any template handling, you construct your own message body as a string and send it. You could do this with Views and the View parser, or a third party package. Check out https://github.com/tattersoftware/codeigniter4-outbox