I have a node app running successfully on Heroku. I have purchased an Expedited SSL certificate and it all works fine. I go to https... and get a full \'green bar\' proving
If you are developing a creat-react-app and happened to use create-react-app-buildpack to deploy to Heroku (I'm lazy...)
creat-react-app
create-react-app-buildpack
You can specify the following in your static.json file
static.json
{ "https_only": true }
https://github.com/mars/create-react-app-buildpack#user-content-https-only