all good now.
I hadn't noticed that the header.tpl template had been changed here:
I want to develop a theme, how to edit the theme file then refresh the browser and see the change ?
Have you checked out the documentation on editing themes? https://docs.nodebb.org/development/themes/
Yes，I have read the documentation, the only way I can check the changes is restart the forum.
The easiest way is to use
grunt to automatically restart NodeBB when you've made a theme change:
I prefer nodemon
Yes well we have a gruntfile set up to already watch the correct directories and do the correct building steps. I don't think nodemon call do that for you.
you are right, I saw the grunt file and using the grunt