Blueprint for base html

Hi,

I wanted to make a blueprint that will allow content editors to be able to add items in the base html twig. such as google analytics tracking codes but can't see away to do it. I have tried using the default.yaml which lets me add custom items on the home page but not within the base. Any ideas?

Are you trying to do this from a theme? Or from a plugin? If from a theme, the best way is to create an option in your theme configuration and in your theme use that option with {{ config.themes.mytheme.analytics_id }}