When we use a GraphQL API there are two kinds of errors we may encounter: Network Errors and GraphQL Errors from the API. Since it's common to encounter either of them, there's a CombinedError class that can hold and abstract either.

Components are the core of MJML. A component is an abstraction of a more complex email-responsive HTML layout. It exposes attributes, enabling you to interact with the final component visual aspect.

MJML has been designed with responsiveness in mind. The abstraction it offers guarantee you to always be up-to-date with the industry practices and responsive. Email clients update their specs and requirements regularly, but we geek about that stuff - we’ll stay on top of it so you can spend less time reading up on latest email client updates and more time designing beautiful email.

While you could nest an activity into another manually, the Subprocess macro will come in handy.

The Track() function will snap the output to the next task that is “magnetic to” the track’s semantic.

While you could program this little piece of logic and flow yourself using a bunch of Ruby methods along with a considerable amount of ifs and elses, and maybe elsif, if you’re feeling fancy, a Trailblazer activity provides you a simple API for creating such flow without having to write and maintain any control code. It is an abstraction.