How to implement a visual editor in a framework?

Question

Frameworks

Greetings, I took a task to learn how to work with the vue js framework, a task for corporate needs to implement a service for creating email newsletters to clients.
But I have never come across visual editors, I looked at several ready-made services, they use the following:

Question, where can I look for such scripts and get acquainted with them?

Answer 1

took the task for training

here and learn. Incl. the ability to google.