#SEQUENCE DIAGRAM IF STATEMENT SOFTWARE#
#SEQUENCE DIAGRAM IF STATEMENT PROFESSIONAL#

Capture the flow of information and responsibility throughout the system, early in analysis Messages between elements eventually become method calls in the Class model.

Depict workflow, Message passing and how elements in general cooperate over time to achieve a result.

#SEQUENCE DIAGRAM IF STATEMENT SOFTWARE#

If you'd like to learn more and see a few features I didn't cover, I recommend you check out Mermaid.js' sequence diagram documentation.Īnd finally, I'm not done exploring what modern software engineers can do with Mermaid.js so stay tuned for more content! Mermaid.A Sequence diagram is a structured representation of behavior as a series of sequential steps over time. Ultimately, I think Mermaid.js Sequence Diagrams are a good strategic tool for diagramming complex interactions or communicating complex concepts in a visual way in your documentation.

Personally, I find Mermaid.js diagrams so convenient to use that I now find myself making sequence diagrams where I normally wouldn't have before due to the time and frustration required to build one. While sequence diagrams aren't necessarily beginner friendly, working with Mermaid.js sequence diagrams is exponentially less painful than trying to control a diagramming tool to generate and maintain these diagrams. Ultimately, I don't think I like this shorthand and instead prefer to use the activate / deactivate syntax for more readable sequence diagrams, but the option is there for you if you want it.

Let's start with a simple sequence diagram representing a message from the client to the server and the server's response back.Įnter fullscreen mode Exit fullscreen mode If you're curious about this, however, I do have an article and video on understanding JWT authentication. However, the focus of the article's text will be on the diagrams themselves, not the process of JWT authentication. Over the course of this article, we'll create and expand a sequence diagram to explain JSON Web Token (JWT) authentication. If you're curious about sequence diagrams in general, a good starting point might be Visual Paradigm's Guide to Sequence Diagrams. This can help explain complex logic and interactions with a technical diagram and identify areas of confusion or misunderstanding. Sequence diagrams represent systems and individuals as vertical columns and messages between these parts as horizontal lines that move across the various lanes to show how data flows between different pieces of the system. Mermaid.js is available in a variety of tools, but I most frequently use it in GitHub markdown files and in Polyglot Notebooks.įor those of you who haven't been exposed, sequence diagrams describe a series of messages in a sequence between different objects. It also means that the diagram source is easily version-controlled and anyone on your team can modify it without special tooling or licenses. This means your time is focused on actually writing the interaction logic instead of generating a visual.

#SEQUENCE DIAGRAM IF STATEMENT PROFESSIONAL#

With Mermaid.js you can write a few lines of text and use its JavaScript library to generate a professional sequence diagram like the one below: Mermaid.js is the solution I needed 20 years ago. I distinctly remember working on sequence diagrams in my undergraduate computer science education and having so many issues trying to get the various boxes and arrows to look standard, rearrange shapes as I needed to expand the diagram, and generally focusing on anything but the logic the diagrams intended to create. Previously I've shown how Mermaid.js allows you to create entity relationship diagrams and class diagrams, but in this article we'll cover a far more complex diagram: the sequence diagram.

I've been really enjoying seeing how Mermaid.js lets you generate technical diagrams from simple markdown.

Sequence diagram if statement