Mermir is a tool that allows you to launch complex workflows in npm using the MermaidJS flowcharts. It allows your to use all power of modern diagraming tool in order to describe and launch complex workflows.

npm i mermir

First, you should create a MermaidJS diagram file at the root of your project named mermir.mermaid. Then you must use flowchart syntax to describe connections of your npm tasks. Consider your package.json has three scripts: build:js, build:styles and deploy. For example, you want to launch build:styles and build:js in parallel, and the launch deploy. Then you can fill your mermir.mermaid file in following way:

flowchart
build:js-->deploy
build:styles-->deploy

And then run in the comand line

npx mermir run

Or set the script in your package.json:

"workflow": "memir run"