How to Install Mermaid on nixOS Latest

Mermaid is a JavaScript library that allows you to create diagrams and flowcharts using a simple text-based syntax. In this tutorial, we will go through the steps to install Mermaid library on nixOS latest.

Prerequisites

A system running nixOS Latest
Internet access

Step 1: Open Terminal

Open a terminal by clicking on the terminal icon or by pressing CTRL + ALT + T.

Step 2: Install Mermaid

Run the following command to activate nix-shell:
```
nix-shell -p nodejs
```
Once you are in the nix-shell environment, run the following command to install Mermaid:
```
npm install mermaid
```
Wait for the installation to complete. If successful, you should see output similar to the following:
```
added 41 packages from 28 contributors in 7.041s
```

Step 3: Test Mermaid Installation

Create a new file named test.html in your preferred text editor.

Paste the following code into the file:

<!DOCTYPE html>
<html>
<head>
    <title>Test Mermaid Installation</title>
    <script src="./node_modules/mermaid/dist/mermaid.min.js"></script>
</head>
<body>
    <div class="mermaid">
    graph TD;
    A-->B;
    A-->C;
    B-->D;
    C-->D;
    </div>
    <script>mermaid.initialize({startOnLoad:true});</script>
</body>
</html>

Save the file and close your text editor.
Run the following command in your terminal to start a local web server:
```
python -m http.server
```
Open your web browser and navigate to http://localhost:8000/test.html.
If everything is working correctly, you should see a diagram displayed in your web browser.

Conclusion

Congratulations! You have successfully installed Mermaid on nixOS Latest and created a basic diagram using the library. You can now use Mermaid to create more complex diagrams and flowcharts for your projects.