How to use mermaid on node.js restful api?

[robertrita]

I'm not an expert with javascript. Below is how I did it.
expected output: .svg or .png file that I can show on the response as full path.
Please help. thanks.

---

const express = require('express');
const mermaidAPI = require('mermaid');

app.get('/chart', (req, res) => {
mermaidAPI.initialize({
startOnLoad: true
})
const graphDefinition = 'graph TB\na-->b'
const cb = function(svgGraph) {
console.log(svgGraph)
}
mermaidAPI.render('id1',graphDefinition,cb)

res.status(200).json('.svg or .png file path here!');

})

[aimed]

You can use the mermaid.cli to create the image serverside, then serve it.
If you don't want to use the cli, look at how it uses a headless browser (puppeteer) to generate the files.

[tylerlong]

@aimed is correct. Please refer to https://github.com/mermaidjs/mermaid.cli