javascript - Generate charts without HTMLBrowser - Stack Overflow

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I have a node.js application that accesses data of a MySQL database and I want to generate charts from that data dynamically, to pipe it as image (PNG/JPG) through a HTTP server to the user. I've search for a little while now, but I was unable to find a library to do this without the HTML/canvas approach. Since I want to let the server do the rendering to use the graph in emails or also dynamically rendered PDF files, this isn't an option here.

What could be the approach here (with or without a library) ?

Edit to provide proof of own work: I found , which is in terms of usage and result really close to fulfil my needs, but requires an internet connection, since it calls a remote API.

I have a node.js application that accesses data of a MySQL database and I want to generate charts from that data dynamically, to pipe it as image (PNG/JPG) through a HTTP server to the user. I've search for a little while now, but I was unable to find a library to do this without the HTML/canvas approach. Since I want to let the server do the rendering to use the graph in emails or also dynamically rendered PDF files, this isn't an option here.

What could be the approach here (with or without a library) ?

Edit to provide proof of own work: I found https://plot.ly, which is in terms of usage and result really close to fulfil my needs, but requires an internet connection, since it calls a remote API.

• javascript
• node.js
• charts

Share Follow edited Jan 18, 2016 at 12:28 XQDev asked Jan 18, 2016 at 12:05 XQDevXQDev 36655 silver badges1515 bronze badges 12

• Clearly off topic (read How to Ask). why would anyone upvote this? – Amit Commented Jan 18, 2016 at 12:10
• I edited the question to make it more obvious to passing by users that this is a real question and not a request for a library. – Denys Séguret Commented Jan 18, 2016 at 12:10
• Why canvas isn't an option? You can render on canvas and get the image data to either send to the client or save on the server for later use in pdfs or whatever. – pawel Commented Jan 18, 2016 at 12:12
• 1 You could use python for chart rendering. take a look at this thread: stackoverflow./questions/10775351/… – Hauke S Commented Jan 18, 2016 at 12:17
• 1 You could try a chartist wrapper for node: github./panosoft/node-chartist – hansmaad Commented Jan 18, 2016 at 12:23

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3 Answers 3

Sorted by: Reset to default 9

You could also try asking this in the Software Recs Stack Overflow. But one option that seems like it could fit your needs is ZingChart.

They have a phantomJS build for rendering static versions of charts. In addition, licensed users can access a Node.js build for server side charting.

Full disclosure, I'm on the ZingChart team so please let me know if I can help you review all your options.

There is a node wrapper for the chart library chartist. You could use this library to generate a SVG, and a svg2png lib to convert to PNG.

Well there are multiple options, I would use phantomjs (headless Webkit browser) to render the charts.

Why would this option be good? One of the reasons is that you don't need duplicated code for the server and client side coding, you could simply reuse the code. On server side create a html file with required scripts and data and render it.

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