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@Caged /d3-server.js
Last active Feb 26, 2017

Directly render and serve d3 visualizations from a nodejs server.
// Start `node d3-server.js`
// Then visit http://localhost:1337/
//
var d3 = require('d3'),
http = require('http')
http.createServer(function (req, res) {
// Chrome automatically sends a requests for favicons
// Looks like https://code.google.com/p/chromium/issues/detail?id=39402 isn't
// fixed or this is a regression.
if(req.url.indexOf('favicon.ico') != -1) {
res.statusCode = 404
return
}
var pad = { t: 10, r: 10, b: 50, l: 40 },
width = 800 - pad.l - pad.r,
height = 500 - pad.t - pad.b,
samples = d3.range(10).map(d3.random.normal(10, 5)),
x = d3.scale.linear().domain([0, samples.length - 1]).range([0, width]),
y = d3.scale.linear().domain([0, d3.max(samples)]).range([height, 0]),
xAxis = d3.svg.axis().scale(x).orient('bottom').tickSize(height),
yAxis = d3.svg.axis().scale(y).orient('left')
var line = d3.svg.line()
.interpolate('basis')
.x(function(d, i) { return x(i) })
.y(y)
var vis = d3.select('body').html('').append('svg')
.attr('xmlns', 'http://www.w3.org/2000/svg')
.attr('xmlns:xlink', 'http://www.w3.org/1999/xlink')
.attr('width', width + pad.l + pad.r)
.attr('height', height + pad.t + pad.b)
.append('g')
.attr('transform', 'translate(' + pad.l + ',' + pad.t + ')')
vis.append('g')
.attr('class', 'x axis')
.call(xAxis)
vis.append('g')
.attr('class', 'y axis')
.call(yAxis)
vis.selectAll('.axis text')
.style('fill', '#888')
.style('font-family', 'Helvetica Neue')
.style('font-size', 11)
vis.selectAll('.axis line')
.style('stroke', '#eee')
.style('stroke-width', 1)
vis.selectAll('.domain')
.style('display', 'none')
vis.selectAll('path.samples')
.data([samples])
.enter().append('path')
.attr('class', 'samples')
.attr('d', line)
.style('fill', 'none')
.style('stroke', '#c00')
.style('stroke-width', 2)
res.writeHead(200, {'Content-Type': 'image/svg+xml'})
res.end(d3.select('body').node().innerHTML)
}).listen(1337, '127.0.0.1')
console.log('Server running at http://127.0.0.1:1337/');
@raees
raees commented Aug 17, 2015

Hi,

I tried your code but it shows the following error message:
TypeError: Cannot read property 'querySelector' of undefined

Can you please tell me where is the problem or any solution?

@mattbullen

Same question!

@edgar-humberto

Same here same error. Anyone have the answer to this?

@mhebrard
mhebrard commented Oct 1, 2015

Maybe i miss something, but in my tests, the problem is :
on server side, there is no DOM. so d3.selection cannot find objects.

I still don't know the trick to use d3 in server side.

@micheledisalvatore

here you can find an implementation of this example that works https://github.com/Objectway/d3-server-renderer

@ubear
ubear commented Oct 30, 2015

This simple project works using d3 and node.js, and it will render to png image:https://github.com/ubear/hegel

@dotob
dotob commented Jan 6, 2016

hi, i got it to work with jsdom: https://gist.github.com/dotob/37b80cbbd9f0e1f135db (sorry its coffeescript now...)

@wboykinm
wboykinm commented Jun 6, 2016

Here's a vanilla-JS implementation using jsdom (which is the first of all of the possible methods that I've actually gotten to work).

@bradoyler

Try using D3-Node

@plouc
plouc commented Oct 1, 2016 edited

You can try nivo, it's a set of d3 powered React components, it doesn't use d3 for DOM manipulation, so it's easy to render it on the server side without using jsdom or headless browser rendering, it also provide an http API.

For now those libraries are under heavy development.

An example of a pack layout

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