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Given a jsdom based svgcreator.node.js script file :
var jsdom = require('jsdom');
jsdom.env(
"<html><body></body></html>", // CREATE DOM HOOK
[ 'http://d3js.org/d3.v3.min.js', // JS DEPENDENCIES online ...
'js/d3.v3.min.js' ], // ... & offline
// D3JS CODE * * * * * * * * * * * * * * * * * * * * * * * *
function (err, window) {
var svg = window.d3.select("body")
.append("svg")
.attr("width", 100)
.attr("height", 100);
svg.append("rect")
.attr("id", "rect1")
.attr("x", 10)
.attr("y", 10)
.attr("width", 80)
.attr("height", 80)
.style("fill", "green");
// END svg design
//PRINTING OUT SELECTION
console.log(window.d3.select("body").html());
}
// END (D3JS) * * * * * * * * * * * * * * * * * * * * * * * *
);
Given I use NodeJS terminal command to run it and generate a output.svg file :
node svgcreator.node.js > output.svg # nodeJS + script command
How to pass a parameter's value from the terminal to NodeJS ?
Dependencies for tests:
- svgcreator.node.js github repository:
git clone 'git@github.com:hugolpz/svgcreator.node.js.git' - jsdom required, use :
sudo npm install -g jsdom(global).
Solution used (@Matt_Harrison): we rely on process.env.myVar
svgcreator.node.js JS code :
var jsdom = require('jsdom');
jsdom.env(
"<html><body></body></html>", // CREATE DOM HOOK:
[ 'http://d3js.org/d3.v3.min.js', // JS DEPENDENCIES online ...
'js/d3.v3.min.js' ], // ... & offline
// D3JS CODE * * * * * * * * * * * * * * * * * * * * * * * *
function (err, window) {
var color = process.env.COLOR; // <<################# IMPORTANT !!
var svg = window.d3.select("body")
.append("svg")
.attr("width", 100)
.attr("height", 100);
svg.append("rect")
.attr("id", "rect1")
.attr("x", 10)
.attr("y", 10)
.attr("width", 80)
.attr("height", 80)
.style("fill", color); // <<################# IMPORTANT !!
// END svg design
//PRINTING OUT SELECTION
console.log(window.d3.select("body").html());
}
// END (D3JS) * * * * * * * * * * * * * * * * * * * * * * * *
);
Terminal NodeJS command :
COLOR=#66AAFF node svgcreator.node.js > out.svg # <<############# IMPORTANT !! setting the value.
+1 @Matt_Harrison answer and the question appreciated !
In your terminal, you can use environment variables:
In your JS, do:
Or you could add extra arguments to the command:
and in your JS :
If you want to use a library; I would advise looking into the Minimist library, or Commander for a more fully-featured solution.