Node.js: how to pass parameter value from terminal to JS script
For jsdom
jsdom
jsdom
:
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) * * * * * * * * * * * * * * * * * * * * * * * *
);
Considering I'm using the NodeJS terminal command to run it and create a file output.svg
:
node svgcreator.node.js > output.svg # nodeJS + script command
How to pass parameter value from terminal to NodeJS?
Test dependencies:
- svgcreator.node.js github repository :
git clone 'git@github.com:hugolpz/svgcreator.node.js.git'
- Requires jsdom, use:
sudo npm install -g jsdom
(global).
The solution used (@Matt_Harrison): we rely onprocess.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) * * * * * * * * * * * * * * * * * * * * * * * *
);
NodeJS terminal command:
COLOR=#66AAFF node svgcreator.node.js > out.svg # <<############# IMPORTANT !! setting the value.
+1 @Matt_Harrison's answer and question is appreciated!
source to share
In the terminal, you can use environment variables :
$ COLOR=#FFFFFF node jsdom.node.js
In your JS do:
var color = process.env.COLOR;
Or, you can add additional arguments to the command:
$ node jsdom.node.js '#FFFFFF'
and in your JS:
var color = process.argv[2];
If you want to use a library; I would suggest looking into the Minimist or Commander library for a more fully featured solution.
source to share