Node.js Environment

apt-get -qq update
DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends  \
  build-essential gfortran cmake automake libtool libltdl-dev pkg-config \
  libzmq3-dev
apt-get clean
rm -r /var/lib/apt/lists/*

FILENAME="node-v${NODEJS_VERSION}-linux-x64.tar.xz"
FILEURL="https://nodejs.org/dist/v${NODEJS_VERSION}/${FILENAME}"

curl -O https://nodejs.org/dist/v${NODEJS_VERSION}/SHASUMS256.txt
wget --progress=dot:giga ${FILEURL}
grep $FILENAME SHASUMS256.txt | sha256sum -c -
cp $FILENAME /results/

FILENAME="yarn-v${YARN_VERSION}.tar.gz"
FILEURL="https://github.com/yarnpkg/yarn/releases/download/v${YARN_VERSION}/${FILENAME}"

wget -qO- https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --import
wget --progress=dot:giga ${FILEURL} ${FILEURL}.asc
gpg --verify ${FILENAME}.asc
cp $FILENAME /results/

mkdir -p /opt/nodejs
cd /opt/nodejs
tar -Jxf 
node-v10.16.2-linux-x64.tar.xz
ln -s node-v${NODEJS_VERSION}-linux-x64/ default

cd /opt
tar -zxf 
yarn-v1.17.3.tar.gz
ln -s yarn-${YARN_VERSION} yarn

pip install --upgrade jupyter jupyter_client

npm install --unsafe-perm -g ijavascript
ijsinstall

du -hsx /
node -v
npm version
jupyter kernelspec list

"use strict";

$$.async();

{
    let console = global.console;
    let $$ = global.$$;

    setTimeout(function() {
        console.log("Hello, world!");
        $$.sendResult("Bye!");
    }, 1000);
}

function Person(name) {
    this.name = name;
}

var peter = new Person("Peter");

var util = require("util");
console.log(util.inspect(peter));  // shown on stdout
peter;                             // shown as an execution result

Person.prototype.inspect = function inspect(depth) {
    return "Person named " + this.name;
};

peter;

Person.prototype._toHtml = function _toHtml() {
    var style = (
        "display:inline-block;" +
        "padding:0.25em;" +
        "background:#ccc;" +
        "border: 1px solid #888;" +
        "border-radius:0.25em;" +
        "box-shadow: 0.8em 0.4em 0.4em black;"
    );
    return (
        "<div style='" + style + "'>" +
        this.inspect() +
        "</div>"
    );
};

peter;