SlimerJS page.papersize = Object

Cygwin bash

#CYGWIN>>
cd  /cygdrive/c/myhtdocs/fdb-calendar-feature/calendar-image-generator
export SLIMERJSLAUNCHER="/cygdrive/c/Program Files (x86)/Mozilla Firefox/firefox.exe"
rm --verbose output-papersize*
slimerjs-0.10.0/slimerjs -debug yes dev-slimerjs-papersize.js 3507 2481 true output-papersize http://www.feestdagen-belgie.be/kalender

dev-slimerjs-papersize.js

/*
 * @doc 300DPI - A4	Landscape -	w 11.69" h 8.27" => width 3507 px - height 2481 px
 */

/*
 * Modules
 * @req Sequence matters!
 */
const system = require('system');
const args = system.args;
let webPage = require('webpage');

/*
 * Constants
 */
const DELAY_RENDER_SECONDS = 3000;  // @doc 3 seconds

// @doc Google Chrome V53
const USER_AGENT = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36';

/*
 * Helper Funcs
 */
function dumpArguments() {
    console.log('#Arguments: ' + args.length);
    args.forEach(function (arg, i) {
        console.log(i + ': ' + arg);
    });
}
function dumpToConsole(title, data) {
    console.log(`---${title || ''} (${typeof data})---: `);
    console.log(data);
}
function consoleLog(data) {
    console.log(`${new Date().toUTCString()} ${data}`);
}
function consoleError(data) {
    console.error(`${new Date().toUTCString()} ${data}`);
}

/*
 * Args
 */
dumpArguments();

let nWidth = Number(system.args[1]) || 1366;
let nHeight = Number(system.args[2]) || 768;
let argClipped = system.args[3] || 'false';
let bClipped = (argClipped === 'true');

let sOutputBaseFileName = system.args[4] || 'screenshot';
let sUrl = system.args[5] || 'http://www.cnn.com/';

dumpToConsole('width', nWidth);
dumpToConsole('height', nHeight);
dumpToConsole('clipped', bClipped);
dumpToConsole('sImageBaseFileName', sOutputBaseFileName);
dumpToConsole('url', sUrl);

/*
 * Variables
 */

/*
 * MAIN
 */
//noinspection JSCheckFunctionSignatures
let page = webPage.create();
page.onLongRunningScript = function (message) {
    dumpToConsole('message', message);
    page.stopJavaScript();
};
page.viewportSize = {
    width: nWidth,
    height: nHeight
};
page.settings.userAgent = USER_AGENT;
if (bClipped) {
    consoleLog('Clipping the output.');
    page.clipRect = {
        top: 0,
        left: 0,
        width: nWidth,
        height: nHeight
    };
}

consoleLog('PDF page.paperSize()');
/////page.paperSize({format: 'A4',orientation: 'landscape'});
page.paperSize = {format: 'A4',orientation: 'landscape'};

consoleLog('Opening webpage.');
page.open(sUrl)
    .then(
        function (status) {
            consoleLog('page.open() promise Status: ' + status);

            if (status !== 'success') {
                consoleError('Cannot open the web page (func status <> success)');
            }

            page.zoomFactor = 2;

            consoleLog('Waiting ' + DELAY_RENDER_SECONDS / 1000 + ' seconds (let the zoomFactor & JS do its work).');
            window.setTimeout(function () {
                consoleLog('Taking screenshot (PDF)');

                consoleLog('PDF page.render()');
                page.render(sOutputBaseFileName + '.pdf', {format: 'pdf'});

                consoleLog('slimer.exit()');
                slimer.exit();
            }, DELAY_RENDER_SECONDS);
        },
        function (error) {
            consoleError('.then(,reject): Cannot open the web page!');
            consoleError(error);
        }
    );