Render a single DOM element using PhantomJS

renderDomElement.js

/*
 * renderDomElement.js
 * An example of how to render a single DOM element using PhantomJS 2.0
 */

var system = require('system');

if (system.args.length != 4) {
    console.log('Usage: phantomjs renderDomElement.js <url> <class-selector> <output-file>');
    phantom.exit();
} else {
    var page = new WebPage();

    var url = system.args[1];
    var selector = system.args[2];
    var outputFile = system.args[3];
    
    page.open(url, function (status) {
        if (status == 'success') {
            page.clipRect = page.evaluate(function (selector) {
                return document.querySelector(selector).getBoundingClientRect();
            }, selector);
            
            page.render(outputFile);
        }

        phantom.exit();
    });
}

Simple and useful. Thanks!