gl-context.js

module.exports = function runInBrowserContext(input, callback, step, options) {

  // to ignore this from getting browserified
  const puppeteer = eval('require')('puppeteer');

  //Stripped down version of options which is serializable
  var minOptions = require('lodash').cloneDeep(options);
  minOptions.step = options.step.name;

  var obj = { input: input, modOptions: minOptions };

  puppeteer.launch({headless: true, args:['--no-sandbox', '--disable-setuid-sandbox']}).then(function(browser) {
    browser.newPage().then(page => {
      /* Maybe there is a better way to this, loading the page coz localstorage API
            is not available otherwise */
      page.goto('https://google.com').then(() => {
        page.addScriptTag({ path: require('path').join(__dirname, '../../../dist/image-sequencer.js') }).then(() => {
          page.evaluate((options) => {
            return new Promise((resolve, reject) => {
              var sequencer = ImageSequencer();
              sequencer.loadImage(options.input.src);
              sequencer.addSteps(options.modOptions.step, options.modOptions);
              sequencer.run(function cb(out) {
                resolve(sequencer.steps[1].output.src);
              });
            });
          }, obj).then(el => {
            browser.close().then(() => {
              step.output = { src: el, format: input.format };
              callback();
            });
          });
        });
      });
    });
  });
};