const puppeteer = require('puppeteer');
(async () => {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.goto('http://scikit-learn.org/stable/modules/generated/sklearn.ensemble.GradientBoostingRegressor.html',
        {waitUntil: 'networkidle2'});
    function delay(timeout) {
        return new Promise((resolve) => {
            setTimeout(resolve, timeout);
        });
    }
    const inputField = '#gsc-i-id1';
    page
        .waitForSelector(inputField)
        .then(await page.focus(inputField));
    await page.keyboard.type("new life sakndjsanjdnsajdnas");
    await delay(500);
    await page.screenshot({path: 'input_type.png', fullPage: true});
    await page.focus(inputField);
    await page.keyboard.down('ControlLeft');
    await page.keyboard.press('KeyA');
    await page.keyboard.up('ControlLeft');
    await page.keyboard.type("svm");
    await page.keyboard.press('Enter');
    await delay(1000);
    await page.screenshot({path: 'resulting_page.png', fullPage: true});
    await browser.close();
})();