The user agent string includes HeadlessChrome instead of Chrome. This is probably the signal that you’re intended to look for, so you could use: /\bHeadlessChrome\//.test(navigator.userAgent) Other interesting signals include: It looks like window.chrome is undefined when headless. [innerWidth, innerHeight] is [800, 600] (hardcoded in headless_browser.cc), while [outerWidth, outerHeight] is [0, 0] (which shouldn’t usually happen).
You can use page.evaluate to manipulate DOM as you see fit: await page.evaluate( () => document.getElementById(“inputID”).value = “”) However sometimes just manipulating a given field might not be enough (a target page could be an SPA with event listeners), so emulating real keypresses is preferable. The examples below are from the informative issue in puppeteer’s … Read more
The DOM is the DOM, and the JavaScript implementation is simply a separate entity. The DOM represents a set of facilities that a web browser exposes to the JavaScript environment. There’s no requirement however that any particular JavaScript runtime will have any facilities exposed via the global object. What Node.js is is a stand-alone JavaScript … Read more
Here are a list of headless browsers that I know about: HtmlUnit – Java. Custom browser engine. Limited JavaScript support/DOM emulated. Open source. Ghost – Python only. WebKit-based. Full JavaScript support. Open source. Twill – Python/command line. Custom browser engine. No JavaScript. Open source. PhantomJS – Command line/all platforms. WebKit-based. Full JavaScript support. Open source. … Read more
you need not use PhantomJS as an alternative to Selenium. Selenium includes a PhantomJS webdriver class, which rides on the GhostDriver platform. Simply install the PhantomJS binary to your machine. in python, you can then use: from selenium import webdriver dr = webdriver.PhantomJS() and voila.