Granted, this is not the "headless" they're talking about, but rather "chrome-less" (chrome being the browser UI frame around the page itself).. JavaScript Ful

Granted, this is not the "headless" they're talking about, but rather "chrome-less" (chrome being the browser UI frame around the page itself).. JavaScript Fullscreen API: https://developer.mozilla.org/en-US/docs/Web/API/Fullscreen_API https://developer.mozilla.org/en-US/docs/Web/API/Fullscreen_... Cross-browser polyfill: https://github.com/sindresorhus/screenfull.js https://github.com/sindresorhus/screenfull.js