tomayac’s Twitter Archive—№ 15,856

@darth_na @cemper This question is independent from the Idle Detection API, but here's the answer: Page Visibility detects if the screen is locked: w3.org/TR/page-visibility/?csw=1#dfn-steps-to-determine-the-visibility-state:~:text=The%20Operating%20System%20lock%20screen%20is%20shown and so does document.hasFocus(): html.spec.whatwg.org/multipage/interaction.html#has-focus-steps. Demo: hasfocus-test.glitch.me/.