IconVault's Screen Capture Playground teaches getDisplayMedia with the real thing. Press Share screen and your browser's native picker appears; you can hint the surface preference (monitor, window, or tab) and toggle system audio. The live preview streams your chosen surface, a settings panel shows the actual track values (displaySurface, logicalSurface, resolution, frame rate, cursor mode), and one click captures a full-resolution PNG snapshot you can download. It is free and runs fully in your browser.

Screen capture powers everything from meeting apps to bug-report recorders, but the API surface has real subtleties: the surface hint is only a hint, track settings reveal what the user actually shared, and the ended event fires when they stop from the browser chrome. This lab surfaces all of it, handles the cancel case gracefully, and keeps everything local so your screen never leaves the device.