Live technical verification of browser display APIs, platform boundaries, and cross-browser feature matrices.
Modern browsers can report viewport dimensions, device pixel ratios, and frame timings, but they cannot directly read the physical panel diagonal size, native backlight luminance (nits), hardware lookup tables (LUT), or certified response times. A browser supporting an API does not prove your physical display supports that feature natively.
Dynamically probed from your current browser environment
screen.orientationDetects active display orientation type (portrait-primary, landscape-primary) and angle.
Element.requestFullscreen()Expands the active visual test pattern across the entire physical display viewport without browser toolbars.
window.devicePixelRatioRatio of the resolution in physical display pixels to the resolution in CSS pixels.
window.getScreenDetails()Queries detailed information about all connected multi-monitor displays, primary screen identification, and relative spatial geometry.
window.requestAnimationFrame()Schedules visual repaints synchronized with display refresh intervals, allowing high-frame-rate animation testing.
canvas.getContext('2d')High-performance pixel-level rendering used for rapid color cycling, grayscale luminance steps, and sharpness charts.
canvas.getContext('webgl2')Hardware-accelerated 3D graphics context used to query unmasked graphics card renderer and driver vendor details.
navigator.gpuNext-generation low-level GPU compute and graphics interface delivering direct hardware pipeline access.
window.PointerEventUnified hardware input event interface handling mouse clicks, touch points, stylus pressure, and multi-finger gestures.
window.AudioContextSynthesizes precision audio test tones and frequency sweeps to verify external monitor integrated speakers.
navigator.mediaDevices.enumerateDevices()Queries attached audio output hardware endpoints and cameras to identify monitor built-in speaker and webcam links.
navigator.wakeLockPrevents the computer or mobile display from dimming or locking screen during prolonged inspection workflows.
window.localStorageProvides zero-telemetry, 100% client-side persistent storage for monitor profiles, test checklists, and inspection history.
window.print()Triggers native operating system print subsystem with custom print stylesheet to produce clean PDF inspection reports.
window.DeviceMotionEventExposes real-time acceleration vectors (with and without gravity) and rotation rates from device inertial sensors.
window.DeviceOrientationEventProvides physical rotation angles (alpha/yaw, beta/pitch, gamma/roll) relative to the Earth coordinate frame.
navigator.vibrate()Triggers tactile vibration motor pulses and timed vibration sequences on supported mobile devices.
navigator.mediaDevices.getUserMedia()Requests access to local video stream endpoints for live real-time camera testing and preview verification.
MediaStreamTrack.prototype.getSettings()Reads active video stream runtime parameters including resolution width, height, aspect ratio, frame rate, and facing mode.
AudioContext.setSinkId() / HTMLMediaElement.setSinkId()Routes synthesized audio test tones directly to a specific user-selected hardware speaker or headphone output endpoint.
navigator.mediaDevices.getUserMedia({ audio: true })Captures live audio streams from local microphones, headsets, or USB audio interfaces for level analysis and diagnostics.
window.MediaRecorderEncodes and records audio streams directly in the browser with pause, resume, and format detection.